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THE BEYOND the STANDARD MODEL WORKING GROUP: Summary Report

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THE BEYOND the STANDARD MODEL WORKING GROUP: Summary Report UCD-2002-05, SLAC-PUB-9183, UFIFT-HEP-02-11, BNL-HET-02/10 THE BEYOND THE STANDARD MODEL WORKING GROUP: Summary Report Conveners: G. AZUELOS1 , J. GUNION2 , J. HEWETT3 , G. LANDSBERG4 , K. MATCHEV5 , F. PAIGE6 , T. RIZZO3 , L. RURUA7 Additional Contributors: S. ABDULLIN8 , A. ALBERT9, B. ALLANACH10 , T. BLAZEK11 , D. CAVALLI12 , F. CHARLES9 , K. CHEUNG13 , A. DEDES14, S. DIMOPOULOS15 , H. DREINER14 , U. ELLWANGER16 , D.S. GORBUNOV17 , S. HEINEMEYER6 , I. HINCHLIFFE18 , C. HUGONIE19 , S. MORETTI10;19, G. POLESELLO20 , H. PRZYSIEZNIAK21 , P. RICHARDSON22 , L. VACAVANT18 , G. WEIGLEIN19 Additional Working Group Members: S. ASAI7, C. BALAZS23 , M. BATTAGLIA7 , G. BELANGER21 , E. BOOS24 , F. BOUDJEMA21 , H.-C. CHENG25 , A. DATTA26, A. DJOUADI26 , F. DONATO21 , R. GODBOLE27 , V. KABACHENKO28 , M. KAZAMA29 , Y. MAMBRINI26 , A. MIAGKOV7 , S. MRENNA30 , P. PANDITA31 , P. PERRODO21 , L. POGGIOLI21 , C. QUIGG30, M. SPIRA32 , A. STRUMIA10 , D. TOVEY33 , B. WEBBER34 Affiliations: 1 Department of Physics, University of Montreal and TRIUMF, Canada. 2 Department of Physics, University of California at Davis, Davis, CA, USA. 3 Stanford Linear Accelerator Center, Stanford University, Stanford, CA, USA. 4 Department of Physics, Brown University, Providence, RI, USA. 5 Department of Physics, University of Florida, Gainesville, FL, USA. 6 Brookhaven National Laboratory, Upton, NY, USA. 7 EP Division, CERN, CH–1211 Geneva 23, Switzerland. 8 I.T.E.P., Moscow, Russia. 9 Groupe de Recherches en Physique des Hautes Energies, Universite´ de Haute Alsace, Mulhouse, France. 10 TH Division, CERN, CH–1211 Geneva 23, Switzerland. 11 Department of Physics and Astronomy, University of Southampton, Southampton, UK. 12 INFN, Milano, Italy. 13 National Center for Theoretical Science, National Tsing Hua University, Hsinchu, Taiwan. 14 Physikalisches Institut der Universitat¨ Bonn, Bonn, Germany. 15 Physics Department, Stanford University, Stanford, CA, USA. 16 Universite´ de Paris XI, Orsay, Cedex, France. 17 Institute for Nuclear Research of the Russian Academy of Sciences, Moscow, Russia. 18 Lawrence Berkeley National Laboratory, Berkeley, CA, USA. 19 Institute for Particle Physics Phenomenology, University of Durham, Durham, UK. 20 INFN, Sezione di Pavia, Pavia, Italy. 21 LAPP, Annecy, France. Work supported in part by the Department of Energy contract DE-AC03-76SF00515. 2 22 DAMTP, Centre for Mathematical Sciences and Cavendish Laboratory, Cambridge, UK. 23 Department of Physics, University of Hawaii, Honolulu, HI, USA. 24 INP, Moscow State University, Russia. 25 Department of Physics, University of Chicago, Chicago, IL, USA. 26 Lab de Physique Mathematique, Univ. de Montpellier II, Montpellier, Cedex, France. 27 Center for Theoretical Studies, Indian Inst. of Science, Bangalore, Karnataka, India. 28 IHEP, Moscow, Russia. 29 Warsaw University, Warsaw, Poland. 30 Fermilab, Batavia, IL, USA. 31 Physics Dept., North-Eastern Hill Univ, HEHU Campus, Shillong, India. 32 Paul Scherrer Institute, Villigen PSI, Switzerland. 33 Dept. of Physics and Astronomy, Univ. of Sheffield, Sheffield, UK. 34 Cavendish Laboratory, Cambridge, UK. Report of the “Beyond the Standard Model” working group for the Workshop “Physics at TeV Colliders”, Les Houches, France, 21 May – 1 June 2001. Contents I Preface 5 II Theoretical Developments J. Gunion, J. Hewett, K. Matchev, T. Rizzo 7 III FeynSSG v.1.0: Numerical Calculation of the mSUGRA and Higgs spectrum A. Dedes, S. Heinemeyer, G. Weiglein 14 IV Theoretical Uncertainties in Sparticle Mass Predictions and SOFTSUSY B.C. Allanach 18 V High-Mass Supersymmetry with High Energy Hadron Colliders I. Hinchliffe and F.E. Paige 24 VI SUSY with Heavy Scalars at LHC I. Hinchliffe and F.E. Paige 33 3 VII Inclusive study of MSSM in CMS S. Abdullin, A. Albert, F. Charles 41 VIII Establishing a No-Lose Theorem for NMSSM Higgs Boson Discovery at the LHC U. Ellwanger, J.F. Gunion, C. Hugonie 58 IX Effects of Supersymmetric Phases on Higgs Production in Association with Squark Pairs in the Minimal Supersymmetric Standard Model A. Dedes, S. Moretti 69 X Study of the Lepton Flavor Violating Decays of Charged Fermions in SUSY GUTs T. Blazekˇ 74 XI Interactions of the Goldstino Supermultiplet with Standard Model Fields D.S. Gorbunov 76 XII Attempts at Explaining the NuTeV Observation of Di-Muon Events A. Dedes, H. Dreiner, and P. Richardson 81 XIII Kaluza-Klein States of the Standard Model Gauge Bosons: Constraints From High Energy Experiments K. Cheung and G. Landsberg 83 XIV Kaluza-Klein Excitations of Gauge Bosons in the ATLAS Detector G. Azuelos and G. Polesello 90 XV Search for the Randall Sundrum Radion Using the ATLAS Detector G. Azuelos, D. Cavalli, H. Przysiezniak, L. Vacavant 109 4 XVI Radion Mixing Effects on the Properties of the Standard Model Higgs Boson J.L.Hewett and T.G. Rizzo 121 XVII Probing Universal Extra Dimensions at Present and Future Colliders Thomas G. Rizzo 125 XVIII Black Hole Production at Future Colliders S. Dimopoulos and G. Landsberg 132 5 Part I Preface In this working group we have investigated a number of aspects of searches for new physics beyond the Standard Model (SM) at the running or planned TeV-scale colliders. For the most part, we have considered hadron colliders, as they will define particle physics at the energy frontier for the next ten years at least. The variety of models for Beyond the Standard Model (BSM) physics has grown immensely. It is clear that only future experiments can provide the needed direction to clarify the correct theory. Thus, our focus has been on exploring the extent to which hadron colliders can discover and study BSM physics in various models. We have placed special emphasis on scenarios in which the new signal might be difficult to find or of a very unexpected nature. For example, in the context of supersymmetry (SUSY), we have considered: how to make fully precise predictions for the Higgs bosons as well as the superparticles of the Minimal • Supersymmetric Standard Model (MSSM) (parts III and IV); MSSM scenarios in which most or all SUSY particles have rather large masses (parts V and VI); • the ability to sort out the many parameters of the MSSM using a variety of signals and study channels • (part VII); whether the no-lose theorem for MSSM Higgs discovery can be extended to the next-to-minimal Super- • symmetric Standard Model (NMSSM) in which an additional singlet superfield is added to the minimal collection of superfields, potentially providing a natural explanation of the electroweak value of the pa- rameter µ (part VIII); sorting out the effects of CP violation using Higgs plus squark associate production (part IX); • the impact of lepton flavor violation of various kinds (part X); • experimental possibilities for the gravitino and its sgoldstino partner (part XI); • what the implications for SUSY would be if the NuTeV signal for di-muon events were interpreted as a • sign of R-parity violation (part XII). Our other main focus was on the phenomenological implications of extra dimensions. There, we considered: constraints on Kaluza Klein (KK) excitations of the SM gauge bosons from existing data (part XIII) and • the corresponding projected LHC reach (part XIV); techniques for discovering and studying the radion field which is generic in most extra-dimensional • scenarios (part XV); the impact of mixing between the radion and the Higgs sector, a fully generic possibility in extra- • dimensional models (part XVI); production rates and signatures of universal extra dimensions at hadron colliders (part XVII); • black hole production at hadron colliders, which would lead to truly spectacular events (part XVIII). • The above contributions represent a tremendous amount of work on the part of the individuals involved and represent the state of the art for many of the currently most important phenomenological research avenues. Of course, much more remains to be done. For example, one should continue to work on assessing the extent to which the discovery reach will be extended if one goes beyond the LHC to the super-high-luminosity LHC (SLHC) or to a very large hadron collider (VLHC) with ps 40 TeV. Overall, we believe our work shows ∼ that the LHC and future hadronic colliders will play a pivotal role in the discovery and study of any kind of new physics beyond the Standard Model. They provide tremendous potential for incredibly exciting new discoveries. Acknowledgments. We thank the organizers of this workshop for the friendly and stimulating atmosphere during the meeting. We 6 also thank our colleagues of the QCD/SM and HIGGS working groups for the very constructive interactions we had. We are grateful to the “personnel” of the Les Houches school for providing an environment that enabled us to work intensively and especially for their warm hospitality during our stay. 7 Part II Theoretical Developments J. Gunion, J. Hewett, K. Matchev, T. Rizzo Abstract Various theoretical aspects of physics beyond the Standard Model at hadron colliders are discussed. Our focus will be on those issues that most immediately impact the projects pursued as part of the BSM group at this meeting. 1. Introduction The Standard Model (SM) has had a tremendous success describing physical phenomena up to energies 100 ∼ GeV. Yet some of the deep questions of particle physics are still shrouded in mystery - the origin of electroweak symmetry breaking (and the related hierarchy problem), the physics of flavor and flavor mixing, CP -violation etc. Any attempt to make further theoretical progress on any one of these issues necessarily requires new physics beyond the SM. It is generally believed that the TeV scale will reveal at least some of this new physics. Throughout history, we have never gone a whole order of magnitude up in energy without seeing some new phenomenon. Further support is given by attempts to solve the gauge hierarchy problem. Either there is no Higgs boson in the SM and then some new physics must appear around the TeV scale to unitarize W W scattering, or the Higgs boson exists, and one has to struggle to explain the fact that its mass is minute in (fundamental) Planck mass units.
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