S. Hoche

S. Hoche
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S. Hoche
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High Energy Physics - Phenomenology (19)
 
High Energy Physics - Experiment (3)
 
Mathematics - Operator Algebras (1)
 
Mathematics - Group Theory (1)
 
Mathematics - Functional Analysis (1)
 
Mathematics - Quantum Algebra (1)

Publications Authored By S. Hoche

The lattice of subgroups of a group is the subject of numerous results revolving around the central theme of decomposing the group into "chunks" (subquotients) that can then be compared to one another in various ways. Examples of results in this class would be the Noether isomorphism theorems, Zassenhaus' butterfly lemma, the Schreier refinement theorem for subnormal series of subgroups, the Dedekind modularity law, and last but not least the Jordan-H\"older theorem. We discuss analogues of the above-mentioned results in the context of locally compact quantum groups and linearly reductive quantum groups. Read More

We present theoretical predictions for the production of top-quark pairs with up to three jets at the next-to leading order in perturbative QCD. The relevant calculations are performed with Sherpa and OpenLoops. To address the issue of scale choices and related uncertainties in the presence of multiple scales, we compare results obtained with the standard scale HT/2 at fixed order and the MINLO procedure. Read More

This Report summarizes the proceedings of the 2015 Les Houches workshop on Physics at TeV Colliders. Session 1 dealt with (I) new developments relevant for high precision Standard Model calculations, (II) the new PDF4LHC parton distributions, (III) issues in the theoretical description of the production of Standard Model Higgs bosons and how to relate experimental measurements, (IV) a host of phenomenological studies essential for comparing LHC data from Run I with theoretical predictions and projections for future measurements in Run II, and (V) new developments in Monte Carlo event generators. Read More

We present a new parton-shower algorithm. Borrowing from the basic ideas of dipole cascades, the evolution variable is judiciously chosen as the transverse momentum in the soft limit. This leads to a very simple analytic structure of the evolution. Read More

We present a fully automated framework as part of the Sherpa event generator for the computation of tree-level cross sections in beyond Standard Model scenarios, making use of model information given in the Universal FeynRules Output format. Elementary vertices are implemented into C++ code automatically and provided to the matrix-element generator Comix at runtime. Widths and branching ratios for unstable particles are computed from the same building blocks. Read More

This lecture discusses the physics implemented by Monte Carlo event generators for hadron colliders. It details the construction of parton showers and the matching of parton showers to fixed-order calculations at higher orders in perturbative QCD. It also discusses approaches to merge calculations for a varying number of jets, the interface to the underlying event and hadronization. Read More

We discuss how the UN2LOPS scheme for matching NNLO calculations to parton showers can be applied to processes with large higher-order perturbative QCD corrections. We focus on Higgs-boson production through gluon fusion as an example. We also present an NNLO fixed-order event generator for this reaction. Read More

In this contribution, we present an intermediate storage format for next-to-leading order (NLO) events and explain the advantages of presenting a NLO calculation in this format. We also present some recent applications, including the calculation of PDF uncertainties and the combination of different multiplicity samples for the prediction of gap fractions in inclusive dijet events. Read More

We present differential cross sections for the production of top-quark pairs in conjunction with up to two jets, computed at next-to leading order in perturbative QCD and consistently merged with a parton shower in the Sherpa+OpenLoops framework. Top quark decays including spin correlation effects are taken into account at leading order accuracy. The calculation yields a unified description of top-pair plus multi-jet production, and detailed results are presented for various key observables at the Large Hadron Collider. Read More

In these proceedings we present results from a recent calculation for the production of a W boson in conjunction with five jets at next-to-leading order in perturbative QCD. We also use results at lower multiplicities to extrapolate the cross section to the same process with six jets. Read More

2013Jul
Authors: The LHC Higgs Cross Section Working Group, S. Heinemeyer1, C. Mariotti2, G. Passarino3, R. Tanaka4, J. R. Andersen, P. Artoisenet, E. A. Bagnaschi, A. Banfi, T. Becher, F. U. Bernlochner, S. Bolognesi, P. Bolzoni, R. Boughezal, D. Buarque, J. Campbell, F. Caola, M. Carena, F. Cascioli, N. Chanon, T. Cheng, S. Y. Choi, A. David, P. de Aquino, G. Degrassi, D. Del Re, A. Denner, H. van Deurzen, S. Diglio, B. Di Micco, R. Di Nardo, S. Dittmaier, M. Duhrssen, R. K. Ellis, G. Ferrera, N. Fidanza, M. Flechl, D. de Florian, S. Forte, R. Frederix, S. Frixione, S. Gangal, Y. Gao, M. V. Garzelli, D. Gillberg, P. Govoni, M. Grazzini, N. Greiner, J. Griffiths, A . V. Gritsan, C. Grojean, D. C. Hall, C. Hays, R. Harlander, R. Hernandez-Pinto, S. Hoche, J. Huston, T. Jubb, M. Kadastik, S. Kallweit, A. Kardos, L. Kashif, N. Kauer, H. Kim, R. Klees, M. Kramer, F. Krauss, A. Laureys, S. Laurila, S. Lehti, Q. Li, S. Liebler, X. Liu, H. E. Logan, G. Luisoni, M. Malberti, F. Maltoni, K. Mawatari, F. Maierhofer, H. Mantler, S. Martin, P. Mastrolia, O. Mattelaer, J. Mazzitelli, B. Mellado, K. Melnikov, P. Meridiani, D. J. Miller, E. Mirabella, S. O. Moch, P. Monni, N. Moretti, A. Muck, M. Muhlleitner, P. Musella, P. Nason, C. Neu, M. Neubert, C. Oleari, J. Olsen, G. Ossola, T. Peraro, K. Peters, F. Petriello, G. Piacquadio, C. T. Potter, S. Pozzorini, K. Prokofiev, I. Puljak, M. Rauch, D. Rebuzzi, L. Reina, R. Rietkerk, A. Rizzi, Y. Rotstein-Habarnau, G. P. Salam, G. Sborlini, F. Schissler, M. Schonherr, M. Schulze, M. Schumacher, F. Siegert, P. Slavich, J. M. Smillie, O. Stal, J. F. von Soden-Fraunhofen, M. Spira, I. W. Stewart, F. J. Tackmann, P. T. E. Taylor, D. Tommasini, J. Thompson, R. S. Thorne, P. Torrielli, F. Tramontano, N. V. Tran, Z. Trocsanyi, M. Ubiali, P. Vanlaer, M. Vazquez Acosta, T. Vickey, A. Vicini, W. J. Waalewijn, D. Wackeroth, C. Wagner, J. R. Walsh, J. Wang, G. Weiglein, A. Whitbeck, C. Williams, J. Yu, G. Zanderighi, M. Zanetti, M. Zaro, P. M. Zerwas, C. Zhang, T. J . E. Zirke, S. Zuberi
Affiliations: 1eds., 2eds., 3eds., 4eds.

This Report summarizes the results of the activities in 2012 and the first half of 2013 of the LHC Higgs Cross Section Working Group. 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. This report follows the first working group report Handbook of LHC Higgs Cross Sections: 1. Read More

2012Jan
Authors: LHC Higgs Cross Section Working Group, S. Dittmaier1, C. Mariotti2, G. Passarino3, R. Tanaka4, S. Alekhin, J. Alwall, E. A. Bagnaschi, A. Banfi, J. Blumlein, S. Bolognesi, N. Chanon, T. Cheng, L. Cieri, A. M. Cooper-Sarkar, M. Cutajar, S. Dawson, G. Davies, N. De Filippis, G. Degrassi, A. Denner, D. D'Enterria, S. Diglio, B. Di Micco, R. Di Nardo, R. K. Ellis, A. Farilla, S. Farrington, M. Felcini, G. Ferrera, M. Flechl, D. de Florian, S. Forte, S. Ganjour, M. V. Garzelli, S. Gascon-Shotkin, S. Glazov, S. Goria, M. Grazzini, J. -Ph. Guillet, C. Hackstein, K. Hamilton, R. Harlander, M. Hauru, S. Heinemeyer, S. Hoche, J. Huston, C. Jackson, P. Jimenez-Delgado, M. D. Jorgensen, M. Kado, S. Kallweit, A. Kardos, N. Kauer, H. Kim, M. Kovac, M. Kramer, F. Krauss, C. -M. Kuo, S. Lehti, Q. Li, N. Lorenzo, F. Maltoni, B. Mellado, S. O. Moch, A. Muck, M. Muhlleitner, P. Nadolsky, P. Nason, C. Neu, A. Nikitenko, C. Oleari, J. Olsen, S. Palmer, S. Paganis, C. G. Papadopoulos, T . C. Petersen, F. Petriello, F. Petrucci, G. Piacquadio, E. Pilon, C. T. Potter, J. Price, I. Puljak, W. Quayle, V. Radescu, D. Rebuzzi, L. Reina, J. Rojo, D. Rosco, G. P. Salam, A. Sapronov, J. Schaarschmidt, M. Schonherr, M. Schumacher, F. Siegert, P. Slavich, M. Spira, I. W. Stewart, W. J. Stirling, F. Stockli, C. Sturm, F. J. Tackmann, R. S. Thorne, D. Tommasini, P. Torrielli, F. Tramontano, Z. Trocsanyi, M. Ubiali, S. Uccirati, M. Vazquez Acosta, T. Vickey, A. Vicini, W. J. Waalewijn, D. Wackeroth, M. Warsinsky, M. Weber, M. Wiesemann, G. Weiglein, J. Yu, G. Zanderighi
Affiliations: 1eds., 2eds., 3eds., 4eds.

This Report summarises the results of the second year's activities of the LHC Higgs Cross Section Working Group. 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 working group report Handbook of LHC Higgs Cross Sections: 1. Read More

We review the physics basis, main features and use of general-purpose Monte Carlo event generators for the simulation of proton-proton collisions at the Large Hadron Collider. Topics included are: the generation of hard-scattering matrix elements for processes of interest, at both leading and next-to-leading QCD perturbative order; their matching to approximate treatments of higher orders based on the showering approximation; the parton and dipole shower formulations; parton distribution functions for event generators; non-perturbative aspects such as soft QCD collisions, the underlying event and diffractive processes; the string and cluster models for hadron formation; the treatment of hadron and tau decays; the inclusion of QED radiation and beyond-Standard-Model processes. We describe the principal features of the ARIADNE, Herwig++, PYTHIA 8 and SHERPA generators, together with the Rivet and Professor validation and tuning tools, and discuss the physics philosophy behind the proper use of these generators and tools. Read More

Many highly developed Monte Carlo tools for the evaluation of cross sections based on tree matrix elements exist and are used by experimental collaborations in high energy physics. As the evaluation of one-loop matrix elements has recently been undergoing enormous progress, the combination of one-loop matrix elements with existing Monte Carlo tools is on the horizon. This would lead to phenomenological predictions at the next-to-leading order level. Read More

We extend the multi-purpose Monte-Carlo event generator Sherpa to include processes in deeply inelastic lepton-nucleon scattering. Hadronic final states in this kinematical setting are characterised by the presence of multiple kinematical scales, which were up to now accounted for only by specific resummations in individual kinematical regions. Using an extension of the recently introduced method for merging truncated parton showers with higher-order tree-level matrix elements, it is possible to obtain predictions which are reliable in all kinematical limits. Read More

Phenomenological implications of a minimal extension to the Standard Model are considered, in which a Nambu-Goldstone boson emerges from the spontaneous breaking of a global U(1) symmetry. This is felt only by a scalar field which is a singlet under all Standard Model symmetries, and possibly by neutrinos. Mixing between the Standard Model Higgs boson field and the new singlet field may lead to predominantly invisible Higgs boson decays. Read More

2007May
Affiliations: 1Durham University, 2Durham University, 3University of Liverpool

A Markovian Monte Carlo algorithm for multi-parton production in the high-energy limit is proposed and the matching with unintegrated parton densities is discussed. Read More

2006Jan
Authors: S. Alekhin, G. Altarelli, N. Amapane, J. Andersen, V. Andreev, M. Arneodo, V. Avati, J. Baines, R. D. Ball, A. Banfi, S. P. Baranov, J. Bartels, O. Behnke, R. Bellan, J. Blumlein, H. Bottcher, S. Bolognesi, M. Boonekamp, D. Bourilkov, J. Bracinik, A. Bruni, G. Bruni, A. Buckley, A. Bunyatyan, C. M. Buttar, J. M. Butterworth, S. Butterworth, M. Cacciari, T. Carli, G. Cerminara, S. Chekanov, M. Ciafaloni, D. Colferai, J. Collins, A. Cooper-Sarkar, G. Corcella, M. Corradi, B. E. Cox, R. Croft, Z. Czyczula, A. Dainese, M. Dasgupta, G. Davatz, L. Del Debbio, Y. Delenda, A. De Roeck, M. Diehl, S. Diglio, G. Dissertori, M. Dittmar, J. Ellis, K. J. Eskola, T. O. Eynck, J. Feltesse, F. Ferro, R. D. Field, J. Forshaw, S. Forte, A. Geiser, S. Gieseke, A. Glazov, T. Gleisberg, P. Golonka, E. Gotsman, G. Grindhammer, M. Grothe, C. Group, M. Groys, A. Guffanti, G. Gustafson, C. Gwenlan, S. Hoche, C. Hogg, J. Huston, G. Iacobucci, G. Ingelman, S. Jadach, H. Jung, J. Kalliopuska, M. Kapishin, B. Kersevan, V. Khoze, M. Klasen, M. Klein, B. A. Kniehl, V. J. Kolhinen, H. Kowalski, G. Kramer, F. Krauss, S. Kretzer, K. Kutak, J. W. Lamsa, L. Lonnblad, T. Lastovicka, G. Lastovicka-Medin, E. Laenen, Th. Lagouri, J. I. Latorre, N. Lavesson, V. Lendermann, E. Levin, A. Levy, A. V. Lipatov, M. Lublinsky, L. Lytkin, T. Maki, L. Magnea, F. Maltoni, M. Mangano, U. Maor, C. Mariotti, N. Marola, A. D. Martin, A. Meyer, S. Moch, J. Monk, A. Moraes, A. Morsch, L. Motyka, E. Naftali, P. Newman, A. Nikitenko, F. Oljemark, R. Orava, M. Ottela, K. Osterberg, K. Peters, F. Petrucci, A. Piccione, A. Pilkington, K. Piotrzkowski, O. I. Piskounova, A. Proskuryakov, A. Prygarin, J. Pumplin, K. Rabbertz, R. Ranieri, V. Ravindran, B. Reisert, E. Richter-Was, L. Rinaldi, P. Robbe, E. Rodrigues, J. Rojo, H. Ruiz, M. Ruspa, M. G. Ryskin, A. Sabio Vera, G. P. Salam, A. Schalicke, S. Schatzel, T. Schorner-Sadenius, I. Schienbein, F-P. Schilling, S. Schumann, M. H. Seymour, F. Siegert, T. Sjostrand, M. Skrzypek, J. Smith, M. Smizanska, H. Spiesberger, F. Schrempp, A. Stasto, H. Stenzel, W. J. Stirling, P. Szczypka, S. Tapprogge, C. Targett-Adams, M. Tasevsky, T. Teubner, R. S. Thorne, A. Tonazzo, A. Tricoli, N. Tuning, J. Turnau, U. Uwer, P. Van Mechelen, R. Venugopalan, M. Verducci, J. A. M. Vermaseren, A. Vogt, R. Vogt, B. F. L. Ward, Z. Was, G. Watt, B. M. Waugh, C. Weiser, M. R. Whalley, M. Wing, J. Winter, S. A. Yost, G. Zanderighi, N. P. Zotov

The HERA electron--proton collider has collected 100 pb$^{-1}$ of data since its start-up in 1992, and recently moved into a high-luminosity operation mode, with upgraded detectors, aiming to increase the total integrated luminosity per experiment to more than 500 pb$^{-1}$. HERA has been a machine of excellence for the study of QCD and the structure of the proton. The Large Hadron Collider (LHC), which will collide protons with a centre-of-mass energy of 14 TeV, will be completed at CERN in 2007. Read More

2006Jan
Authors: S. Alekhin, G. Altarelli, N. Amapane, J. Andersen, V. Andreev, M. Arneodo, V. Avati, J. Baines, R. D. Ball, A. Banfi, S. P. Baranov, J. Bartels, O. Behnke, R. Bellan, J. Blumlein, H. Bottcher, S. Bolognesi, M. Boonekamp, D. Bourilkov, J. Bracinik, A. Bruni, G. Bruni, A. Buckley, A. Bunyatyan, C. M. Buttar, J. M. Butterworth, S. Butterworth, M. Cacciari, T. Carli, G. Cerminara, S. Chekanov, M. Ciafaloni, D. Colferai, J. Collins, A. Cooper-Sarkar, G. Corcella, M. Corradi, B. E. Cox, R. Croft, Z. Czyczula, A. Dainese, M. Dasgupta, G. Davatz, L. Del Debbio, Y. Delenda, A. De Roeck, M. Diehl, S. Diglio, G. Dissertori, M. Dittmar, J. Ellis, K. J. Eskola, T. O. Eynck, J. Feltesse, F. Ferro, R. D. Field, J. Forshaw, S. Forte, A. Geiser, S. Gieseke, A. Glazov, T. Gleisberg, P. Golonka, E. Gotsman, G. Grindhammer, M. Grothe, C. Group, M. Groys, A. Guffanti, G. Gustafson, C. Gwenlan, S. Hoche, C. Hogg, J. Huston, G. Iacobucci, G. Ingelman, S. Jadach, H. Jung, J. Kalliopuska, M. Kapishin, B. Kersevan, V. Khoze, M. Klasen, M. Klein, B. A. Kniehl, V. J. Kolhinen, H. Kowalski, G. Kramer, F. Krauss, S. Kretzer, K. Kutak, J. W. Lamsa, L. Lonnblad, T. Lastovicka, G. Lastovicka-Medin, E. Laenen, Th. Lagouri, J. I. Latorre, N. Lavesson, V. Lendermann, E. Levin, A. Levy, A. V. Lipatov, M. Lublinsky, L. Lytkin, T. Maki, L. Magnea, F. Maltoni, M. Mangano, U. Maor, C. Mariotti, N. Marola, A. D. Martin, A. Meyer, S. Moch, J. Monk, A. Moraes, A. Morsch, L. Motyka, E. Naftali, P. Newman, A. Nikitenko, F. Oljemark, R. Orava, M. Ottela, K. Osterberg, K. Peters, F. Petrucci, A. Piccione, A. Pilkington, K. Piotrzkowski, O. I. Piskounova, A. Proskuryakov, A. Prygarin, J. Pumplin, K. Rabbertz, R. Ranieri, V. Ravindran, B. Reisert, E. Richter-Was, L. Rinaldi, P. Robbe, E. Rodrigues, J. Rojo, H. Ruiz, M. Ruspa, M. G. Ryskin, A. Sabio Vera, G. P. Salam, A. Schalicke, S. Schatzel, T. Schorner-Sadenius, I. Schienbein, F-P. Schilling, S. Schumann, M. H. Seymour, F. Siegert, T. Sjostrand, M. Skrzypek, J. Smith, M. Smizanska, H. Spiesberger, F. Schrempp, A. Stasto, H. Stenzel, W. J. Stirling, P. Szczypka, S. Tapprogge, C. Targett-Adams, M. Tasevsky, T. Teubner, R. S. Thorne, A. Tonazzo, A. Tricoli, N. Tuning, J. Turnau, U. Uwer, P. Van Mechelen, R. Venugopalan, M. Verducci, J. A. M. Vermaseren, A. Vogt, R. Vogt, B. F. L. Ward, Z. Was, G. Watt, B. M. Waugh, C. Weiser, M. R. Whalley, M. Wing, J. Winter, S. A. Yost, G. Zanderighi, N. P. Zotov

The HERA electron--proton collider has collected 100 pb$^{-1}$ of data since its start-up in 1992, and recently moved into a high-luminosity operation mode, with upgraded detectors, aiming to increase the total integrated luminosity per experiment to more than 500 pb$^{-1}$. HERA has been a machine of excellence for the study of QCD and the structure of the proton. The Large Hadron Collider (LHC), which will collide protons with a centre-of-mass energy of 14 TeV, will be completed at CERN in 2007. Read More