Title: Prospects for SUSY and BSM Physics at the High Luminosity LHC
Abstract: Prospects for the discovery of supersymmetry (SUSY) and other beyond-the-standard-model physics at the high-luminosity LHC are reviewed. Projections for the sensitivity for both strong and electroweak production of SUSY particles based on integrated luminosities up to 3000 fb−1 are presented, along with an analysis of several scenarios in which SUSY particles might be discovered. The potential complexity of the pattern of observed signals is highlighted, together with the importance of multi-signature “fingerprints,” which can help to elucidate the origin of a signal. A brief discussion is also given for exotic particle searches, illustrating how high-luminosity data samples can provide key information on the properties of discovered particles. Presented at LHCP2015 The 3rd Conference on Large Hadron Collider Physics Prospects for SUSY and BSM Physics at the High Luminosity LHC Jeffrey D. Richman1,a) 1Department of Physics, University of California, Santa Barbara, CA 93106 USA Representing the ATLAS and CMS collaborations Proceedings of the Third Annual Large Hadron Collider Physics Conference LHCP15, Aug. 31-Sep. 5, 2015, St. Petersburg, Russia a)Corresponding author: [email protected] Abstract. Prospects for the discovery of supersymmetry (SUSY) and other beyond-the-standard-model physics at the highluminosity LHC are reviewed. Projections for the sensitivity for both strong and electroweak production of SUSY particles based on integrated luminosities up to 3000 fb−1 are presented, along with an analysis of several scenarios in which SUSY particles might be discovered. The potential complexity of the pattern of observed signals is highlighted, together with the importance of multi-signature “fingerprints,” which can help to elucidate the origin of a signal. A brief discussion is also given for exotic particle searches, illustrating how high-luminosity data samples can provide key information on the properties of discovered particles. Prospects for the discovery of supersymmetry (SUSY) and other beyond-the-standard-model physics at the highluminosity LHC are reviewed. Projections for the sensitivity for both strong and electroweak production of SUSY particles based on integrated luminosities up to 3000 fb−1 are presented, along with an analysis of several scenarios in which SUSY particles might be discovered. The potential complexity of the pattern of observed signals is highlighted, together with the importance of multi-signature “fingerprints,” which can help to elucidate the origin of a signal. A brief discussion is also given for exotic particle searches, illustrating how high-luminosity data samples can provide key information on the properties of discovered particles. MOTIVATIONS FOR NEW PHYSICS SEARCHES AT THE LHC A central goal of the physics program of the Large Hadron Collider (LHC) is the exploration of particles and interactions at the TeV energy scale, which may hold answers to some of the most profound questions in particle physics. The mystery with the strongest empirical foundation is the nature of astrophysical dark matter. While there is no guarantee that the dark matter can be accounted for by weakly interacting massive particles (WIMPs) at the TeV scale, this explanation is well motivated, and the combined program of direct-detection experiments and further LHC searches are poised to make major progress in the next decade. A second, more theoretically motivated mystery, is the gauge hierarchy problem [1], which has become even more compelling with the discovery of the/a Higgs boson at a mass of approximately 125 GeV. Assuming that the Higgs is a fundamental scalar particle, its mass (and with it the entire electroweak scale) is subject to enormous short-distance quantum corrections which, on their own, would pull its value to some high cutoff scale, such as the Planck scale. This uncomfortable outcome can be avoided either by extreme fine tuning of the bare Higgs mass parameter, which is regarded as (extremely) unnatural, or by some new physics that cancels the effects of the quantum corrections. It is remarkable that this acute problem can be addressed by new physics scenarios ranging from supersymmetry (SUSY) to extra dimensions. Regardless of the physical mechanism, the new physics is expected to emerge somewhere around the TeV scale if fine tuning is to be avoided. A third mystery is whether the three standard model (SM) gauge coupling constants evolve with increasing energy such that they unify at some high scale, where a unified gauge group with this single gauge coupling constant would govern all non-gravitational interactions. The presence of SUSY at the TeV scale can lead to convergence of the running coupling constants at a high scale. Of course, a key element of the High Luminosity (HL) LHC program is the fullest possible study of the Higgs sector, which is covered in a separate talk by Aleandro Nisati at this conference. Thus, there are many indications, but no guarantees, that exploration of the TeV scale will lead to the discovery of new physics beyond the SM. This talk considers the long-term discovery potential of the ATLAS [2] and CMS [3] experiments at LHC and High Luminosity (HL) LHC physics programs, which should help to resolve these mysteries and many others. Because of time constaints, I will focus on supersymmetry, but studies of other (“exotic”) beyond-the-standard-model (BSM) scenarios are discussed briefly as well. LPCC SUSY Cross Section WG https://twiki.cern.ch/twiki/bin/view/LHCPhysics/SUSYCrossSections arXiv:1407.5066 SUSY sparticle mass [GeV]
Publication Year: 2016
Publication Date: 2016-02-01
Language: en
Type: article
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