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G. Polesello
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G. Polesello
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High Energy Physics - Phenomenology (41)
 
High Energy Physics - Experiment (14)
 
Astrophysics (2)
 
High Energy Physics - Theory (1)

Publications Authored By G. Polesello

In the framework of spin-0 $s$-channel simplified models, we explore the possibility of assessing the structure of dark matter interactions through the associate production of dark matter and $t\bar{t}$ pairs. To this purpose, final states with two leptons are considered and the kinematic properties of the dilepton system is studied. We develop a realistic analysis strategy and provide a detailed evaluation of the achievable sensitivity for the dark matter signal assuming integrated luminosities of $300 \, {\rm fb}^{-1}$ and $3 \, {\rm ab}^{-1}$ at the 14 TeV LHC. Read More

We consider minimal dark matter scenarios featuring momentum-dependent couplings of the dark sector to the Standard Model. We derive constraints from existing LHC searches in the monojet channel, estimate the future LHC sensitivity for an integrated luminosity of 300 fb$^{-1}$, and compare with models exhibiting conventional momentum-independent interactions with the dark sector. In addition to being well motivated by (composite) pseudo-Goldstone dark matter scenarios, momentum-dependent couplings are interesting as they weaken direct detection constraints. Read More

We present the activities of the 'New Physics' working group for the 'Physics at TeV Colliders' workshop (Les Houches, France, 1-19 June, 2015). Our report includes new physics studies connected with the Higgs boson and its properties, direct search strategies, reinterpretation of the LHC results in the building of viable models and new computational tool developments. Important signatures for searches for natural new physics at the LHC and new assessments of the interplay between direct dark matter searches and the LHC are also considered. Read More

2015Jun
Authors: Jalal Abdallah, Henrique Araujo, Alexandre Arbey, Adi Ashkenazi, Alexander Belyaev, Joshua Berger, Celine Boehm, Antonio Boveia, Amelia Brennan, Jim Brooke, Oliver Buchmueller, Matthew Buckley, Giorgio Busoni, Lorenzo Calibbi, Sushil Chauhan, Nadir Daci, Gavin Davies, Isabelle De Bruyn, Paul De Jong, Albert De Roeck, Kees de Vries, Daniele Del Re, Andrea De Simone, Andrea Di Simone, Caterina Doglioni, Matthew Dolan, Herbi K. Dreiner, John Ellis, Sarah Eno, Erez Etzion, Malcolm Fairbairn, Brian Feldstein, Henning Flaecher, Eric Feng, Patrick Fox, Marie-Hélène Genest, Loukas Gouskos, Johanna Gramling, Ulrich Haisch, Roni Harnik, Anthony Hibbs, Siewyan Hoh, Walter Hopkins, Valerio Ippolito, Thomas Jacques, Felix Kahlhoefer, Valentin V. Khoze, Russell Kirk, Andreas Korn, Khristian Kotov, Shuichi Kunori, Greg Landsberg, Sebastian Liem, Tongyan Lin, Steven Lowette, Robyn Lucas, Luca Malgeri, Sarah Malik, Christopher McCabe, Alaettin Serhan Mete, Enrico Morgante, Stephen Mrenna, Yu Nakahama, Dave Newbold, Karl Nordstrom, Priscilla Pani, Michele Papucci, Sophio Pataraia, Bjoern Penning, Deborah Pinna, Giacomo Polesello, Davide Racco, Emanuele Re, Antonio Walter Riotto, Thomas Rizzo, David Salek, Subir Sarkar, Steven Schramm, Patrick Skubic, Oren Slone, Juri Smirnov, Yotam Soreq, Timothy Sumner, Tim M. P. Tait, Marc Thomas, Ian Tomalin, Christopher Tunnell, Alessandro Vichi, Tomer Volansky, Neal Weiner, Stephen M. West, Monika Wielers, Steven Worm, Itay Yavin, Bryan Zaldivar, Ning Zhou, Kathryn Zurek

This document outlines a set of simplified models for dark matter and its interactions with Standard Model particles. It is intended to summarize the main characteristics that these simplified models have when applied to dark matter searches at the LHC, and to provide a number of useful expressions for reference. The list of models includes both s-channel and t-channel scenarios. Read More

2012Mar
Authors: G. Brooijmans, B. Gripaios, F. Moortgat, J. Santiago, P. Skands, D. Albornoz Vásquez, B. C. Allanach, A. Alloul, A. Arbey, A. Azatov, H. Baer, C. Balázs, A. Barr, L. Basso, M. Battaglia, P. Bechtle, G. Bélanger, A. Belyaev, K. Benslama, L. Bergström, A. Bharucha, C. Boehm, M. Bondarenko, O. Bondu, E. Boos, F. Boudjema, T. Bringmann, M. Brown, V. Bunichev, S. Calvet, M. Campanelli, A. Carmona, D. G. Cerdeño, M. Chala, R. S. Chivukula, D. Chowdhury, N. D. Christensen, M. Cirelli, S. Cox, K. Cranmer, J. Da Silva, T. Delahaye, A. De Roeck, A. Djouadi, E. Dobson, M. Dolan, F. Donato, G. Drieu La Rochelle, G. Duda, C. Duhr, B. Dumont, J. Edsjö, J. Ellis, C. Evoli, A. Falkowski, M. Felcini, B. Fuks, E. Gabrielli, D. Gaggero, S. Gascon-Shotkin, D. K. Ghosh, A. Giammanco, R. M. Godbole, P. Gondolo, T. Goto, D. Grasso, P. Gris, D. Guadagnoli, J. F. Gunion, U. Haisch, L. Hartgring, S. Heinemeyer, M. Hirsch, J. Hewett, A. Ismail, T. Jeltema, M. Kadastik, M. Kakizaki, K. Kannike, S. Khalil, J-L. Kneur, M. Krämer, S. Kraml, S. Kreiss, J. Lavalle, R. Leane, J. Lykken, L. Maccione, F. Mahmoudi, M. Mangano, S. P. Martin, D. Maurin, G. Moreau, S. Moretti, I. Moskalenko, G. Moultaka, M. Muhlleitner, I. Niessen, B. O'Leary, E. Orlando, P. Panci, G. Polesello, W. Porod, T. Porter, S. Profumo, H. Prosper, A. Pukhov, A. Racioppi, M. Raidal, M. Rausch de Traubenberg, A. Renaud, J. Reuter, T. G. Rizzo, T. Robens, A. Y. Rodríguez-Marrero, P. Salati, C. Savage, P. Scott, S. Sekmen, A. Semenov, C. -L. Shan, C. Shepherd-Themistocleous, E. H. Simmons, P. Slavich, C. Speckner, F. Staub, A. Strong, R. Taillet, F. S. Thomas, M. C. Thomas, I. Tomalin, M. Tytgat, M. Ughetto, L. Valéry, D. G. E. Walker, A. Weiler, S. M. West, C. D. White, A. J. Williams, A. Wingerter, C. Wymant, J. -H. Yu, C. -P. Yuan, D. Zerwas

We present the activities of the "New Physics" working group for the "Physics at TeV Colliders" workshop (Les Houches, France, 30 May-17 June, 2011). Our report includes new agreements on formats for interfaces between computational tools, new tool developments, important signatures for searches at the LHC, recommendations for presentation of LHC search results, as well as additional phenomenological studies. Read More

A modification to the contransverse mass (MCT) technique for measuring the masses of pair-produced semi-invisibly decaying heavy particles is proposed in which MCT is corrected for non-zero boosts of the centre-of-momentum (CoM) frame of the heavy states in the laboratory transverse plane. Lack of knowledge of the mass of the CoM frame prevents exact correction for this boost, however it is shown that a conservative correction can nevertheless be derived which always generates an MCT value which is less than or equal to the true value of MCT in the CoM frame. The new technique is demonstrated with case studies of mass measurement with fully leptonic ttbar events and with SUSY events possessing a similar final state. Read More

Discoveries at the LHC will soon set the physics agenda for future colliders. This report of a CERN Theory Institute includes the summaries of Working Groups that reviewed the physics goals and prospects of LHC running with 10 to 300/fb of integrated luminosity, of the proposed sLHC luminosity upgrade, of the ILC, of CLIC, of the LHeC and of a muon collider. The four Working Groups considered possible scenarios for the first 10/fb of data at the LHC in which (i) a state with properties that are compatible with a Higgs boson is discovered, (ii) no such state is discovered either because the Higgs properties are such that it is difficult to detect or because no Higgs boson exists, (iii) a missing-energy signal beyond the Standard Model is discovered as in some supersymmetric models, and (iv) some other exotic signature of new physics is discovered. Read More

These proceedings collect the presentations given at the first three meetings of the INFN "Workshop on Monte Carlo's, Physics and Simulations at the LHC", held at the Frascati National Laboratories in 2006. The first part of these proceedings contains pedagogical introductions to several basic topics of both theoretical and experimental high pT LHC physics. The second part collects more specialised presentations. Read More

These proceedings collect the presentations given at the first three meetings of the INFN "Workshop on Monte Carlo's, Physics and Simulations at the LHC", held at the Frascati National Laboratories in 2006. The first part of these proceedings contains pedagogical introductions to several basic topics of both theoretical and experimental high pT LHC physics. The second part collects more specialised presentations. Read More

2008Dec
Authors: The ATLAS Collaboration, G. Aad, E. Abat, B. Abbott, J. Abdallah, A. A. Abdelalim, A. Abdesselam, O. Abdinov, B. Abi, M. Abolins, H. Abramowicz, B. S. Acharya, D. L. Adams, T. N. Addy, C. Adorisio, P. Adragna, T. Adye, J. A. Aguilar-Saavedra, M. Aharrouche, S. P. Ahlen, F. Ahles, A. Ahmad, H. Ahmed, G. Aielli, T. Akdogan, T. P. A. Akesson, G. Akimoto, M. S. Alam, M. A. Alam, J. Albert, S. Albrand, M. Aleksa, I. N. Aleksandrov, F. Alessandria, C. Alexa, G. Alexander, G. Alexandre, T. Alexopoulos, M. Alhroob, G. Alimonti, J. Alison, M. Aliyev, P. P. Allport, S. E. Allwood-Spiers, A. Aloisio, R. Alon, A. Alonso, J. Alonso, M. G. Alviggi, K. Amako, P. Amaral, C. Amelung, V. V. Ammosov, A. Amorim, G. Amoros, N. Amram, C. Anastopoulos, C. F. Anders, K. J. Anderson, A. Andreazza, V. Andrei, M-L. Andrieux, X. S. Anduaga, F. Anghinolfi, A. Antonaki, M. Antonelli, S. Antonelli, B. Antunovic, F. A. Anulli, G. Arabidze, I. Aracena, Y. Arai, A. T. H. Arce, J. P. Archambault, S. Arfaoui, J-F. Arguin, T. Argyropoulos, E. Arik, M. Arik, A. J. Armbruster, O. Arnaez, C. Arnault, A. Artamonov, D. Arutinov, M. Asai, S. Asai, S. Ask, B. Asman, D. Asner, L. Asquith, K. Assamagan, A. Astbury, A. Astvatsatourov, T. Atkinson, G. Atoian, B. Auerbach, E. Auge, K. Augsten, M. A. Aurousseau, N. Austin, G. Avolio, R. Avramidou, A. Axen, C. Ay, G. Azuelos, Y. Azuma, M. A. Baak, G. Baccaglioni, C. Bacci, H. Bachacou, K. Bachas, M. Backes, E. Badescu, P. Bagnaia, Y. Bai, D. C. Bailey, J. T. Baines, O. K. Baker, F. Baltasar Dos Santos Pedrosa, E. Banas, S. Banerjee, D. Banfi, A. Bangert, V. Bansal, S. P. Baranov, S. Baranov, A. Barashkou, T. B. Barber, E. L. Barberio, D. Barberis, M. B. Barbero, D. Y. Bardin, T. Barillari, M. Barisonzi, T. Barklow, N. B. Barlow, B. M. Barnett, R. M. Barnett, S. Baron, A. Baroncelli, A. J. Barr, F. Barreiro, J. Barreiro Guimaraes da Costa, P. Barrillon, R. Bartoldus, D. Bartsch, J. Bastos, R. L. Bates, J. R. Batley, A. Battaglia, M. Battistin, F. Bauer, M. Bazalova, B. Beare, P. H. Beauchemin, R. B. Beccherle, N. Becerici, P. Bechtle, G. A. Beck, H. P. Beck, M. Beckingham, K. H. Becks, I. Bedajanek, A. J. Beddall, A. Beddall, P. Bednar, V. A. Bednyakov, C. Bee, S. Behar Harpaz, P. K. Behera, M. Beimforde, C. Belanger-Champagne, P. J. Bell, W. H. Bell, G. Bella, L. Bellagamba, F. Bellina, M. Bellomo, A. Belloni, K. Belotskiy, O. Beltramello, S. Ben Ami, O. Benary, D. Benchekroun, M. Bendel, B. H. Benedict, N. Benekos, Y. Benhammou, G. P. Benincasa, D. P. Benjamin, M. Benoit, J. R. Bensinger, K. Benslama, S. Bentvelsen, M. Beretta, D. Berge, E. Bergeaas Kuutmann, N. Berger, F. Berghaus, E. Berglund, J. Beringer, K. Bernardet, P. Bernat, R. Bernhard, C. Bernius, T. Berry, A. Bertin, N. Besson, S. Bethke, R. M. Bianchi, M. Bianco, O. Biebel, J. Biesiada, M. Biglietti, H. Bilokon, S. Binet, A. Bingul, C. Bini, C. Biscarat, M. Bischofberger, U. Bitenc, K. M. Black, R. E. Blair, G. Blanchot, C. Blocker, J. Blocki, A. Blondel, W. Blum, U. Blumenschein, C. Boaretto, G. J. Bobbink, A. Bocci, B. Bodine, J. Boek, N. Boelaert, S. Boeser, J. A. Bogaerts, A. Bogouch, C. Bohm, J. Bohm, V. Boisvert, T. Bold, V. Boldea, V. G. Bondarenko, M. Bondioli, M. Boonekamp, C. N. Booth, P. S. L. Booth, J. R. A. Booth, A. Borisov, G. Borissov, I. Borjanovic, S. Borroni, K. Bos, D. Boscherini, M. Bosman, M. Bosteels, H. Boterenbrood, J. Bouchami, J. Boudreau, E. V. Bouhova-Thacker, C. Boulahouache, C. Bourdarios, J. Boyd, I. R. Boyko, A. Braem, P. Branchini, G. W. Brandenburg, A. Brandt, O. Brandt, U. Bratzler, J. E. Brau, H. M. Braun, B. Brelier, J. Bremer, R. Brenner, S. Bressler, D. Breton, N. D. Brett, D. Britton, F. M. Brochu, I. Brock, R. Brock, E. Brodet, F. Broggi, G. Brooijmans, W. K. Brooks, E. Brubaker, P. A. Bruckman de Renstrom, D. Bruncko, R. Bruneliere, S. Brunet, A. Bruni, G. Bruni, M. Bruschi, T. Buanes, F. B. Bucci, P. Buchholz, A. G. Buckley, I. A. Budagov, V. Buescher, L. Bugge, F. Bujor, O. Bulekov, M. Bunse, T. Buran, H. Burckhart, S. Burdin, S. Burke, E. Busato, C. P. Buszello, F. Butin, B. Butler, J. M. Butler, C. M. Buttar, J. M. Butterworth, T. Byatt, S. Cabrera Urban, D. Caforio, O. Cakir, P. Calafiura, G. Calderini, R. Calkins, L. P. Caloba, R. Caloi, D. Calvet, P. Camarri, M. Cambiaghi, D. Cameron, F. Campabadal Segura, S. Campana, M. Campanelli, V. Canale, J. Cantero, M. D. M. Capeans Garrido, I. Caprini, M. Caprini, M. Capua, R. Caputo, C. Caramarcu, R. Cardarelli, T. Carli, G. Carlino, L. Carminati, B. Caron, S. Caron, S. Carron Montero, A. A. Carter, J. R. Carter, J. Carvalho, D. Casadei, M. P. Casado, M. Cascella, C. Caso, A. M. Castaneda Hernadez, E. Castaneda Miranda, V. Castillo Gimenez, N. F. Castro, G. Cataldi, A. Catinaccio, J. R. Catmore, A. Cattai, G. Cattani, S. Caughron, D. Cauz, P. Cavalleri, D. Cavalli, M. Cavalli-Sforza, V. Cavasinni, A. Cazzato, F. Ceradini, A. S. Cerqueira, A. Cerri, L. Cerrito, F. Cerutti, S. A. Cetin, F. Cevenini, A. C. Chafaq, D. Chakraborty, J. D. Chapman, J. W. Chapman, E. C. Chareyre, D. G. Charlton, S. C. Chatterjii, S. Cheatham, S. Chekanov, S. V. Chekulaev, G. A. Chelkov, H. Chen, T. Chen, X. Chen, S. Cheng, T. L. Cheng, A. Cheplakov, V. F. Chepurnov, R. Cherkaoui El Moursli, V. Tcherniatine, D. Chesneanu, E. Cheu, S. L. Cheung, L. Chevalier, F. Chevallier, V. Chiarella, G. Chiefari, L. Chikovani, J. T. Childers, A. Chilingarov, G. Chiodini, S. Chouridou, D. Chren, I. A. Christidi, A. Christov, D. Chromek-Burckhart, M. L. Chu, J. Chudoba, G. Ciapetti, A. K. Ciftci, R. Ciftci, V. Cindro, M. D. Ciobotaru, C. Ciocca, A. Ciocio, M. Cirilli, M. Citterio, A. Clark, W. Cleland, J. C. Clemens, B. Clement, C. Clement, D. Clements, Y. Coadou, M. Cobal, A. Coccaro, J. Cochran, S. Coelli, J. Coggeshall, E. Cogneras, C. D. Cojocaru, J. Colas, B. Cole, A. P. Colijn, C. Collard, N. J. Collins, C. Collins-Tooth, J. Collot, G. Colon, R. Coluccia, P. Conde Muino, E. Coniavitis, M. Consonni, S. Constantinescu, C. Conta, F. Conventi, J. Cook, M. Cooke, B. D. Cooper, N. J. Cooper-Smith, K. Copic, T. Cornelissen, M. Corradi, F. C. Corriveau, A. Corso-Radu, A. Cortes-Gonzalez, G. Costa, M. J. Costa, D. Costanzo, T. Costin, D. Cote, R. Coura Torres, L. Courneyea, G. Cowan, C. C. Cowden, B. E. Cox, K. Cranmer, J. Cranshaw, M. Cristinziani, G. Crosetti, R. C. Crupi, S. Crepe-Renaudin, C. -M. Cuciuc, C. Cuenca Almenar, M. Curatolo, C. J. Curtis, P. Cwetanski, Z. Czyczula, S. D'Auria, M. D'Onofrio, A. D'Orazio, A. Da Rocha Gesualdi Mello, P. V. M. Da Silva, C. V. Da Via, W. Dabrowski, T. Dai, C. Dallapiccola, S. J. Dallison, C. H. Daly, M. Dam, H. O. Danielsson, D. Dannheim, V. Dao, G. Darbo, W. D. Davey, T. Davidek, N. Davidson, R. Davidson, A. R. Davison, I. Dawson, J. W. Dawson, R. K. Daya, K. De, R. de Asmundis, S. De Castro, P. E. De Castro Faria Salgado, S. De Cecco, N. De Groot, P. de Jong, E. De La Cruz-Burelo, C. De La Taille, L. De Mora, M. De Oliveira Branco, D. De Pedis, A. De Salvo, U. De Sanctis, A. De Santo, J. B. De Vivie De Regie, G. De Zorzi, S. Dean, G. Dedes, D. V. Dedovich, P. O. Defay, J. Degenhardt, M. Dehchar, C. Del Papa, J. Del Peso, T. Del Prete, A. Dell'Acqua, L. Dell'Asta, M. Della Pietra, D. della Volpe, M. Delmastro, N. Delruelle, P. A. Delsart, S. Demers, M. Demichev, B. Demirkoz, W. Deng, S. P. Denisov, C. Dennis, F. Derue, P. Dervan, K. K. Desch, P. O. Deviveiros, A. Dewhurst, R. Dhullipudi, A. Di Ciaccio, L. Di Ciaccio, A. Di Domenico, A. Di Girolamo, B. Di Girolamo, S. Di Luise, A. Di Mattia, R. Di Nardo, A. Di Simone, R. Di Sipio, M. A. Diaz, E. B. Diehl, J. Dietrich, S. Diglio, K. Dindar Yagci, D. J. Dingfelder, C. Dionisi, P. Dita, S. Dita, F. Dittus, F. Djama, R. Djilkibaev, T. Djobava, M. A. B. do Vale, M. Dobbs, R. Dobinson, D. Dobos, E. Dobson, M. Dobson, O. B. Dogan, T. Doherty, Y. Doi, J. Dolejsi, I. Dolenc, Z. Dolezal, B. A. Dolgoshein, M. Donega, J. Donini, T. Donszelmann, J. Dopke, D. E. Dorfan, A. Doria, A. Dos Anjos, M. Dosil, A. Dotti, M. T. Dova, A. Doxiadis, A. T. Doyle, J. D. Dragic, Z. Drasal, N. Dressnandt, C. Driouichi, M. Dris, J. Dubbert, E. Duchovni, G. Duckeck, A. Dudarev, M. Duehrssen, I. P. Duerdoth, L. Duflot, M-A. Dufour, M. Dunford, A. Duperrin, H. Duran Yildiz, A. Dushkin, R. Duxfield, M. Dwuznik, M. Dueren, W. L. Ebenstein, S. Eckert, S. Eckweiler, K. Edmonds, P. Eerola, K. Egorov, W. Ehrenfeld, T. Ehrich, T. Eifert, G. Eigen, K. Einsweiler, E. Eisenhandler, T. Ekelof, M. El Kacimi, M. Ellert, S. Elles, K. Ellis, N. Ellis, J. Elmsheuser, M. Elsing, R. Ely, D. Emeliyanov, R. Engelmann, A. Engl, B. Epp, A. Eppig, V. S. Epshteyn, J. Erdmann, A. Ereditato, D. Eriksson, I. Ermoline, J. Ernst, E. Ernst, J. Ernwein, D. Errede, S. Errede, M. Escalier, C. Escobar, X. Espinal Curull, B. Esposito, F. Etienne, A. I. Etienvre, E. Etzion, H. Evans, L. Fabbri, C. Fabre, P. Faccioli, K. Facius, R. M. Fakhrutdinov, S. Falciano, A. C. Falou, Y. Fang, M. Fanti, A. Farbin, A. Farilla, J. Farley, T. Farooque, S. M. Farrington, P. Farthouat, F. Fassi, P. Fassnacht, D. Fassouliotis, B. Fatholahzadeh, L. Fayard, F. Fayette, R. Febbraro, P. Federic, O. L. Fedin, I. Fedorko, L. Feligioni, C. Feng, E. J. Feng, A. B. Fenyuk, J. Ferencei, J. Ferland, W. Fernando, S. Ferrag, A. Ferrari, P. Ferrari, R. Ferrari, A. Ferrer, M. L. Ferrer, D. Ferrere, C. Ferretti, M. Fiascaris, F. Fiedler, A. Filipcic, A. Filippas, F. Filthaut, M. Fincke-Keeler, L. Fiorini, A. Firan, G. Fischer, M. J. Fisher, H. F. Flacher, M. Flechl, I. Fleck, J. Fleckner, P. Fleischmann, S. Fleischmann, C. M. Fleta Corral, T. Flick, L. R. Flores Castillo, M. J. Flowerdew, F. Foehlisch, M. Fokitis, T. Fonseca Martin, D. A. Forbush, A. Formica, A. Forti, J. M. Foster, D. Fournier, A. Foussat, A. J. Fowler, K. F. Fowler, H. Fox, P. Francavilla, S. Franchino, D. Francis, S. Franz, M. Fraternali, S. Fratina, J. Freestone, R. Froeschl, D. Froidevaux, J. A. Frost, C. Fukunaga, E. Fullana Torregrosa, J. Fuster, C. Gabaldon, O. G. Gabizon, T. Gadfort, S. Gadomski, G. Gagliardi, P. Gagnon, E. J. Gallas, M. V. Gallas, B. J. Gallop, E. Galyaev, K. K. Gan, Y. S. Gao, A. Gaponenko, M. Garcia-Sciveres, C. Garcia, J. E. Garcia Navarro, R. W. Gardner, N. Garelli, H. Garitaonandia, V. G. Garonne, C. Gatti, G. Gaudio, O. Gaumer, P. Gauzzi, I. L. Gavrilenko, C. Gay, G. G. Gaycken, J-C. Gayde, E. N. Gazis, C. N. P. Gee, Ch. Geich-Gimbel, K. Gellerstedt, C. Gemme, M. H. Genest, S. Gentile, F. Georgatos, S. George, P. Gerlach, C. Geweniger, H. Ghazlane, P. Ghez, N. Ghodbane, B. Giacobbe, S. Giagu, V. Giangiobbe, F. Gianotti, B. Gibbard, A. Gibson, S. M. Gibson, L. M. Gilbert, M. Gilchriese, V. Gilewsky, A. R. Gillman, D. M. Gingrich, J. Ginzburg, N. Giokaris, M. P. Giordani, P. Giovannini, P. F. Giraud, P. Girtler, D. Giugni, P. Giusti, B. K. Gjelsten, L. K. Gladilin, C. Glasman, A. Glazov, K. W. Glitza, G. L. Glonti, K. G. Gnanvo, J. G. Godfrey, J. Godlewski, T. Goepfert, C. Goessling, T. Goettfert, V. G. Goggi, S. Goldfarb, D. Goldin, T. Golling, N. P. Gollub, A. Gomes, R. Goncalo, C. Gong, S. Gonzalez de la Hoz, M. L. Gonzalez Silva, S. Gonzalez-Sevilla, J. J. Goodson, L. Goossens, P. A. Gorbounov, H. Gordon, I. Gorelov, G. Gorfine, B. Gorini, E. Gorini, A. Gorisek, E. Gornicki, S. A. Gorokhov, S. V. Goryachev, V. N. Goryachev, B. Gosdzik, M. Gosselink, M. I. Gostkin, I. Gough Eschrich, M. Gouighri, D. Goujdami, M. Goulette, A. G. Goussiou, S. Gowdy, C. Goy, I. Grabowska-Bold, P. Grafstroem, K-J. Grahn, L. Granado Cardoso, F. Grancagnolo, S. Grancagnolo, V. Gratchev, H. M. Gray, J. A. Gray, E. Graziani, B. Green, Z. D. Greenwood, I. M. Gregor, E. Griesmayer, N. Grigalashvili, A. A. Grillo, K. Grimm, Y. V. Grishkevich, L. S. Groer, J. Grognuz, M. Groh, M. Groll, E. Gross, J. Grosse-Knetter, J. Groth-Jensen, C. Gruse, K. Grybel, V. J. Guarino, C. Guicheney, A. G. Guida, T. Guillemin, J. Gunther, B. Guo, A. Gupta, Y. Gusakov, P. Gutierrez, N. G. Guttman, O. Gutzwiller, C. Guyot, C. Gwenlan, C. B. Gwilliam, A. 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Reljic, C. Rembser, Z. Ren, P. Renkel, S. Rescia, M. Rescigno, S. Resconi, B. Resende, E. Rezaie, P. Reznicek, A. Richards, R. A. Richards, R. Richter, E. Richter-Was, M. Ridel, S. Rieke, M. Rijpstra, M. Rijssenbeek, A. Rimoldi, R. R. Rios, C. Risler, I. Riu, G. Rivoltella, F. Rizatdinova, K. Roberts, S. H. Robertson, A. Robichaud-Veronneau, D. Robinson, A. Robson, J. G. Rocha de Lima, C. Roda, D. Rodriguez, Y. Rodriguez, S. Roe, O. Rohne, V. Rojo, S. Rolli, A. Romaniouk, V. M. Romanov, G. Romeo, D. Romero, L. Roos, E. Ros, S. Rosati, G. A. Rosenbaum, E. I. Rosenberg, L. Rosselet, L. P. Rossi, M. Rotaru, J. Rothberg, I. Rottlaender, D. Rousseau, C. R. Royon, A. Rozanov, Y. Rozen, B. Ruckert, N. Ruckstuhl, V. I. Rud, G. Rudolph, F. Ruehr, F. Ruggieri, A. Ruiz-Martinez, V. Rumiantsev, L. Rumyantsev, N. A. Rusakovich, D. R. Rust, J. P. Rutherfoord, C. Ruwiedel, P. Ruzicka, Y. F. Ryabov, V. Ryadovikov, P. Ryan, A. M. Rybin, G. Rybkin, S. Rzaeva, A. F. Saavedra, H. F-W. Sadrozinski, R. 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Schultz-Coulon, J. Schumacher, M. Schumacher, B. S. Schumm, Ph. Schune, C. S. Schwanenberger, A. Schwartzman, Ph. Schwemling, R. Schwienhorst, R. Schwierz, J. Schwindling, W. G. Scott, E. Sedykh, E. Segura, S. C. Seidel, A. Seiden, F. S. Seifert, J. M. Seixas, G. Sekhniaidze, D. M. Seliverstov, B. Sellden, M. Seman, N. Semprini-Cesari, C. Serfon, L. Serin, R. Seuster, H. Severini, M. E. Sevior, A. Sfyrla, L. Shan, J. T. Shank, M. Shapiro, P. B. Shatalov, L. Shaver, C. Shaw, K. S. Shaw, D. Sherman, P. Sherwood, A. Shibata, M. Shimojima, T. Shin, A. Shmeleva, M. J. Shochet, M. A. Shupe, P. Sicho, A. Sidoti, A. Siebel, M. Siebel, J. Siegrist, D. Sijacki, O. Silbert, J. Silva, S. B. Silverstein, V. Simak, Lj. Simic, S. Simion, B. Simmons, M. Simonyan, P. Sinervo, V. Sipica, G. Siragusa, A. N. Sisakyan, S. Yu. Sivoklokov, J. Sjolin, P. Skubic, N. Skvorodnev, T. Slavicek, K. Sliwa, J. Sloper, T. Sluka, V. Smakhtin, S. Yu. Smirnov, Y. Smirnov, L. N. Smirnova, O. Smirnova, B. C. Smith, K. M. Smith, M. Smizanska, K. Smolek, A. A. Snesarev, S. W. Snow, J. Snow, J. Snuverink, S. Snyder, M. Soares, R. Sobie, J. Sodomka, A. Soffer, C. A. Solans, M. Solar, E. Solfaroli Camillocci, A. A. Solodkov, O. V. Solovyanov, R. Soluk, J. Sondericker, V. Sopko, B. Sopko, M. Sosebee, V. V. Sosnovtsev, L. Sospedra Suay, A. Soukharev, S. Spagnolo, F. Spano, P. Speckmayer, E. Spencer, R. Spighi, G. Spigo, F. Spila, R. Spiwoks, L. Spogli, M. Spousta, T. Spreitzer, B. Spurlock, R. D. St. Denis, T. Stahl, R. Stamen, S. N. Stancu, E. Stanecka, R. W. Stanek, C. Stanescu, S. Stapnes, E. A. Starchenko, J. Stark, P. Staroba, J. Stastny, A. Staude, P. Stavina, G. Stavropoulos, P. Steinbach, P. Steinberg, I. Stekl, H. J. Stelzer, H. Stenzel, K. S. Stevenson, G. Stewart, T. D. Stewart, M. C. Stockton, G. Stoicea, S. Stonjek, P. Strachota, A. Stradling, A. Straessner, J. Strandberg, S. Strandberg, A. Strandlie, M. Strauss, P. Strizenec, R. Strohmer, D. M. Strom, J. A. Strong, R. Stroynowski, B. Stugu, I. Stumer, D. Su, S. Subramania, S. I. Suchkov, Y. Sugaya, T. Sugimoto, C. Suhr, M. Suk, V. V. Sulin, S. Sultansoy, J. E. Sundermann, K. Suruliz, S. Sushkov, G. Susinno, M. R. Sutton, T. Suzuki, Yu. M. Sviridov, I. Sykora, T. Sykora, R. R. Szczygiel, T. Szymocha, J. Sanchez, D. Ta, A. T. Taffard, R. Tafirout, A. Taga, Y. Takahashi, H. Takai, R. Takashima, H. Takeda, T. Takeshita, M. Talby, B. Tali, A. Talyshev, M. C. Tamsett, J. Tanaka, R. Tanaka, S. Tanaka, S. Tanaka, G. P. Tappern, S. Tapprogge, S. Tarem, F. Tarrade, G. F. Tartarelli, P. Tas, M. Tasevsky, E. T. Tassi, C. Taylor, F. E. Taylor, G. N. Taylor, R. P. Taylor, W. Taylor, F. Tegenfeldt, P. Teixeira-Dias, H. Ten Kate, P. K. Teng, S. Terada, K. Terashi, J. Terron, M. Terwort, R. J. Teuscher, C. M. Tevlin, J. Thadome, R. Thananuwong, M. Thioye, J. P. Thomas, T. L. Thomas, E. N. Thompson, P. D. Thompson, R. J. Thompson, A. S. Thompson, E. Thomson, R. P. Thun, T. Tic, V. O. Tikhomirov, Y. A. Tikhonov, C. J. W. P. Timmermans, P. Tipton, F. J. Tique Aires Viegas, S. Tisserant, J. Tobias, B. Toczek, T. T. Todorov, S. Todorova-Nova, J. Tojo, S. Tokar, K. Tokushuku, L. Tomasek, M. Tomasek, F. Tomasz, M. Tomoto, D. Tompkins, L. Tompkins, K. Toms, A. Tonazzo, G. Tong, A. Tonoyan, C. Topfel, N. D. Topilin, E. Torrence, E. Torro Pastor, J. Toth, F. Touchard, D. R. Tovey, S. N. Tovey, T. Trefzger, L. Tremblet, A. Tricoli, I. M. Trigger, S. Trincaz-Duvoid, M. F. Tripiana, N. Triplett, W. Trischuk, A. Trivedi, B. Trocme, C. Troncon, C. Tsarouchas, J. C-L. Tseng, I. Tsiafis, M. Tsiakiris, P. V. Tsiareshka, G. Tsipolitis, E. G. Tskhadadze, I. I. Tsukerman, V. Tsulaia, S. Tsuno, M. Turala, D. Turecek, I. Turk Cakir, E. Turlay, P. M. Tuts, M. S. Twomey, M. Tyndel, D. Typaldos, G. Tzanakos, I. Ueda, M. Uhrmacher, F. Ukegawa, G. Unal, D. G. Underwood, A. Undrus, G. Unel, Y. Unno, E. Urkovsky, P. Urquijo, P. Urrejola, G. Usai, L. Vacavant, V. Vacek, B. Vachon, S. Vahsen, C. Valderanis, J. Valenta, P. Valente, S. Valkar, J. A. Valls Ferrer, H. Van der Bij, H. van der Graaf, E. van der Kraaij, E. van der Poel, N. van Eldik, P. van Gemmeren, Z. van Kesteren, I. van Vulpen, R. VanBerg, W. Vandelli, G. Vandoni, A. Vaniachine, P. Vankov, F. Vannucci, F. Varela Rodriguez, R. Vari, E. W. Varnes, D. Varouchas, A. Vartapetian, K. E. Varvell, V. I. Vassilakopoulos, L. Vassilieva, E. Vataga, F. Vazeille, G. Vegni, J. J. Veillet, C. Vellidis, F. Veloso, R. Veness, S. Veneziano, A. Ventura, D. Ventura, S. Ventura, N. Venturi, V. Vercesi, M. Verducci, W. Verkerke, J. C. Vermeulen, M. C. Vetterli, I. Vichou, T. Vickey, G. H. A. Viehhauser, M. Villa, E. G. Villani, M. Villaplana Perez, E. Vilucchi, M. G. Vincter, V. B. Vinogradov, M. Virchaux, S. Viret, J. Virzi, A. Vitale, O. V. Vitells, I. Vivarelli, R. Vives, F. Vives Vaques, S. Vlachos, M. Vlasak, N. Vlasov, H. Vogt, P. Vokac, M. Volpi, G. Volpini, H. von der Schmitt, J. von Loeben, E. von Toerne, V. Vorobel, A. P. Vorobiev, V. Vorwerk, M. Vos, R. Voss, T. T. Voss, J. H. Vossebeld, N. Vranjes, V. Vrba, M. Vreeswijk, T. Vu Anh, M. Vudragovic, R. Vuillermet, I. Vukotic, P. Wagner, H. Wahlen, J. Walbersloh, J. Walder, R. Walker, W. Walkowiak, R. Wall, C. Wang, J. Wang, J. C. Wang, S. M. W. Wang, C. P. Ward, M. Warsinsky, P. M. Watkins, A. T. Watson, G. Watts, S. W. Watts, A. T. Waugh, B. M. Waugh, M. Webel, J. Weber, M. Weber, M. S. Weber, P. Weber, A. R. Weidberg, J. Weingarten, C. Weiser, H. Wellenstein, P. S. Wells, M. Wen, T. Wenaus, S. Wendler, T. Wengler, S. Wenig, N. Wermes, M. Werner, P. Werner, U. Werthenbach, M. Wessels, S. J. Wheeler-Ellis, S. P. Whitaker, A. White, M. J. White, S. White, D. Whiteson, D. Whittington, F. Wicek, D. Wicke, F. J. Wickens, W. Wiedenmann, M. Wielers, P. Wienemann, C. Wiglesworth, A. Wildauer, M. A. Wildt, I. Wilhelm, H. G. Wilkens, H. H. Williams, W. Willis, S. Willocq, J. A. Wilson, M. G. Wilson, A. Wilson, I. Wingerter-Seez, F. W. Winklmeier, L. Winton, M. Wittgen, M. W. Wolter, H. Wolters, B. Wosiek, J. Wotschack, M. J. Woudstra, K. Wraight, C. Wright, B. Wrona, S. L. Wu, X. Wu, S. Xella, S. Xie, Y. Xie, G. Xu, N. Xu, A. Yamamoto, S. Yamamoto, T. Yamamura, K. Yamanaka, T. Yamazaki, Y. Yamazaki, Z. Yan, H. Yang, U. K. Yang, Y. Yang, Z. Yang, W-M. Yao, Y. Yao, Y. Yasu, J. Ye, S. Ye, M. Yilmaz, R. Yoosoofmiya, K. Yorita, R. Yoshida, C. Young, S. P. Youssef, D. Yu, J. Yu, M. Yu, X. Yu, J. Yuan, L. Yuan, A. Yurkewicz, R. Zaidan, A. M. Zaitsev, Z. Zajacova, L. Zanello, P. Zarzhitsky, A. Zaytsev, M. Zdrazil, C. Zeitnitz, M. Zeller, P. F. Zema, C. Zendler, A. V. Zenin, T. Zenis, Z. Zenonos, S. Zenz, D. Zerwas, Z. Zhan, H. Zhang, J. Zhang, Q. Zhang, W. Zheng, X. Zhang, L. Zhao, T. Zhao, Z. Zhao, A. Zhelezko, A. Zhemchugov, S. Zheng, J. Zhong, B. Zhou, N. Zhou, S. Zhou, Y. Zhou, C. G. Zhu, H. Zhu, Y. Zhu, X. A. Zhuang, V. Zhuravlov, B. Zilka, R. Zimmermann, S. Zimmermann, M. Zinna, M. Ziolkowski, R. Zitoun, L. Zivkovic, V. V. Zmouchko, G. Zobernig, A. Zoccoli, M. zur Nedden, V. Zychacek

A detailed study is presented of the expected performance of the ATLAS detector. The reconstruction of tracks, leptons, photons, missing energy and jets is investigated, together with the performance of b-tagging and the trigger. The physics potential for a variety of interesting physics processes, within the Standard Model and beyond, is examined. Read More

This collection of studies on new physics at the LHC constitutes the report of the supersymmetry working group at the Workshop `Physics at TeV Colliders', Les Houches, France, 2007. They cover the wide spectrum of phenomenology in the LHC era, from alternative models and signatures to the extraction of relevant observables, the study of the MSSM parameter space and finally to the interplay of LHC observations with additional data expected on a similar time scale. The special feature of this collection is that while not each of the studies is explicitely performed together by theoretical and experimental LHC physicists, all of them were inspired by and discussed in this particular environment. Read More

2008Jan
Affiliations: 1Univ. of Torino and INFN-Torino, 2Univ. of Torino and INFN-Torino, 3INFN-Pavia, 4Korea Institute of Advanced Study, Seoul

We study how the properties of the four neutralino states, chi_i (i = 1, 2, 3, 4), can be investigated at the Large Hadron Collider (LHC), in the case when the lightest one, chi_1, has a mass m_chi < 50 GeV and is stable. This situation arises naturally in supersymmetric models where gaugino masses are not unified at a Grand Unified (GUT) scale and R-parity is conserved. The main features of these neutralino states are established by analytical and numerical analyses, and two scenarios are singled out on the basis of the cosmological properties required for the relic neutralinos. Read More

2008Jan

This review presents flavour related issues in the production and decays of heavy states at LHC, both from the experimental side and from the theoretical side. We review top quark physics and discuss flavour aspects of several extensions of the Standard Model, such as supersymmetry, little Higgs model or models with extra dimensions. This includes discovery aspects as well as measurement of several properties of these heavy states. Read More

2008Jan
Authors: G. Buchalla, T. K. Komatsubara, F. Muheim, L. Silvestrini, M. Artuso, D. M. Asner, P. Ball, E. Baracchini, G. Bell, M. Beneke, J. Berryhill, A. Bevan, I. I. Bigi, M. Blanke, Ch. Bobeth, M. Bona, F. Borzumati, T. Browder, T. Buanes, O. Buchmuller, A. J. Buras, S. Burdin, D. G. Cassel, R. Cavanaugh, M. Ciuchini, P. Colangelo, G. Crosetti, A. Dedes, F. De Fazio, S. Descotes-Genon, J. Dickens, Z. Dolezal, S. Durr, U. Egede, C. Eggel, G. Eigen, S. Fajfer, Th. Feldmann, R. Ferrandes, P. Gambino, T. Gershon, V. Gibson, M. Giorgi, V. V. Gligorov, B. Golob, A. Golutvin, Y. Grossman, D. Guadagnoli, U. Haisch, M. Hazumi, S. Heinemeyer, G. Hiller, D. Hitlin, T. Huber, T. Hurth, T. Iijima, A. Ishikawa, G. Isidori, S. Jager, A. Khodjamirian, P. Koppenburg, T. Lagouri, U. Langenegger, C. Lazzeroni, A. Lenz, V. Lubicz, W. Lucha, H. Mahlke, D. Melikhov, F. Mescia, M. Misiak, M. Nakao, J. Napolitano, N. Nikitin, U. Nierste, K. Oide, Y. Okada, P. Paradisi, F. Parodi, M. Patel, A. A. Petrov, T. N. Pham, M. Pierini, S. Playfer, G. Polesello, A. Policicchio, A. Poschenrieder, P. Raimondi, S. Recksiegel, P. Reznicek, A. Robert, S. Robertson, J. L. Rosner, G. Ruggiero, A. Sarti, O. Schneider, F. Schwab, S. Simula, S. Sivoklokov, P. Slavich, C. Smith, M. Smizanska, A. Soni, T. Speer, P. Spradlin, M. Spranger, A. Starodumov, B. Stech, A. Stocchi, S. Stone, C. Tarantino, F. Teubert, S. T'Jampens, K. Toms, K. Trabelsi, S. Trine, S. Uhlig, V. Vagnoni, J. J. van Hunen, G. Weiglein, A. Weiler, G. Wilkinson, Y. Xie, M. Yamauchi, G. Zhu, J. Zupan, R. Zwicky

With the advent of the LHC, we will be able to probe New Physics (NP) up to energy scales almost one order of magnitude larger than it has been possible with present accelerator facilities. While direct detection of new particles will be the main avenue to establish the presence of NP at the LHC, indirect searches will provide precious complementary information, since most probably it will not be possible to measure the full spectrum of new particles and their couplings through direct production. In particular, precision measurements and computations in the realm of flavour physics are expected to play a key role in constraining the unknown parameters of the Lagrangian of any NP model emerging from direct searches at the LHC. Read More

A new technique for improving the precision of measurements of SUSY particle masses at the LHC is introduced. The technique involves kinematic fitting of events with two fully identified decay chains. We incorporate both event ETmiss constraints and independent constraints provided by kinematic end-points in experiment invariant mass distributions of SUSY decay products. Read More

2006Feb
Affiliations: 1ed., 2ed., 3ed.

The work contained herein constitutes a report of the "Beyond the Standard Model'' working group for the Workshop "Physics at TeV Colliders", Les Houches, France, 2-20 May, 2005. We present reviews of current topics as well as original research carried out for the workshop. Supersymmetric and non-supersymmetric models are studied, as well as computational tools designed in order to facilitate their phenomenology. Read More

In the event that R-Parity conserving supersymmetry (SUSY) is discovered at the LHC, a key issue which will need to be addressed will be the consistency of that signal with astrophysical and non-accelerator constraints on SUSY Dark Matter. This issue is studied for the SPA benchmark model based on measurements of end-points and thresholds in the invariant mass spectra of various combinations of leptons and jets. These measurements are used to constrain the soft SUSY breaking parameters at the electroweak scale in a general MSSM model. Read More

Coherent analyses of experimental results from LHC and ILC will allow us to draw a comprehensive and precise picture of the supersymmetric particle sector. Based on this platform the fundamental supersymmetric theory can be reconstructed at the high scale which is potentially close to the Planck scale. This procedure will be reviewed for three characteristic examples: minimal supergravity as the paradigm; a left-right symmetric extension incorporating intermediate mass scales; and a specific realization of string effective theories. Read More

2005Nov
Authors: J. A. Aguilar-Saavedra, A. Ali, B. C. Allanach, R. Arnowitt, H. A. Baer, J. A. Bagger, C. Balazs, V. Barger, M. Barnett, A. Bartl, M. Battaglia, P. Bechtle, G. Belanger, A. Belyaev, E. L. Berger, G. Blair, E. Boos, M. Carena, S. Y. Choi, F. Deppisch, A. De Roeck, K. Desch, M. A. Diaz, A. Djouadi, B. Dutta, S. Dutta, H. Eberl, J. Ellis, J. Erler, H. Fraas, A. Freitas, T. Fritzsche, R. M. Godbole, G. J. Gounaris, J. Guasch, J. Gunion, N. Haba, H. E. Haber, K. Hagiwara, L. Han, T. Han, H. -J. He, S. Heinemeyer, S. Hesselbach, K. Hidaka, I. Hinchliffe, M. Hirsch, K. Hohenwarter-Sodek, W. Hollik, W. S. Hou, T. Hurth, I. Jack, Y. Jiang, D. R. T. Jones, J. Kalinowski, T. Kamon, G. Kane, S. K. Kang, T. Kernreiter, W. Kilian, C. S. Kim, S. F. King, O. Kittel, M. Klasen, J. -L. Kneur, K. Kovarik, M. Kramer, S. Kraml, R. Lafaye, P. Langacker, H. E. Logan, W. -G. Ma, W. Majerotto, H. -U. Martyn, K. Matchev, D. J. Miller, M. Mondragon, G. Moortgat-Pick, S. Moretti, T. Mori, G. Moultaka, S. Muanza, M. M. Muhlleitner, B. Mukhopadhyaya, U. Nauenberg, M. M. Nojiri, D. Nomura, H. Nowak, N. Okada, K. A. Olive, W. Oller, M. Peskin, T. Plehn, G. Polesello, W. Porod, F. Quevedo, D. Rainwater, J. Reuter, P. Richardson, K. Rolbiecki, P. Roy, R. Ruckl, H. Rzehak, P. Schleper, K. Siyeon, P. Skands, P. Slavich, D. Stockinger, P. Sphicas, M. Spira, T. Tait, D. R. Tovey, J. W. F. Valle, C. E. M. Wagner, Ch. Weber, G. Weiglein, P. Wienemann, Z. -Z. Xing, Y. Yamada, J. M. Yang, D. Zerwas, P. M. Zerwas, R. -Y. Zhang, X. Zhang, S. -H. Zhu

High-precision analyses of supersymmetry parameters aim at reconstructing the fundamental supersymmetric theory and its breaking mechanism. A well defined theoretical framework is needed when higher-order corrections are included. We propose such a scheme, Supersymmetry Parameter Analysis SPA, based on a consistent set of conventions and input parameters. Read More

2004Oct
Authors: LHC/LC Study Group, :, G. Weiglein, T. Barklow, E. Boos, A. De Roeck, K. Desch, F. Gianotti, R. Godbole, J. F. Gunion, H. E. Haber, S. Heinemeyer, J. L. Hewett, K. Kawagoe, K. Monig, M. M. Nojiri, G. Polesello, F. Richard, S. Riemann, W. J. Stirling, A. G. Akeroyd, B. C. Allanach, D. Asner, S. Asztalos, H. Baer, M. Battaglia, U. Baur, P. Bechtle, G. Belanger, A. Belyaev, E. L. Berger, T. Binoth, G. A. Blair, S. Boogert, F. Boudjema, D. Bourilkov, W. Buchmuller, V. Bunichev, G. Cerminara, M. Chiorboli, H. Davoudiasl, S. Dawson, S. De Curtis, F. Deppisch, M. A. Diaz, M. Dittmar, A. Djouadi, D. Dominici, U. Ellwanger, J. L. Feng, I. F. Ginzburg, A. Giolo-Nicollerat, B. K. Gjelsten, S. Godfrey, D. Grellscheid, J. Gronberg, E. Gross, J. Guasch, K. Hamaguchi, T. Han, J. Hisano, W. Hollik, C. Hugonie, T. Hurth, J. Jiang, A. Juste, J. Kalinowski, W. Kilian, R. Kinnunen, S. Kraml, M. Krawczyk, A. Krokhotine, T. Krupovnickas, R. Lafaye, S. Lehti, H. E. Logan, E. Lytken, V. Martin, H. -U. Martyn, D. J. Miller, S. Moretti, F. Moortgat, G. Moortgat-Pick, M. Muhlleitner, P. Niezurawski, A. Nikitenko, L. H. Orr, P. Osland, A. F. Osorio, H. Pas, T. Plehn, W. Porod, A. Pukhov, F. Quevedo, D. Rainwater, M. Ratz, A. Redelbach, L. Reina, T. Rizzo, R. Ruckl, H. J. Schreiber, M. Schumacher, A. Sherstnev, S. Slabospitsky, J. Sola, A. Sopczak, M. Spira, M. Spiropulu, Z. Sullivan, M. Szleper, T. M. P. Tait, X. Tata, D. R. Tovey, A. Tricomi, M. Velasco, D. Wackeroth, C. E. M. Wagner, S. Weinzierl, P. Wienemann, T. Yanagida, A. F. Zarnecki, D. Zerwas, P. M. Zerwas, L. Zivkovic

Physics at the Large Hadron Collider (LHC) and the International e+e- Linear Collider (ILC) will be complementary in many respects, as has been demonstrated at previous generations of hadron and lepton colliders. This report addresses the possible interplay between the LHC and ILC in testing the Standard Model and in discovering and determining the origin of new physics. Mutual benefits for the physics programme at both machines can occur both at the level of a combined interpretation of Hadron Collider and Linear Collider data and at the level of combined analyses of the data, where results obtained at one machine can directly influence the way analyses are carried out at the other machine. Read More

We propose a new mass reconstruction technique for SUSY processes at the LHC. The idea is to completely solve the kinematics of the SUSY cascade decay by using the assumption that the selected events satisfy the same mass shell conditions of the sparticles involved in the cascade decay. Using this technique, we study the measurement of the mass of the bottom squarks in the cascade decay of the gluino. Read More

We present a case study for the synergy of combined LHC and LC analyses in Susy searches in which simultaneous running of both machines is very important. In this study only light non-coloured Susy particles are accessible at a Linear Collider with an initial energy of $\sqrt{s}=500$ GeV. Nevertheless the precise analysis at the LC leads to an accurate Susy parameter determination and prediction of heavy Susy particles. Read More

Coherent analyses at future LHC and LC experiments can be used to explore the breaking mechanism of supersymmetry and to reconstruct the fundamental theory at high energies, in particular at the grand unification scale. This will be exemplified for minimal supergravity. Read More

Supersymmetry analyses will potentially be a central area for experiments at the LHC and at a future e+ e- linear collider. Results from the two facilities will mutually complement and augment each other so that a comprehensive and precise picture of the supersymmetric world can be developed. We will demonstrate in this report how coherent analyses at LHC and LC experiments can be used to explore the breaking mechanism of supersymmetry and to reconstruct the fundamental theory at high energies, in particular at the grand unification scale. Read More

In the event that R-Parity conserving supersymmetry (SUSY) is discovered at the LHC, a key issue which will need to be addressed will be the consistency of that signal with astrophysical and non-accelerator constraints on SUSY Dark Matter. This issue is studied for the SPS1a mSUGRA benchmark model by using measurements of end-points and thresholds in the invariant mass spectra of various combinations of leptons and jets in ATLAS to constrain the model parameters. These constraints are then used to assess the statistical accuracy with which quantities such as the Dark Matter relic density and direct detection cross-section can be measured. Read More

The work contained herein constitutes a report of the ``Beyond the Standard Model'' working group for the Workshop "Physics at TeV Colliders", Les Houches, France, 26 May--6 June, 2003. The research presented is original, and was performed specifically for the workshop. Tools for calculations in the minimal supersymmetric standard model are presented, including a comparison of the dark matter relic density predicted by public codes. Read More

We discuss possible searches for the new particles predicted by Little Higgs Models at the LHC. By using a simulation of the ATLAS detector, we demonstrate how the predicted quark, gauge bosons and additional Higgs bosons can be found and estimate the mass range over which their properties can be constrained. Read More

When several sparticle masses are known, the kinematics of SUSY decay processes observed at the LHC can be solved if the cascade decays contain sufficient steps. We demonstrate four examples of this full reconstruction technique applied to channels involving leptons, namely a) gluino mass determination, b) sbottom mass determination, c) LSP momentum reconstruction, and d) heavy higgs mass determination. Read More

Results are presented of a feasibility study of techniques for measuring the mass of the lightest chargino at the CERN LHC. These results suggest that for one particular mSUGRA model a statistically significant chargino signal can be identified and the chargino mass reconstructed with a precision of order 11% for of order 100 fb-1 of data. Read More

We demonstrate how the interplay of a future e^+e^- LC at its first stage with sqrt{s} sim 500 GeV and of the LHC could lead to a precise determination of the fundamental SUSY parameters in the gaugino/higgsino sector without assuming a specific supersymmetry breaking scheme. We demonstrate this for the benchmark scenario SPS1a, taking into account realistic errors for the masses and cross sections measured at the LC with polarised beams, including errors coming from polarisation measurements, and mass measurements at the LHC. The results clearly demonstrate the complementarity of the LHC and LC, and the benefit from the joint analyses of their data. Read More

We revisit the issue of probing R-violating couplings of supersymmetric theories at hadronic colliders, particularly at the LHC. Concentrating on dimuon production, an evaluation of the optimal sensitivity to the R-violating coupling is performed through a maximum likelihood analysis. The measurement uncertainties are evaluated through a study of fully generated events processed through a fast simulation of the ATLAS detector. Read More

We determine new constraints on the products of two R-parity violating coupling constants from the NOMAD and CHORUS experiments on nu_mu --> nu_tau oscillations. We obtain improved results from (a) lepton flavour violating (LFV) meson decays, (b) LFV deep-inelastic scattering and (c) a combination of the two. Read More

The impact on the physics capabilities of the ATLAS detector of possible LHC upgrades is discussed. As a benchmark, an increase in the luminosity by a factor of ten is considered. For comparison, a doubling of the LHC energy is also explored. Read More

Investigating leptonic decays of pi^-, K^-, B^-, pi^0, K_L^0, B_s^0 we present new bounds on some products of two R-parity violating coupling constants. For mesons of a similar structure but so far poor experimental data we give the corresponding formulae, to be used in the future. Read More

2000Dec
Affiliations: 1CERN, 2INFN Roma, 3INFN Roma, 4U.Roma "La Sapienza", 5INFN Pavia, 6INFN Pavia, 7U.Roma "La Sapienza"

We draw a possible scenario for the observation of massive long-lived charged particles at the LHC detector ATLAS. The required flexibility of the detector triggers and of the identification and reconstruction systems are discussed. As an example, we focus on the measurement of the mass and lifetime of long-lived charged sleptons predicted in the framework of supersymmetric models with gauge-mediated supersymmetry (SUSY) breaking. Read More

We report a study on the measurement of the SUSY breaking scale sqrt(F) in the framework of gauge-mediated supersymmetry breaking (GMSB) models at the LHC. The work is focused on the GMSB scenario where a stau is the next-to-lightest SUSY particle (NLSP) and decays into a gravitino with lifetime c*tau_NLSP in the range 0.5 m to 1 km. Read More

The results obtained by the Working Group on Supersymmetry at the 1999 Les Houches Workshop on Collider Physics are summarized. Separate chapters treat "general" supersymmetry, R-parity violation, gauge mediated supersymmetry breaking, and anomaly mediated supersymmetry breaking. Read More

The resonant production of sneutrinos at the LHC via the R-parity violating couplings $\l '_{ijk} L_i Q_j D^c_k$ is studied through its three-leptons signature. A detailed particle level study of signal and background is performed using a fast simulation of the ATLAS detector. Through the full reconstruction of the cascade decay, a model-independent and precise measurement of the masses of the involved sparticles can be performed. Read More

The status of two on-going studies concerning important aspects of the phenomenology of gauge-mediated supersymmetry breaking (GMSB) models at TeV colliders is reported. The first study deals with the characteristics of the light Higgs boson spectrum allowed by the (minimal and non-minimal) GMSB framework. Today's most accurate GMSB model generation and two-loop Feynman-diagrammatic calculation of m_h have been combined. Read More

The resonant production of sneutrinos at the LHC via the R-parity violating couplings $\l '_{ijk} L_i Q_j D^c_k$ is studied through its three-leptons signature. A detailed particle level study of signal and background is performed using a fast simulation of the ATLAS detector. Through the full reconstruction of the cascade decay, a model-independent and precise measurement of the masses of the involved sparticles can be performed. Read More

We investigate the potential of the LHC to probe the R parity violating couplings involving the third generation by considering single top production. This study is based on particle level event generation for both signal and background, interfaced to a simplified simulation of the ATLAS detector. Read More