J. Zupan - J. Stefan Institute

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Name
J. Zupan
Affiliation
J. Stefan Institute
City
Ljubljana
Country
Slovenia

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High Energy Physics - Phenomenology (50)
 
High Energy Physics - Experiment (24)
 
Cosmology and Nongalactic Astrophysics (5)
 
High Energy Physics - Theory (1)
 
High Energy Physics - Lattice (1)

Publications Authored By J. Zupan

LHC searches with $\tau$ leptons in the final state are always inclusive in missing-energy sources. A signal in the flavor-violating Higgs decay search, $h\to\tau\mu$, could therefore equally well be due to a flavor conserving decay, but with an extended decay topology with additional invisible particles. We demonstrate this with the three-body decay $h\to\tau\mu\varphi$, where $\varphi$ is a flavorful mediator decaying to a dark-sector. Read More

We show that solving the flavor problem of the Standard Model with a simple $U(1)_H$ flavor symmetry naturally leads to an axion that solves the strong CP problem and constitutes a viable Dark Matter candidate. In this framework, the ratio of the axion mass and its coupling to photons is related to the SM fermion masses and predicted within a small range, as a direct result of the observed hierarchies in quark and charged lepton masses. The same hierarchies determine the axion couplings to fermions, making the framework very predictive and experimentally testable by future axion and precision flavor experiments. Read More

We present the effective field theory for dark matter interactions with the visible sector that is valid at scales of O(1 GeV). Starting with an effective theory describing the interactions of fermionic and scalar dark matter with quarks, gluons and photons via higher dimension operators that would arise from dimension-five and dimension-six operators above electroweak scale, we perform a nonperturbative matching onto a heavy baryon chiral perturbation theory that describes dark matter interactions with light mesons and nucleons. This is then used to obtain the coefficients of the nuclear response functions using a chiral effective theory description of nuclear forces. Read More

2016Oct
Authors: D. de Florian1, C. Grojean2, F. Maltoni3, C. Mariotti4, A. Nikitenko5, M. Pieri6, P. Savard7, M. Schumacher8, R. Tanaka9, R. Aggleton10, M. Ahmad11, B. Allanach12, C. Anastasiou13, W. Astill14, S. Badger15, M. Badziak16, J. Baglio17, E. Bagnaschi18, A. Ballestrero19, A. Banfi20, D. Barducci21, M. Beckingham22, C. Becot23, G. Bélanger24, J. Bellm25, N. Belyaev26, F. U. Bernlochner27, C. Beskidt28, A. Biekötter29, F. Bishara30, W. Bizon31, N. E. Bomark32, M. Bonvini33, S. Borowka34, V. Bortolotto35, S. Boselli36, F. J. Botella37, R. Boughezal38, G. C. Branco39, J. Brehmer40, L. Brenner41, S. Bressler42, I. Brivio43, A. Broggio44, H. Brun45, G. Buchalla46, C. D. Burgard47, A. Calandri48, L. Caminada49, R. Caminal Armadans50, F. Campanario51, J. Campbell52, F. Caola53, C. M. Carloni Calame54, S. Carrazza55, A. Carvalho56, M. Casolino57, O. Cata58, A. Celis59, F. Cerutti60, N. Chanon61, M. Chen62, X. Chen63, B. Chokoufé Nejad64, N. Christensen65, M. Ciuchini66, R. Contino67, T. Corbett68, D. Curtin69, M. Dall'Osso70, A. David71, S. Dawson72, J. de Blas73, W. de Boer74, P. de Castro Manzano75, C. Degrande76, R. L. Delgado77, F. Demartin78, A. Denner79, B. Di Micco80, R. Di Nardo81, S. Dittmaier82, A. Dobado83, T. Dorigo84, F. A. Dreyer85, M. Dührssen86, C. Duhr87, F. Dulat88, K. Ecker89, K. Ellis90, U. Ellwanger91, C. Englert92, D. Espriu93, A. Falkowski94, L. Fayard95, R. Feger96, G. Ferrera97, A. Ferroglia98, N. Fidanza99, T. Figy100, M. Flechl101, D. Fontes102, S. Forte103, P. Francavilla104, E. Franco105, R. Frederix106, A. Freitas107, F. F. Freitas108, F. Frensch109, S. Frixione110, B. Fuks111, E. Furlan112, S. Gadatsch113, J. Gao114, Y. Gao115, M. V. Garzelli116, T. Gehrmann117, R. Gerosa118, M. Ghezzi119, D. Ghosh120, S. Gieseke121, D. Gillberg122, G. F. Giudice123, E. W. N. Glover124, F. Goertz125, D. Gonçalves126, J. Gonzalez-Fraile127, M. Gorbahn128, S. Gori129, C. A. Gottardo130, M. Gouzevitch131, P. Govoni132, D. Gray133, M. Grazzini134, N. Greiner135, A. Greljo136, J. Grigo137, A. V. Gritsan138, R. Gröber139, S. Guindon140, H. E. Haber141, C. Han142, T. Han143, R. Harlander144, M. A. Harrendorf145, H. B. Hartanto146, C. Hays147, S. Heinemeyer148, G. Heinrich149, M. Herrero150, F. Herzog151, B. Hespel152, V. Hirschi153, S. Hoeche154, S. Honeywell155, S. J. Huber156, C. Hugonie157, J. Huston158, A. Ilnicka159, G. Isidori160, B. Jäger161, M. Jaquier162, S. P. Jones163, A. Juste164, S. Kallweit165, A. Kaluza166, A. Kardos167, A. Karlberg168, Z. Kassabov169, N. Kauer170, D. I. Kazakov171, M. Kerner172, W. Kilian173, F. Kling174, K. Köneke175, R. Kogler176, R. Konoplich177, S. Kortner178, S. Kraml179, C. Krause180, F. Krauss181, M. Krawczyk182, A. Kulesza183, S. Kuttimalai184, R. Lane185, A. Lazopoulos186, G. Lee187, P. Lenzi188, I. M. Lewis189, Y. Li190, S. Liebler191, J. Lindert192, X. Liu193, Z. Liu194, F. J. Llanes-Estrada195, H. E. Logan196, D. Lopez-Val197, I. Low198, G. Luisoni199, P. Maierhöfer200, E. Maina201, B. Mansoulié202, H. Mantler203, M. Mantoani204, A. C. Marini205, V. I. Martinez Outschoorn206, S. Marzani207, D. Marzocca208, A. Massironi209, K. Mawatari210, J. Mazzitelli211, A. McCarn212, B. Mellado213, K. Melnikov214, S. B. Menari215, L. Merlo216, C. Meyer217, P. Milenovic218, K. Mimasu219, S. Mishima220, B. Mistlberger221, S. -O. Moch222, A. Mohammadi223, P. F. Monni224, G. Montagna225, M. Moreno Llácer226, N. Moretti227, S. Moretti228, L. Motyka229, A. Mück230, M. Mühlleitner231, S. Munir232, P. Musella233, P. Nadolsky234, D. Napoletano235, M. Nebot236, C. Neu237, M. Neubert238, R. Nevzorov239, O. Nicrosini240, J. Nielsen241, K. Nikolopoulos242, J. M. No243, C. O'Brien244, T. Ohl245, C. Oleari246, T. Orimoto247, D. Pagani248, C. E. Pandini249, A. Papaefstathiou250, A. S. Papanastasiou251, G. Passarino252, B. D. Pecjak253, M. Pelliccioni254, G. Perez255, L. Perrozzi256, F. Petriello257, G. Petrucciani258, E. Pianori259, F. Piccinini260, M. Pierini261, A. Pilkington262, S. Plätzer263, T. Plehn264, R. Podskubka265, C. T. Potter266, S. Pozzorini267, K. Prokofiev268, A. Pukhov269, I. Puljak270, M. Queitsch-Maitland271, J. Quevillon272, D. Rathlev273, M. Rauch274, E. Re275, M. N. Rebelo276, D. Rebuzzi277, L. Reina278, C. Reuschle279, J. Reuter280, M. Riembau281, F. Riva282, A. Rizzi283, T. Robens284, R. Röntsch285, J. Rojo286, J. C. Romão287, N. Rompotis288, J. Roskes289, R. Roth290, G. P. Salam291, R. Salerno292, R. Santos293, V. Sanz294, J. J. Sanz-Cillero295, H. Sargsyan296, U. Sarica297, P. Schichtel298, J. Schlenk299, T. Schmidt300, C. Schmitt301, M. Schönherr302, U. Schubert303, M. Schulze304, S. Sekula305, M. Sekulla306, E. Shabalina307, H. S. Shao308, J. Shelton309, C. H. Shepherd-Themistocleous310, S. Y. Shim311, F. Siegert312, A. Signer313, J. P. Silva314, L. Silvestrini315, M. Sjodahl316, P. Slavich317, M. Slawinska318, L. Soffi319, M. Spannowsky320, C. Speckner321, D. M. Sperka322, M. Spira323, O. Stål324, F. Staub325, T. Stebel326, T. Stefaniak327, M. Steinhauser328, I. W. Stewart329, M. J. Strassler330, J. Streicher331, D. M. Strom332, S. Su333, X. Sun334, F. J. Tackmann335, K. Tackmann336, A. M. Teixeira337, R. Teixeira de Lima338, V. Theeuwes339, R. Thorne340, D. Tommasini341, P. Torrielli342, M. Tosi343, F. Tramontano344, Z. Trócsányi345, M. Trott346, I. Tsinikos347, M. Ubiali348, P. Vanlaer349, W. Verkerke350, A. Vicini351, L. Viliani352, E. Vryonidou353, D. Wackeroth354, C. E. M. Wagner355, J. Wang356, S. Wayand357, G. Weiglein358, C. Weiss359, M. Wiesemann360, C. Williams361, J. Winter362, D. Winterbottom363, R. Wolf364, M. Xiao365, L. L. Yang366, R. Yohay367, S. P. Y. Yuen368, G. Zanderighi369, M. Zaro370, D. Zeppenfeld371, R. Ziegler372, T. Zirke373, J. Zupan374
Affiliations: 1eds., 2eds., 3eds., 4eds., 5eds., 6eds., 7eds., 8eds., 9eds., 10The LHC Higgs Cross Section Working Group, 11The LHC Higgs Cross Section Working Group, 12The LHC Higgs Cross Section Working Group, 13The LHC Higgs Cross Section Working Group, 14The LHC Higgs Cross Section Working Group, 15The LHC Higgs Cross Section Working Group, 16The LHC Higgs Cross Section Working Group, 17The LHC Higgs Cross Section Working Group, 18The LHC Higgs Cross Section Working Group, 19The LHC Higgs Cross Section Working Group, 20The LHC Higgs Cross Section Working Group, 21The LHC Higgs Cross Section Working Group, 22The LHC Higgs Cross Section Working Group, 23The LHC Higgs Cross Section Working Group, 24The LHC Higgs Cross Section Working Group, 25The LHC Higgs Cross Section Working Group, 26The LHC Higgs Cross Section Working Group, 27The LHC Higgs Cross Section Working Group, 28The LHC Higgs Cross Section Working Group, 29The LHC Higgs Cross Section Working Group, 30The LHC Higgs Cross 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This Report summarizes the results of the activities of the LHC Higgs Cross Section Working Group in the period 2014-2016. The main goal of the working group was to present the state-of-the-art of Higgs physics at the LHC, integrating all new results that have appeared in the last few years. The first part compiles the most up-to-date predictions of Higgs boson production cross sections and decay branching ratios, parton distribution functions, and off-shell Higgs boson production and interference effects. Read More

We show that the normalized Higgs production $p_T$ and $y_h$ distributions are sensitive probes of Higgs couplings to light quarks. For up and/or down quark Yukawa couplings comparable to the SM $b$ quark Yukawa the $\bar u u$ or $\bar d d$ fusion production of the Higgs could lead to appreciable softer $p_T$ distribution than in the SM. The rapidity distribution, on the other hand, becomes more forward. Read More

We consider the diphoton excess observed by ATLAS and CMS using the most up-to-date data and estimate the preferred enhancement in the production rate between 8 TeV and 13 TeV. Within the framework of effective field theory (EFT), we then show that for both spin-0 and spin-2 Standard Model (SM) gauge-singlet resonances, two of the three processes S to ZZ, S to Z gamma, and S to WW must occur with a non-zero rate. Moreover, we demonstrate that these branching ratios are highly correlated in the EFT. Read More

We explore several perturbative scenarios in which the di-photon excess at 750 GeV can potentially be explained: a scalar singlet, a two Higgs doublet model (2HDM), a 2HDM with an extra singlet, and the decays of heavier resonances, both vector and scalar. We draw the following conclusions: (i) due to gauge invariance a 750 GeV scalar singlet can accommodate the observed excess more readily than a scalar SU(2)_L doublet; (ii) scalar singlet production via gluon fusion is one option, however, vector boson fusion can also provide a large enough rate, (iii) 2HDMs with an extra singlet and no extra fermions can only give a signal in a severely tuned region of the parameter space; (iv) decays of heavier resonances can give a large enough di-photon signal at 750 GeV, while simultaneously explaining the absence of a signal at 8 TeV. Read More

A discovery of the flavor violating decay h --> tau mu at the LHC would require extra sources of electroweak symmetry breaking (EWSB) beyond the Higgs in order to reconcile it with the bounds from tau --> mu gamma, barring fine-tuned cancellations. In fact, an h --> tau mu decay rate at a level indicated by the CMS measurement is easily realized if the muon and electron masses are due to a new source of EWSB, while the tau mass is due to the Higgs. We illustrate this with two examples: a two Higgs doublet model, and a model in which the Higgs is partially composite, with EWSB triggered by a technicolor sector. Read More

Fermion dark matter (DM) interacting with the standard model through a Higgs portal requires non-renormalizable operators, signaling the presence of new mediator states at the electroweak scale. Collider signatures that involve the mediators are a powerful tool to experimentally probe the Higgs portal interactions, providing complementary information to strong constraints set by direct DM detection searches. Indirect detection experiments are less sensitive to this scenario. Read More

We investigate the phenomenology of flavored dark matter (DM). DM stability is guaranteed by an accidental ${\mathcal Z}_3$ symmetry, a subgroup of the standard model (SM) flavor group that is not broken by the SM Yukawa interactions. We consider an explicit realization where the quark part of the SM flavor group is fully gauged. Read More

In new-physics processes that produce b or c jets, a measurement of the initial b or c-quark polarization could provide crucial information about the structure of the new physics. In the heavy-quark limit, the b and c-quark polarizations are preserved in the lightest baryons they hadronize into, Lambda_b and Lambda_c, respectively. We revisit the prediction for the polarization retention after the hadronization process and extend it to the case of transverse polarization. Read More

We study the implications of non-standard Higgs Yukawa couplings to light quarks on Higgs-portal dark matter phenomenology. Saturating the present experimental bounds on up-quark, down-quark, or strange-quark Yukawa couplings, the predicted direct dark matter detection scattering rate can increase by up to four orders of magnitude. The effect on the dark matter annihilation cross section, on the other hand, is subleading unless the dark matter is very light -- a scenario that is already excluded by measurements of the Higgs invisible decay width. Read More

Generically, the asymmetric interactions in asymmetric dark matter (ADM) models lead to decaying DM. We show that, for ADM that carries nonzero baryon number, the continuous flavor symmetries that generate the flavor structure in the quark sector also imply a looser lower bound on the mass scale of the asymmetric mediators between the dark and visible sectors. The mediators for $B=2$ ADM that can produce a signal in the future indirect dark matter searches can thus also be searched for at the LHC. Read More

We show that a new strongly interacting sector can produce large enhancements of the t-tbar asymmetries at the Tevatron. The Standard Model is extended by a new vector-like flavor triplet of fermions and one heavy scalar, all charged under a hypercolor gauge group SU(3) HC. This simple extension results in a number of new resonances. Read More

2014Jun
Authors: A. J. Bevan, B. Golob, Th. Mannel, S. Prell, B. D. Yabsley, K. Abe, H. Aihara, F. Anulli, N. Arnaud, T. Aushev, M. Beneke, J. Beringer, F. Bianchi, I. I. Bigi, M. Bona, N. Brambilla, J. B rodzicka, P. Chang, M. J. Charles, C. H. Cheng, H. -Y. Cheng, R. Chistov, P. Colangelo, J. P. Coleman, A. Drutskoy, V. P. Druzhinin, S. Eidelman, G. Eigen, A. M. Eisner, R. Faccini, K. T . Flood, P. Gambino, A. Gaz, W. Gradl, H. Hayashii, T. Higuchi, W. D. Hulsbergen, T. Hurth, T. Iijima, R. Itoh, P. D. Jackson, R. Kass, Yu. G. Kolomensky, E. Kou, P. Križan, A. Kronfeld, S. Kumano, Y. J. Kwon, T. E. Latham, D. W. G. S. Leith, V. Lüth, F. Martinez-Vidal, B. T. Meadows, R. Mussa, M. Nakao, S. Nishida, J. Ocariz, S. L. Olsen, P. Pakhlov, G. Pakhlova, A. Palano, A. Pich, S. Playfer, A. Poluektov, F. C. Porter, S. H. Robertson, J. M. Roney, A. Roodman, Y. Sakai, C. Schwanda, A. J. Schwartz, R. Seidl, S. J. Sekula, M. Steinhauser, K. Sumisawa, E. S. Swanson, F. Tackmann, K. Trabelsi, S. Uehara, S. Uno, R. van der Water, G. Vasseur, W. Verkerke, R. Waldi, M. Z. Wang, F. F. Wilson, J. Zupan, A. Zupanc, I. Adachi, J. Albert, Sw. Banerjee, M. Bellis, E. Ben-Haim, P. Biassoni, R. N. Cahn, C. Cartaro, J. Chauveau, C. Chen, C. C. Chiang, R. Cowan, J. Dalseno, M. Davier, C. Davies, J. C. Dingfelder, B. Eche nard, D. Epifanov, B. G. Fulsom, A. M. Gabareen, J. W. Gary, R. Godang, M. T. Graham, A. Hafner, B. Hamilton, T. Hartmann, K. Hayasaka, C. Hearty, Y. Iwasaki, A. Khodjamirian, A. Kusaka, A. Kuzmin, G. D. Lafferty, A. Lazzaro, J. Li, D. Lindemann, O. Long, A. Lusiani, G. Marchiori, M. Martinelli, K. Miyabayashi, R. Mizuk, G. B. Mohanty, D. R. Muller, H. Nakazawa, P. Ongmongkolkul, S. Pacetti, F. Palombo, T. K. Pedlar, L. E. Piilonen, A. Pilloni, V. Poireau, K. Prothmann, T. Pulliam, M. Rama, B. N. Ratcliff, P. Roudeau, S. Schrenk, T. Schroeder, K. R. Schubert, C. P. Shen, B. Shwartz, A. Soffer, E. P. Solodov, A. Somov, M. Starič, S. Stracka, A. V. Telnov, K. Yu. Todyshev, T. Tsuboyama, T. Uglov, A. Vinokurova, J. J. Walsh, Y. Watanabe, E. Won, G. Wormser, D. H. Wright, S. Ye, C. C. Zhang, S. Abachi, A. Abashian, K. Abe, K. Abe, N. Abe, R. Abe, T. Abe, T. Abe, G. S. Abrams, I. Adam, K. Adamczyk, A. Adametz, T. Adye, A. Agarwal, H. Ahmed, M. Ahmed, S. Ahmed, B. S. Ahn, H. S. Ahn, I. J. R. Aitchison, K. Akai, S. Akar, M. Akatsu, M. Akemoto, R. Akhmetshin, R. Akre, M. S. Alam, J. N. Albert, R. Aleksan, J. P. Alexander, G. Alimonti, M. T. Allen, J. Allison, T. Allmendinger, J. R. G. Alsmiller, D. Altenburg, K. E. Alwyn, Q. An, J. Anderson, R. Andreassen, D. Andreotti, M. Andreotti, J. C. Andress, C. Angelini, D. Anipko, A. Anjomshoaa, P. L. Anthony, E. A. Antillon, E. Antonioli, K. Aoki, J. F. Arguin, K. Arinstein, K. Arisaka, K. Asai, M. Asai, Y. Asano, D. J. Asgeirsson, D. M. Asner, T. Aso, M. L. Aspinwall, D. Aston, H. Atmacan, B. Aubert, V. Aulchenko, R. Ayad, T. Azemoon, T. Aziz, V. Azzolini, D. E. Azzopardi, M. A. Baak, J. J. Back, S. Bagnasco, S. Bahinipati, D. S. Bailey, S. Bailey, P. Bailly, N. van Bakel, A. M. Bakich, A. Bala, V. Balagura, R. Baldini-Ferroli, Y. Ban, E. Banas, H. R. Band, S. Banerjee, E. Baracchini, R. Barate, E. Barberio, M. Barbero, D. J. Bard, T. Barillari, N. R. Barlow, R. J. Barlow, M. Barrett, W. Bartel, J. Bartelt, R. Bartoldus, G. Batignani, M. Battaglia, J. M. Bauer, A. Bay, M. Beaulieu, P. Bechtle, T. W. Beck, J. Becker, J. Becla, I. Bedny, S. Behari, P. K. Behera, E. Behn, L. Behr, C. Beigbeder, D. Beiline, R. Bell, F. Bellini, G. Bellodi, K. Belous, M. Benayoun, G. Benelli, J. F. Benitez, M. Benkebil, N. Berger, J. Bernabeu, D. Bernard, R. Bernet, F. U. Bernlochner, J. W. Berryhill, K. Bertsche, P. Besson, D. S. Best, S. Bettarini, D. Bettoni, V. Bhardwaj, W. Bhimji, B. Bhuyan, B. Bhuyan, M. E. Biagini, M. Biasini, K. van Bibber, J. Biesiada, I. Bingham, R. M. Bionta, M. Bischofberger, U. Bitenc, I. Bizjak, F. Blanc, G. Blaylock, V. E. Blinov, E. Bloom, P. C. Bloom, N. L. Blount, J. Blouw, M. 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Cavoto, A. Cecchi, R. Cenci, G. Cerizza, A. Cervelli, A. Ceseracciu, X. Chai, K. S. Chaisanguanthum, M. C. Chang, Y. H. Chang, Y. W. Chang, D. S. Chao, M. Chao, Y. Chao, E. Charles, C. A. Chavez, R. Cheaib, V. Chekelian, A. Chen, A. Chen, E. Chen, G. P. Chen, H. F. Chen, J. -H. Chen, J. C. Chen, K. F. Chen, P. Chen, S. Chen, W. T. Chen, X. Chen, X. R. Chen, Y. Q. Chen, B. Cheng, B. G. Cheon, N. Chevalier, Y. M. Chia, S. Chidzik, K. Chilikin, M. V. Chistiakova, R. Cizeron, I. S. Cho, K. Cho, V. Chobanova, H. H. F. Choi, K. S. Choi, S. K. Choi, Y. Choi, Y. K. Choi, S. Christ, P. H. Chu, S. Chun, A. Chuvikov, G. Cibinetto, D. Cinabro, A. R. Clark, P. J. Clark, C. K. Clarke, R. Claus, B. Claxton, Z. C. Clifton, J. Cochran, J. Cohen-Tanugi, H. Cohn, T. Colberg, S. Cole, F. Colecchia, C. Condurache, R. Contri, P. Convert, M. R. Convery, P. Cooke, N. Copty, C. M. Cormack, F. Dal Corso, L. A. Corwin, F. Cossutti, D. Cote, A. Cotta Ramusino, W. N. Cottingham, F. Couderc, D. P. Coupal, R. Covarelli, G. Cowan, W. W. Craddock, G. Crane, H. B. Crawley, L. Cremaldi, A. Crescente, M. Cristinziani, J. Crnkovic, G. Crosetti, T. Cuhadar-Donszelmann, A. Cunha, S. Curry, A. D'Orazio, S. Dû, G. Dahlinger, B. Dahmes, C. Dallapiccola, N. Danielson, M. Danilov, A. Das, M. Dash, S. Dasu, M. Datta, F. Daudo, P. D. Dauncey, P. David, C. L. Davis, C. T. Day, F. De Mori, G. De Domenico, N. De Groot, C. De la Vaissière, Ch. de la Vaissière, A. de Lesquen, G. De Nardo, R. de Sangro, A. De Silva, S. DeBarger, F. J. Decker, P. del Amo Sanchez, L. Del Buono, V. Del Gamba, D. del Re, G. Della Ricca, A. G. Denig, D. Derkach, I. M. Derrington, H. DeStaebler, J. Destree, S. Devmal, B. Dey, B. Di Girolamo, E. Di Marco, M. Dickopp, M. O. Dima, S. Dittrich, S. Dittongo, P. Dixon, L. Dneprovsky, F. Dohou, Y. Doi, Z. Doležal, D. A. Doll, M. Donald, L. Dong, L. Y. Dong, J. Dorfan, A. Dorigo, M. P. Dorsten, R. Dowd, J. Dowdell, Z. Drásal, J. Dragic, B. W. Drummond, R. S. Dubitzky, G. P. 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Franek, E. D. Frank, K. B. Fransham, S. Fratina, K. Fratini, A. Frey, R. Frey, M. Friedl, M. Fritsch, J. R. Fry, H. Fujii, M. Fujikawa, Y. Fujita, Y. Fujiyama, C. Fukunaga, M. Fukushima, J. Fullwood, Y. Funahashi, Y. Funakoshi, F. Furano, M. Furman, K. Furukawa, H. Futterschneider, E. Gabathuler, T. A. Gabriel, N. Gabyshev, F. Gaede, N. Gagliardi, A. Gaidot, J. -M. Gaillard, J. R. Gaillard, S. Galagedera, F. Galeazzi, F. Gallo, D. Gamba, R. Gamet, K. K. Gan, P. Gandini, S. Ganguly, S. F. Ganzhur, Y. Y. Gao, I. Gaponenko, A. Garmash, J. Garra Tico, I. Garzia, M. Gaspero, F. Gastaldi, C. Gatto, V. Gaur, N. I. Geddes, T. L. Geld, J. -F. Genat, K. A. George, M. George, S. George, Z. Georgette, T. J. Gershon, M. S. Gill, R. Gillard, J. D. Gilman, F. Giordano, M. A. Giorgi, P. -F. Giraud, L. Gladney, T. Glanzman, R. Glattauer, A. Go, K. Goetzen, Y. M. Goh, G. Gokhroo, P. Goldenzweig, V. B. Golubev, G. P. Gopal, A. Gordon, A. Gorišek, V. I. Goriletsky, R. Gorodeisky, L. Gosset, K. Gotow, S. 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Lueck, S. Luitz, P. Lukin, P. Lund, E. Luppi, A. M. Lutz, O. Lutz, G. Lynch, H. L. Lynch, A. J. Lyon, V. R. Lyubinsky, D. B. MacFarlane, C. Mackay, J. MacNaughton, M. M. Macri, S. Madani, W. F. Mader, S. A. Majewski, G. Majumder, Y. Makida, B. Malaescu, R. Malaguti, J. Malclès, U. Mallik, E. Maly, H. Mamada, A. Manabe, G. Mancinelli, M. Mandelkern, F. Mandl, P. F. Manfredi, D. J. J. Mangeol, E. Manoni, Z. P. Mao, M. Margoni, C. E. Marker, G. Markey, J. Marks, D. Marlow, V. Marques, H. Marsiske, S. Martellotti, E. C. Martin, J. P. Martin, L. Martin, A. J. Martinez, M. Marzolla, A. Mass, M. Masuzawa, A. Mathieu, P. Matricon, T. Matsubara, T. Matsuda, T. Matsuda, H. Matsumoto, S. Matsumoto, T. Matsumoto, H. Matsuo, T. S. Mattison, D. Matvienko, A. Matyja, B. Mayer, M. A. Mazur, M. A. Mazzoni, M. McCulloch, J. McDonald, J. D. McFall, P. McGrath, A. K. McKemey, J. A. McKenna, S. E. Mclachlin, S. McMahon, T. R. McMahon, S. McOnie, T. Medvedeva, R. Melen, B. Mellado, W. Menges, S. Menke, A. M. Merchant, J. Merkel, R. Messner, S. Metcalfe, S. Metzler, N. T. Meyer, T. I. Meyer, W. T. Meyer, A. K. Michael, G. Michelon, S. Michizono, P. Micout, V. Miftakov, A. Mihalyi, Y. Mikami, D. A. Milanes, M. Milek, T. Mimashi, J. S. Minamora, C. Mindas, S. Minutoli, L. M. Mir, K. Mishra, W. Mitaroff, H. Miyake, T. S. Miyashita, H. Miyata, Y. Miyazaki, L. C. Moffitt, G. B. Mohanty, A. Mohapatra, A. K. Mohapatra, D. Mohapatra, A. Moll, G. R. Moloney, J. P. Mols, R. K. Mommsen, M. R. Monge, D. Monorchio, T. B. Moore, G. F. Moorhead, P. Mora de Freitas, M. Morandin, N. Morgan, S. E. Morgan, M. Morganti, S. Morganti, S. Mori, T. Mori, M. Morii, J. P. Morris, F. Morsani, G. W. Morton, L. J. Moss, J. P. Mouly, R. Mount, J. Mueller, R. Müller-Pfefferkorn, M. Mugge, F. Muheim, A. Muir, E. Mullin, M. Munerato, A. Murakami, T. Murakami, N. Muramatsu, P. Musico, I. Nagai, T. Nagamine, Y. Nagasaka, Y. Nagashima, S. Nagayama, M. Nagel, M. T. Naisbit, T. Nakadaira, Y. Nakahama, M. Nakajima, T. Nakajima, I. Nakamura, T. Nakamura, T. T. Nakamura, E. Nakano, H. Nakayama, J. W. Nam, S. Narita, I. Narsky, J . A. Nash, Z. Natkaniec, U. Nauenberg, M. Nayak, H. Neal, E. Nedelkovska, M. Negrini, K. Neichi, D. Nelson, S. Nelson, N. Neri, G. Nesom, S. Neubauer, D. Newman-Coburn, C. Ng, X. Nguyen, H. Nicholson, C. Niebuhr, J. Y. Nief, M. Niiyama, M. B. Nikolich, N. K. Nisar, K. Nishimura, Y. Nishio, O. Nitoh, R. Nogowski, S. Noguchi, T. Nomura, M. Nordby, Y. Nosochkov, A. Novokhatski, S. Nozaki, T. Nozaki, I. M. Nugent, C. P. O'Grady, S. W. O'Neale, F. G. O'Neill, B. Oberhof, P. J. Oddone, I. Ofte, A. Ogawa, K. Ogawa, S. Ogawa, Y. Ogawa, R. Ohkubo, K. Ohmi, Y. Ohnishi, F. Ohno, T. Ohshima, Y. Ohshima, N. Ohuchi, K. Oide, N. Oishi, T. Okabe, N. Okazaki, T. Okazaki, S. Okuno, E. O. Olaiya, A. Olivas, P. Olley, J. Olsen, S. Ono, G. Onorato, A. P. Onuchin, Y. Onuki, T. Ooba, T. J. Orimoto, T. Oshima, I. L. Osipenkov, W. Ostrowicz, C. Oswald, S. Otto, J. Oyang, A. Oyanguren, H. Ozaki, V. E. Ozcan, H. P. Paar, C. Padoan, K. Paick, H. Palka, B. Pan, Y. Pan, W. Panduro Vazquez, J. Panetta, A. I. Panova, R. S. Panvini, E. Panzenböck, E. Paoloni, P. Paolucci, M. Pappagallo, S. Paramesvaran, C. S. Park, C. W. Park, H. Park, H. Park, H. K. Park, K. S. Park, W. Park, R. J. Parry, N. Parslow, S. Passaggio, F. C. Pastore, P. M. Patel, C. Patrignani, P. Patteri, T. Pavel, J. Pavlovich, D. J. Payne, L. S. Peak, D. R. Peimer, M. Pelizaeus, R. Pellegrini, M. Pelliccioni, C. C. Peng, J. C. Peng, K. C. Peng, T. Peng, Y. Penichot, S. Pennazzi, M. R. Pennington, R. C. Penny, A. Penzkofer, A. Perazzo, A. Perez, M. Perl, M. Pernicka, J. -P. Perroud, I. M. Peruzzi, R. Pestotnik, K. Peters, M. Peters, B. A. Petersen, T. C. Petersen, E. Petigura, S. Petrak, A. Petrella, M. Petrič, A. Petzold, M. G. Pia, T. Piatenko, D. Piccolo, M. Piccolo, L. Piemontese, M. Piemontese, M. Pierini, S. Pierson, M. Pioppi, G. Piredda, M. Pivk, S. Plaszczynski, F. Polci, A. Pompili, P. Poropat, M. Posocco, C. T. Potter, R. J. L. Potter, V. Prasad, E. Prebys, E. Prencipe, J. Prendki, R. Prepost, M. Prest, M. Prim, M. Pripstein, X. Prudent, S. Pruvot, E. M. T. Puccio, M. V. Purohit, N. D. Qi, H. Quinn, J. Raaf, R. Rabberman, F. Raffaelli, G. Ragghianti, S. Rahatlou, A. M. Rahimi, R. Rahmat, A. Y. Rakitin, A. Randle-Conde, P. Rankin, I. Rashevskaya, S. Ratkovsky, G. Raven, V. Re, M. Reep, J. J. Regensburger, J. Reidy, R. Reif, B. Reisert, C. Renard, F. Renga, S. Ricciardi, J. D. Richman, J. L. Ritchie, M. Ritter, C. Rivetta, G. Rizzo, C. Roat, P. Robbe, D. A. Roberts, A. I. Robertson, E. Robutti, S. Rodier, D. M. Rodriguez, J. L. Rodriguez, R. Rodriguez, N. A. Roe, M. Röhrken, W. Roethel, J. Rolquin, L. Romanov, A. Romosan, M. T. Ronan, G. Rong, F. J. Ronga, L. Roos, N. Root, M. Rosen, E. I. Rosenberg, A. Rossi, A. Rostomyan, M. Rotondo, E. Roussot, J. Roy, M. Rozanska, Y. Rozen, Y. Rozen, A. E. Rubin, W. O. Ruddick, A. M. Ruland, K. Rybicki, A. Ryd, S. Ryu, J. Ryuko, S. Sabik, R. Sacco, M. A. Saeed, F. Safai Tehrani, H. Sagawa, H. Sahoo, S. Sahu, M. Saigo, T. Saito, S. Saitoh, K. Sakai, H. Sakamoto, H. Sakaue, M. Saleem, A. A. Salnikov, E. Salvati, F. Salvatore, A. Samuel, D. A. Sanders, P. Sanders, S. Sandilya, F. Sandrelli, W. Sands, W. R. Sands, M. Sanpei, D. Santel, L. Santelj, V. Santoro, A. Santroni, T. Sanuki, T. R. Sarangi, S. Saremi, A. Sarti, T. Sasaki, N. Sasao, M. Satapathy, Nobuhiko Sato, Noriaki Sato, Y. Sato, N. Satoyama, A. Satpathy, V. Savinov, N. Savvas, O. H. Saxton, K. Sayeed, S. F. Schaffner, T. Schalk, S. Schenk, J. R. Schieck, T. Schietinger, C. J. Schilling, R. H. Schindler, S. Schmid, R. E. Schmitz, H. Schmuecker, O. Schneider, G. Schnell, P. Schönmeier, K. C. Schofield, G. Schott, H. Schröder, M. Schram, J. Schubert, J. Schümann, J. Schultz, B. A. Schumm, M. H. Schune, U. Schwanke, H. Schwarz, J. Schwiening, R. Schwierz, R. F. Schwitters, C. Sciacca, G. Sciolla, I. J. Scott, J. Seeman, A. Seiden, R. Seitz, T. Seki, A. I. Sekiya, S. Semenov, D. Semmler, S. Sen, K. Senyo, O. Seon, V. V. Serbo, S. I. Serednyakov, B. Serfass, M. Serra, J. Serrano, Y. Settai, R. Seuster, M. E. Sevior, K. V. Shakhova, L. Shang, M. Shapkin, V. Sharma, V. Shebalin, V. G. Shelkov, B. C. Shen, D. Z. Shen, Y. T. Shen, D. J. Sherwood, T. Shibata, T. A. Shibata, H. Shibuya, T. Shidara, K. Shimada, M. Shimoyama, S. Shinomiya, J. G. Shiu, H. W. Shorthouse, L. I. Shpilinskaya, A. Sibidanov, E. Sicard, A. Sidorov, V. Sidorov, V. Siegle, M. Sigamani, M. C. Simani, M. Simard, G. Simi, F. Simon, F. Simonetto, N. B. Sinev, H. Singh, J. B. Singh, R. Sinha, S. Sitt, Yu. I. Skovpen, R. J. Sloane, P. Smerkol, A. J. S. Smith, D. Smith, D. Smith, D. Smith, D. S. Smith, J. G. Smith, A. Smol, H. L. Snoek, A. Snyder, R. Y. So, R. J. Sobie, E. Soderstrom, A. Soha, Y. S. Sohn, M. D. Sokoloff, A. Sokolov, P. Solagna, E. Solovieva, N. Soni, P. Sonnek, V. Sordini, B. Spaan, S. M. Spanier, E. Spencer, V. Speziali, M. Spitznagel, P. Spradlin, H. Staengle, R. Stamen, M. Stanek, S. Stanič, J. Stark, M. Steder, H. Steininger, M. Steinke, J. Stelzer, E. Stevanato, A. Stocchi, R. Stock, H. Stoeck, D. P. Stoker, R. Stroili, D. Strom, P. Strother, J. Strube, B. Stugu, J. Stypula, D. Su, R. Suda, R. Sugahara, A. Sugi, T. Sugimura, A. Sugiyama, S. Suitoh, M. K. Sullivan, M. Sumihama, T. Sumiyoshi, D. J. Summers, L. Sun, L. Sun, S. Sun, J. E. Sundermann, H. F. Sung, Y. Susaki, P. Sutcliffe, A. Suzuki, J. Suzuki, J. I. Suzuki, K. Suzuki, S. Suzuki, S. Y. Suzuki, J. E. Swain, S. K. Swain, S. T'Jampens, M. Tabata, K. Tackmann, H. Tajima, O. Tajima, K. Takahashi, S. Takahashi, T. Takahashi, F. Takasaki, T. Takayama, M. Takita, K. Tamai, U. Tamponi, N. Tamura, N. Tan, P. Tan, K. Tanabe, T. Tanabe, H. A. Tanaka, J. Tanaka, M. Tanaka, S. Tanaka, Y. Tanaka, K. Tanida, N. Taniguchi, P. Taras, N. Tasneem, G. Tatishvili, T. Tatomi, M. Tawada, F. Taylor, G. N. Taylor, G. P. Taylor, V. I. Telnov, L. Teodorescu, R. Ter-Antonyan, Y. Teramoto, D. Teytelman, G. Thérin, Ch. Thiebaux, D. Thiessen, E. W. Thomas, J. M. Thompson, F. Thorne, X. C. Tian, M. Tibbetts, I. Tikhomirov, J. S. Tinslay, G. Tiozzo, V. Tisserand, V. Tocut, W. H. Toki, E. W. Tomassini, M. Tomoto, T. Tomura, E. Torassa, E. Torrence, S. Tosi, C. Touramanis, J. C. Toussaint, S. N. Tovey, P. P. Trapani, E. Treadwell, G. Triggiani, S. Trincaz-Duvoid, W. Trischuk, D. Troost, A. Trunov, K. L. Tsai, Y. T. Tsai, Y. Tsujita, K. Tsukada, T. Tsukamoto, J. M. Tuggle, A. Tumanov, Y. W. Tung, L. Turnbull, J. Turner, M. Turri, K. Uchida, M. Uchida, Y. Uchida, M. Ueki, K. Ueno, K. Ueno, N. Ujiie, K. A. Ulmer, Y. Unno, P. Urquijo, Y. Ushiroda, Y. Usov, M. Usseglio, Y. Usuki, U. Uwer, J. Va'vra, S. E. Vahsen, G. Vaitsas, A. Valassi, E. Vallazza, A. Vallereau, P. Vanhoefer, W. C. van Hoek, C. Van Hulse, D. van Winkle, G. Varner, E. W. Varnes, K. E. Varvell, G. Vasileiadis, Y. S. Velikzhanin, M. Verderi, S. Versillé, K. Vervink, B. Viaud, P. B. Vidal, S. Villa, P. Villanueva-Perez, E. L. Vinograd, L. Vitale, G. M. Vitug, C. Voß, C. Voci, C. Voena, A. Volk, J. H. von Wimmersperg-Toeller, V. Vorobyev, A. Vossen, G. Vuagnin, C. O. Vuosalo, K. Wacker, A. P. Wagner, D. L. Wagner, G. Wagner, M. N. Wagner, S. R. Wagner, D. E. Wagoner, D. Walker, W. Walkowiak, D. Wallom, C. C. Wang, C. H. Wang, J. Wang, J. G. Wang, K. Wang, L. Wang, L. L. Wang, P. Wang, P. Wang, T. J. Wang, W. F. Wang, X. L. Wang, Y. F. Wang, F. R. Wappler, M. Watanabe, A. T. Watson, J. E. Watson, N. K. Watson, M. Watt, J. H. Weatherall, M. Weaver, T. Weber, R. Wedd, J. T. Wei, A. W. Weidemann, A. J. R. Weinstein, W. A. Wenzel, C. A. West, C. G. West, T. J. West, E. White, R. M. White, J. Wicht, L. Widhalm, J. Wiechczynski, U. Wienands, L. Wilden, M. Wilder, D. C. Williams, G. Williams, J. C. Williams, K. M. Williams, M. I. Williams, S. Y. Willocq, J. R. Wilson, M. G. Wilson, R. J. Wilson, F. Winklmeier, L. O. Winstrom, M. A. Winter, W. J. Wisniewski, M. Wittgen, J. Wittlin, W. Wittmer, R. Wixted, A. Woch, B. J. Wogsland, E. Won, Q. K. Wong, B. C. Wray, A. C. Wren, D. M. Wright, C. H. Wu, J. Wu, S. L. Wu, H. W. Wulsin, S. M. Xella, Q. L. Xie, Y. Xie, Y. Xie, Z. Z. Xu, Ch. Yèche, Y. Yamada, M. Yamaga, A. Yamaguchi, H. Yamaguchi, T. Yamaki, H. Yamamoto, N. Yamamoto, R. K. Yamamoto, S. Yamamoto, T. Yamanaka, H. Yamaoka, J. Yamaoka, Y. Yamaoka, Y. Yamashita, M. Yamauchi, D. S. Yan, Y. Yan, H. Yanai, S. Yanaka, H. Yang, R. Yang, S. Yang, A. K. Yarritu, S. Yashchenko, J. Yashima, Z. Yasin, Y. Yasu, S. W. Ye, P. Yeh, J. I. Yi, K. Yi, M. Yi, Z. W. Yin, J. Ying, G. Yocky, K. Yokoyama, M. Yokoyama, T. Yokoyama, K. Yoshida, M. Yoshida, Y. Yoshimura, C. C. Young, C. X. Yu, Z. Yu, C. Z. Yuan, Y. Yuan, F. X. Yumiceva, Y. Yusa, A. N. Yushkov, H. Yuta, V. Zacek, S. B. Zain, A. Zallo, S. Zambito, D. Zander, S. L. Zang, D. Zanin, B. G. Zaslavsky, Q. L. Zeng, A. Zghiche, B. Zhang, J. Zhang, J. Zhang, L. Zhang, L. M. Zhang, S. Q. Zhang, Z. P. Zhang, H. W. Zhao, H. W. Zhao, M. Zhao, Z. G. Zhao, Y. Zheng, Y. H. Zheng, Z. P. Zheng, V. Zhilich, P. Zhou, R. Y. Zhu, Y. S. Zhu, Z. M. Zhu, V. Zhulanov, T. Ziegler, V. Ziegler, G. Zioulas, M. Zisman, M. Zito, D. Zürcher, N. Zwahlen, O. Zyukova, T. Živko, D. Žontar

This work is on the Physics of the B Factories. Part A of this book contains a brief description of the SLAC and KEK B Factories as well as their detectors, BaBar and Belle, and data taking related issues. Part B discusses tools and methods used by the experiments in order to obtain results. Read More

We show that both flavor-conserving and flavor-violating Yukawa couplings of the Higgs boson to first- and second-generation quarks can be probed by measuring rare decays of the form h->MV, where M denotes a vector meson and V indicates either gamma, W or Z. We calculate the branching ratios for these processes in both the Standard Model and its possible extensions. We discuss the experimental prospects for their observation. Read More

We study Higgs diphoton decays, in which both photons undergo nuclear conversion to electron- positron pairs. The kinematic distribution of the two electron-positron pairs may be used to probe the CP violating (CPV) coupling of the Higgs to photons, that may be produced by new physics. Detecting CPV in this manner requires interference between the spin-polarized helicity amplitudes for both conversions. Read More

2013Nov
Authors: K. Agashe, R. Erbacher, C. E. Gerber, K. Melnikov, R. Schwienhorst, A. Mitov, M. Vos, S. Wimpenny, J. Adelman, M. Baumgart, A. Garcia-Bellido, A. Loginov, A. Jung, M. Schulze, J. Shelton, N. Craig, M. Velasco, T. Golling, J. Hubisz, A. Ivanov, M. Perelstein, S. Chekanov, J. Dolen, J. Pilot, R. Pöschl, B. Tweedie, S. Alioli, B. Alvarez-Gonzalez, D. Amidei, T. Andeen, A. Arce, B. Auerbach, A. Avetisyan, M. Backovic, Y. Bai, M. Begel, S. Berge, C. Bernard, C. Bernius, S. Bhattacharya, K. Black, A. Blondel, K. Bloom, T. Bose, J. Boudreau, J. Brau, A. Broggio, G. Brooijmans, E. Brost, R. Calkins, D. Chakraborty, T. Childress, G. Choudalakis, V. Coco, J. S. Conway, C. Degrande, A. Delannoy, F. Deliot, L. Dell'Asta, E. Drueke, B. Dutta, A. Effron, K. Ellis, J. Erdmann, J. Evans, C. Feng, E. Feng, A. Ferroglia, K. Finelli, W. Flanagan, I. Fleck, A. Freitas, F. Garberson, R. Gonzalez Suarez, M. L. Graesser, N. Graf, Z. Greenwood, J. George, C. Group, A. Gurrola, G. Hammad, T. Han, Z. Han, U. Heintz, S. Hoeche, T. Horiguchi, I. Iashvili, A. Ismail, S. Jain, P. Janot, W. Johns, J. Joshi, A. Juste, T. Kamon, C. Kao, Y. Kats, A. Katz, M. Kaur, R. Kehoe, W. Keung, S. Khalil, A. Khanov, A. Kharchilava, N. Kidonakis, C. Kilic, N. Kolev, A. Kotwal, J. Kraus, D. Krohn, M. Kruse, A. Kumar, S. Lee, E. Luiggi, S. Mantry, A. Melo, D. Miller, G. Moortgat-Pick, M. Narain, N. Odell, Y. Oksuzian, M. Oreglia, A. Penin, Y. Peters, C. Pollard, S. Poss, H. B. Prosper S. Rappoccio, S. Redford, M. Reece, F. Rizatdinova, P. Roloff, R. Ruiz, M. Saleem, B. Schoenrock, C. Schwanenberger, T. Schwarz, K. Seidel, E. Shabalina, P. Sheldon, F. Simon, K. Sinha, P. Skands, P. Skubik, G. Sterman, D. Stolarski, J. Strube, J. Stupak, S. Su, M. Tesar, S. Thomas, E. Thompson, P. Tipton, E. Varnes, N. Vignaroli, J. Virzi, M. Vogel, D. Walker, K. Wang, B. Webber, J. D. Wells, S. Westhoff, D. Whiteson, M. Williams, S. Wu, U. Yang, H. Yokoya, H. Yoo, H. Zhang, N. Zhou, H. Zhu, J. Zupan

This report summarizes the work of the Energy Frontier Top Quark working group of the 2013 Community Summer Study (Snowmass). Read More

This report represents the response of the Intensity Frontier Quark Flavor Physics Working Group to the Snowmass charge. We summarize the current status of quark flavor physics and identify many exciting future opportunities for studying the properties of strange, charm, and bottom quarks. The ability of these studies to reveal the effects of new physics at high mass scales make them an essential ingredient in a well-balanced experimental particle physics program. Read More

Discovering CP-violating effects in the Higgs sector would constitute an indisputable sign of physics beyond the Standard Model. We derive constraints on the CP-violating Higgs-boson couplings to top and bottom quarks as well as to tau leptons from low-energy bounds on electric dipole moments, resumming large logarithms when necessary. The present and future projections of the sensitivities and comparisons with the LHC constraints are provided. Read More

We perform an analysis of Higgs portal models of dark matter (DM), where DM is light enough to contribute to invisible Higgs decays. Using effective field theory we show that DM can be a thermal relic only if there are additional light particles present with masses below a few 100 GeV. We give three concrete examples of viable Higgs portal models of light DM: (i) the SM extended by DM scalar along with an electroweak triplet and a singlet, (ii) a Two Higgs Doublet Model of type II with additional scalar DM, (iii) SM with DM and an extra scalar singlet that is lighter than DM. Read More

The angle gamma of the standard CKM unitarity triangle can be determined from B -> D K decays with a very small irreducible theoretical error, which is only due to second-order electroweak corrections. We study these contributions and estimate that their impact on the gamma determination is to introduce a shift |delta gamma| <~ O(10^-7), well below any present or planned future experiment. Read More

We derive bounds on squark and slepton masses in mini-split supersymmetry scenario using low energy experiments. In this setup gauginos are at the TeV scale, while sfermions are heavier by a loop factor. We cover the most sensitive low energy probes including electric dipole moments (EDMs), meson oscillations and charged lepton flavor violation (LFV) transitions. Read More

We present halo-independent methods to analyze the results of dark matter direct detection experiments assuming inelastic scattering. We focus on the annual modulation signal reported by DAMA/LIBRA and present three different halo-independent tests. First, we compare it to the upper limit on the unmodulated rate from XENON100 using (a) the trivial requirement that the amplitude of the annual modulation has to be smaller than the bound on the unmodulated rate, and (b) a bound on the annual modulation amplitude based on an expansion in the Earth's velocity. Read More

We show that a large mixing between the right-handed charm and top squarks (i) is allowed by low-energy flavour constraints; (ii) reduces the experimental bound on the stop mass; (iii) has a mild, but beneficial, effect on fine-tuning; (iv) leads to interesting signatures at the LHC not presently investigated by experiments. We estimate the current bound on the stop mass, in presence of flavour mixing, and discuss the new collider signatures. The signal in the t anti-c (c anti-t) + missing E_T channel is large enough that it can be immediately searched for experimentally, while the signature with same-sign tops and missing E_T requires a luminosity upgrade of the LHC. Read More

We explore the relationship between astrophysical gamma-ray signals and LHC signatures for a class of phenomenologically successful secluded dark matter models, motivated by recent evidence for a ~130 GeV gamma-ray line. We consider in detail scenarios in which interactions between the dark sector and the standard model are mediated by a vev-less scalar field \phi, transforming as an N-plet (N > 3) under SU(2)_L. Since some of the component fields of \phi carry large electric charges, loop induced dark matter annihilation to \gamma \gamma and \gamma Z can be enhanced without the need for non-perturbatively large couplings, and without overproduction of continuum gamma-rays from other final states. Read More

The Higgs-like signal observed at the LHC could be due to several mass degenerate resonances. We show that the number of resonances is related to the rank of a "production and decay" matrix, $R_{if}$. Each entry in this matrix contains the observed rate in a particular production mode $i$ and final state $f$. Read More

We investigate the implications of direct CP violation (CPV) on the determination of the unitarity triangle angle \gamma\ from B -> DK decays. We show that \gamma\ can still be extracted even with the inclusion of direct CPV in charm if (i) at least one of the D decays has negligible CP violation; and (ii) data from charm factory at threshold are used. If approximate expressions without including direct CP violation in charm are used, this can result in a shift in \gamma\ that is O(r_D/r_B). Read More

The anomalous forward-backward asymmetry (A_FB) in t tbar production at the Tevatron is in apparent contradiction with the t tbar charge asymmetry (A_C) measurements at the LHC, which agree well with the standard model predictions. We argue that associated production of a state with [u tbar] flavor quantum numbers can lead to a sizable negative contribution to A_C. Exchange of such a resonance in the t-channel would lead to positive contributions to A_FB and A_C, as has been extensively discussed in the literature. Read More

2012Sep
Affiliations: 1Fermilab, 2Fermilab and MPI for Nuclear Physics Heidelberg, 3U of Cincinnati

We study a class of nonstandard interactions of the newly discovered 125 GeV Higgs-like resonance that are especially interesting probes of new physics: flavor violating Higgs couplings to leptons and quarks. These interaction can arise in many frameworks of new physics at the electroweak scale such as two Higgs doublet models, extra dimensions, or models of compositeness. We rederive constraints on flavor violating Higgs couplings using data on rare decays, electric and magnetic dipole moments, and meson oscillations. Read More

Recently, the ATLAS and CMS collaborations have announced the discovery of a 125 GeV particle, commensurable with the Higgs boson. We analyze the 2011 and 2012 LHC and Tevatron Higgs data in the context of simplified new physics models, paying close attention to models which can enhance the diphoton rate and allow for a natural weak-scale theory. Combining the available LHC and Tevatron data in the ZZ* 4-lepton, WW* 2-lepton, diphoton, and b-bbar channels, we derive constraints on the effective low-energy theory of the Higgs boson. Read More

Present measurements of b->c tau nu and b->u tau nu transitions differ from the standard model predictions of lepton flavor universality by almost 4sigma. We examine new physics interpretations of this anomaly. An effective field theory analysis shows that minimal flavor violating models are not preferred as an explanation, but are also not yet excluded. Read More

We show that the charge asymmetry in t tbar production at the LHC, A_C, and the forward-backward asymmetry at the Tevatron, A_FB, are in general not tightly correlated. They can even have opposite signs, if the underlying new physics (NP) model is general enough. We demonstrate this using two examples of NP: a light axigluon, and a vector that is a color octet and electroweak triplet. Read More

2012May
Authors: J. L. Hewett, H. Weerts, R. Brock, J. N. Butler, B. C. K. Casey, J. Collar, A. de Gouvea, R. Essig, Y. Grossman, W. Haxton, J. A. Jaros, C. K. Jung, Z. T. Lu, K. Pitts, Z. Ligeti, J. R. Patterson, M. Ramsey-Musolf, J. L. Ritchie, A. Roodman, K. Scholberg, C. E. M. Wagner, G. P. Zeller, S. Aefsky, A. Afanasev, K. Agashe, C. Albright, J. Alonso, C. Ankenbrandt, M. Aoki, C. A. Arguelles, N. Arkani-Hamed, J. R. Armendariz, C. Armendariz-Picon, E. Arrieta Diaz, J. Asaadi, D. M. Asner, K. S. Babu, K. Bailey, O. Baker, B. Balantekin, B. Baller, M. Bass, B. Batell, J. Beacham, J. Behr, N. Berger, M. Bergevin, E. Berman, R. Bernstein, A. J. Bevan, M. Bishai, M. Blanke, S. Blessing, A. Blondel, T. Blum, G. Bock, A. Bodek, G. Bonvicini, F. Bossi, J. Boyce, R. Breedon, M. Breidenbach, S. J. Brice, R. A. Briere, S. Brodsky, C. Bromberg, A. Bross, T. E. Browder, D. A. Bryman, M. Buckley, R. Burnstein, E. Caden, P. Campana, R. Carlini, G. Carosi, C. Castromonte, R. Cenci, I. Chakaberia, M. C. Chen, C. H. Cheng, B. Choudhary, N. H. Christ, E. Christensen, M. E. Christy, T. E. Chupp, E. Church, D. B. Cline, T. E. Coan, P. Coloma, J. Comfort, L. Coney, J. Cooper, R. J. Cooper, R. Cowan, D. F. Cowen, D. Cronin-Hennessy, A. Datta, G. S. Davies, M. Demarteau, D. P. DeMille, A. Denig, R. Dermisek, A. Deshpande, M. S. Dewey, R. Dharmapalan, J. Dhooghe, M. R. Dietrich, M. Diwan, Z. Djurcic, S. Dobbs, M. Duraisamy, B. Dutta, H. Duyang, D. A. Dwyer, M. Eads, B. Echenard, S. R. Elliott, C. Escobar, J. Fajans, S. Farooq, C. Faroughy, J. E. Fast, B. Feinberg, J. Felde, G. Feldman, P. Fierlinger, P. Fileviez Perez, B. Filippone, P. Fisher, B. T. Flemming, K. T. Flood, R. Forty, M. J. Frank, A. Freyberger, A. Friedland, R. Gandhi, K. S. Ganezer, A. Garcia, F. G. Garcia, S. Gardner, L. Garrison, A. Gasparian, S. Geer, V. M. Gehman, T. Gershon, M. Gilchriese, C. Ginsberg, I. Gogoladze, M. Gonderinger, M. Goodman, H. Gould, M. Graham, P. W. Graham, R. Gran, J. Grange, G. Gratta, J. P. Green, H. Greenlee, R. C. Group, E. Guardincerri, V. Gudkov, R. Guenette, A. Haas, A. Hahn, T. Han, T. Handler, J. C. Hardy, R. Harnik, D. A. Harris, F. A. Harris, P. G. Harris, J. Hartnett, B. He, B. R. Heckel, K. M. Heeger, S. Henderson, D. Hertzog, R. Hill, E. A Hinds, D. G. Hitlin, R. J. Holt, N. Holtkamp, G. Horton-Smith, P. Huber, W. Huelsnitz, J. Imber, I. Irastorza, J. Jaeckel, I. Jaegle, C. James, A. Jawahery, D. Jensen, C. P. Jessop, B. Jones, H. Jostlein, T. Junk, A. L. Kagan, M. Kalita, Y. Kamyshkov, D. M. Kaplan, G. Karagiorgi, A. Karle, T. Katori, B. Kayser, R. Kephart, S. Kettell, Y. K. Kim, M. Kirby, K. Kirch, J. Klein, J. Kneller, A. Kobach, M. Kohl, J. Kopp, M. Kordosky, W. Korsch, I. Kourbanis, A. D. Krisch, P. Krizan, A. S. Kronfeld, S. Kulkarni, K. S. Kumar, Y. Kuno, T. Kutter, T. Lachenmaier, M. Lamm, J. Lancaster, M. Lancaster, C. Lane, K. Lang, P. Langacker, S. Lazarevic, T. Le, K. Lee, K. T. Lesko, Y. Li, M. Lindgren, A. Lindner, J. Link, D. Lissauer, L. S. Littenberg, B. Littlejohn, C. Y. Liu, W. Loinaz, W. Lorenzon, W. C. Louis, J. Lozier, L. Ludovici, L. Lueking, C. Lunardini, D. B. MacFarlane, P. A. N. Machado, P. B. Mackenzie, J. Maloney, W. J. Marciano, W. Marsh, M. Marshak, J. W. Martin, C. Mauger, K. S. McFarland, C. McGrew, G. McLaughlin, D. McKeen, R. McKeown, B. T. Meadows, R. Mehdiyev, D. Melconian, H. Merkel, M. Messier, J. P. Miller, G. Mills, U. K. Minamisono, S. R. Mishra, I. Mocioiu, S. Moed Sher, R. N. Mohapatra, B. Monreal, C. D. Moore, J. G. Morfin, J. Mousseau, L. A. Moustakas, G. Mueller, P. Mueller, M. Muether, H. P. Mumm, C. Munger, H. Murayama, P. Nath, O. Naviliat-Cuncin, J. K. Nelson, D. Neuffer, J. S. Nico, A. Norman, D. Nygren, Y. Obayashi, T. P. O'Connor, Y. Okada, J. Olsen, L. Orozco, J. L. Orrell, J. Osta, B. Pahlka, J. Paley, V. Papadimitriou, M. Papucci, S. Parke, R. H. Parker, Z. Parsa, K. Partyka, A. Patch, J. C. Pati, R. B. Patterson, Z. Pavlovic, G. Paz, G. N. Perdue, D. Perevalov, G. Perez, R. Petti, W. Pettus, A. Piepke, M. Pivovaroff, R. Plunkett, C. C. Polly, M. Pospelov, R. Povey, A. Prakesh, M. V. Purohit, S. Raby, J. L. Raaf, R. Rajendran, S. Rajendran, G. Rameika, R. Ramsey, A. Rashed, B. N. Ratcliff, B. Rebel, J. Redondo, P. Reimer, D. Reitzner, F. Ringer, A. Ringwald, S. Riordan, B. L. Roberts, D. A. Roberts, R. Robertson, F. Robicheaux, M. Rominsky, R. Roser, J. L. Rosner, C. Rott, P. Rubin, N. Saito, M. Sanchez, S. Sarkar, H. Schellman, B. Schmidt, M. Schmitt, D. W. Schmitz, J. Schneps, A. Schopper, P. Schuster, A. J. Schwartz, M. Schwarz, J. Seeman, Y. K. Semertzidis, K. K. Seth, Q. Shafi, P. Shanahan, R. Sharma, S. R. Sharpe, M. Shiozawa, V. Shiltsev, K. Sigurdson, P. Sikivie, J. Singh, D. Sivers, T. Skwarnicki, N. Smith, J. Sobczyk, H. Sobel, M. Soderberg, Y. H. Song, A. Soni, P. Souder, A. Sousa, J. Spitz, M. Stancari, G. C. Stavenga, J. H. Steffen, S. Stepanyan, D. Stoeckinger, S. Stone, J. Strait, M. Strassler, I. A. Sulai, R. Sundrum, R. Svoboda, B. Szczerbinska, A. Szelc, T. Takeuchi, P. Tanedo, S. Taneja, J. Tang, D. B. Tanner, R. Tayloe, I. Taylor, J. Thomas, C. Thorn, X. Tian, B. G. Tice, M. Tobar, N. Tolich, N. Toro, I. S. Towner, Y. Tsai, R. Tschirhart, C. D. Tunnell, M. Tzanov, A. Upadhye, J. Urheim, S. Vahsen, A. Vainshtein, E. Valencia, R. G. Van de Water, R. S. Van de Water, M. Velasco, J. Vogel, P. Vogel, W. Vogelsang, Y. W. Wah, D. Walker, N. Weiner, A. Weltman, R. Wendell, W. Wester, M. Wetstein, C. White, L. Whitehead, J. Whitmore, E. Widmann, G. Wiedemann, J. Wilkerson, G. Wilkinson, P. Wilson, R. J. Wilson, W. Winter, M. B. Wise, J. Wodin, S. Wojcicki, B. Wojtsekhowski, T. Wongjirad, E. Worcester, J. Wurtele, T. Xin, J. Xu, T. Yamanaka, Y. Yamazaki, I. Yavin, J. Yeck, M. Yeh, M. Yokoyama, J. Yoo, A. Young, E. Zimmerman, K. Zioutas, M. Zisman, J. Zupan, R. Zwaska

The Proceedings of the 2011 workshop on Fundamental Physics at the Intensity Frontier. Science opportunities at the intensity frontier are identified and described in the areas of heavy quarks, charged leptons, neutrinos, proton decay, new light weakly-coupled particles, and nucleons, nuclei, and atoms. Read More

We show how constraints on the time integrated event rate from a given dark matter (DM) direct detection experiment can be used to set a stringent constraint on the amplitude of the annual modulation signal in another experiment. The method requires only very mild assumptions about the properties of the local DM distribution: that it is temporally stable on the scale of months and spatially homogeneous on the ecliptic. We apply the method to the annual modulation signal in DAMA/LIBRA, which we compare to the bounds derived from the constraints on the time-averaged rates from XENON10, XENON100, CDMS and SIMPLE. Read More

We devise tests for a new physics origin of the recently measured direct CP violation in singly Cabibbo suppressed D decays. The tests take the form of sum rules for the CP asymmetries in various D decays. They are based on the fact that within the standard model CP violation arises from interference of the dominant tree amplitudes with the Delta I=1/2 penguin amplitudes. Read More

A long-standing puzzle in charm physics is the large difference between the D0 -> K+ K- and D0 -> pi+ pi- decay rates. Recently, the LHCb and CDF collaborations reported a surprisingly large difference between the direct CP asymmetries, Delta A_CP, in these two modes. We show that the two puzzles are naturally related in the Standard Model via s- and d-quark "penguin contractions". Read More

We show that fermionic dark matter (DM) which communicates with the Standard Model (SM) via the Higgs portal is a viable scenario, even if a SM-like Higgs is found at around 125 GeV. Using effective field theory we show that for DM with a mass in the range from about 60 GeV to 2 TeV the Higgs portal needs to be parity violating in order to be in agreement with direct detection searches. For parity conserving interactions we identify two distinct options that remain viable: a resonant Higgs portal, and an indirect Higgs portal. Read More

We derive constraints on the annual modulation signal in Dark Matter (DM) direct detection experiments in terms of the unmodulated event rate. A general bound independent of the details of DM distribution follows from the assumption that the motion of the earth around the sun is the only source of time variation. The bound is valid for a very general class of particle physics models and also holds in the presence of an unknown unmodulated background. Read More

The first experimental evidence for direct CP violation in charm-quark decays has recently been presented by the LHCb collaboration in the difference between the D -> K+ K- and D -> pi+ pi- time-integrated CP asymmetries. We estimate the size of the effects that can be expected within the Standard Model and find that at leading order in 1/mc they are an order of magnitude smaller. However, tree-level annihilation type amplitudes are known to be large experimentally. Read More

Recently the CRESST collaboration has published the long anticipated results of their direct Dark Matter (DM) detection experiment with a CaWO_4 target. The number of observed events exceeds known backgrounds at more than 4 sigma significance, and this excess could potentially be due to DM scattering. We confront this interpretation with null results from other direct detection experiments for a number of theoretical models, and find that consistency is achieved in non-minimal models such as inelastic DM and isospin-violating DM. Read More

We discuss the phenomenology of effective field theories with new scalar or vector representations of the Standard Model quark flavor symmetry group, allowing for large flavor breaking involving the third generation. Such field content can have a relatively low mass scale \lesssim TeV and O(1) couplings to quarks, while being naturally consistent with both flavor violating and flavor diagonal constraints. These theories therefore have the potential for early discovery at LHC, and provide a flavor safe "tool box" for addressing anomalies at colliders and low energy experiments. Read More

Both CDF and DO report a forward-backward asymmetry in t-tbar production that is above the standard model prediction. We review new physics models that can give a large forward backward asymmetry in t-tbar production at the Tevatron and the constraints these models face from searches for dijet resonances and contact interactions, from flavor physics and the t-tbar cross section. Expected signals at the LHC are also reviewed. Read More

We show that the discovery channel for dark matter (DM) production at colliders can be through flavor violating interactions resulting in a novel signature of a single top and large missing transverse energy. We discuss several examples where the production of DM is dominated by flavor violating couplings: minimal flavor violating models with a large bottom Yukawa, models with horizontal symmetries, and DM in nontrivial flavor group representations. Discovery at the 7 TeV LHC with a few fb^-1 may already be possible. Read More

Recently, the CoGeNT collaboration presented a positive signal for an annual modulation in their data set. In light of the long standing annual modulation signal in DAMA/LIBRA, we analyze the compatibility of both of these signal within the hypothesis of dark matter (DM) scattering on nuclei, taking into account existing experimental constraints. We consider the cases of elastic and inelastic scattering with either spin-dependent or spin-independent coupling to nucleons. Read More

In this time of transition to a new generation of quark flavor experiments we review both the theoretical and the experimental progress on the determination of unitarity triangle angles from penguin-dominated B decays. This summarizes the activities of the Working Group VI at the CKM2010 workshop. Read More

We show that the forward-backward asymmetry in top quark pair production can be enhanced by fields that transform nontrivially under the flavour group and satisfy Minimal Flavour Violation, while at the same time the constraints from associated effects on the d \sigma(t anti-t)/d M_{t anti-t} distribution, dijet resonance searches, same sign top pair production and other phenomenology are satisfied. We work out two examples in detail, one where a scalar colour anti-sextet field, that is also an anti-sextet of SU(3)_U, enhances the forward-backward asymmetry, and one where the enhancement arises from a vector colour octet field that is also an octet of SU(3)_U. Read More

We first review the methods for determining gamma from B->D K decays that appeared after CKM 2008. We then discuss the theoretical errors in gamma extraction. The errors due to neglected D-Dbar and B_{d,s}-Bbar_{d,s} mixing can be avoided by including their effects in the fits. Read More

2010Nov
Affiliations: 1Fermilab, 2MPI Heidelberg, 3MPI Heidelberg, 4U Ljubljana and U Cincinnati

Dark matter interacting predominantly with leptons instead of nuclear matter has received a lot of interest recently. In this talk, we investigate the signals expected from such 'leptophilic Dark Matter' in direct detection experiments and in experiments looking for Dark Matter annihilation into neutrinos in the Sun. In a model-independent framework, we calculate the expected interaction rates for different scattering processes, including elastic and inelastic scattering off atomic electron shells, as well as loop-induced scattering off atomic nuclei. Read More

The Higgs boson may decay predominantly into a hidden sector, producing lepton jets instead of the standard Higgs signatures. We propose a search strategy for such a signal at hadron colliders. A promising channel is the associated production of the Higgs with a Z or W, where the dominant background is Z or W plus QCD jets. Read More