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Inclusive SUSY searches at the LHC  [PDF]
Sezen Sekmen
Physics , 2014,
Abstract: I summarize the status of the inclusive SUSY searches conducted by the ATLAS and CMS experiments using the 20 fb-1 of 8 TeV LHC data in the all inclusive, 0 lepton, >=1 lepton and >=2 lepton final states. Current searches show that data are consistent with the SM. The impact of this consistency was explored on a rich variety of SUSY scenarios and simplified models, examples of which I present here.
Trigger strategies for SUSY searches at the LHC  [PDF]
A. De Santo
Physics , 2007,
Abstract: Supersymmetry will be searched for in a variety of final states at the LHC. It is crucial that a robust, efficient and unbiased trigger selection for SUSY is implemented from the very early days of data taking. After a brief description of the ATLAS and the CMS trigger systems, and a more in-depth discussion of the ATLAS High-Level Trigger, a triggering strategy is outlined for early SUSY searches at the LHC.
Searches for SUSY at LHC  [PDF]
A. Kharchilava,For the CMS Collaboration
Physics , 1997,
Abstract: One of the main motivations of experiments at the LHC is to search for SUSY particles. The talk is based on recent analyses, performed by CMS Collaboration, within the framework of the Supergravity motivated minimal SUSY extension of the Standard Model. The emphasis is put on leptonic channels. The strategies for obtaining experimental signatures for strongly and weakly interacting sparticles productions, as well as examples of determination of SUSY masses and model parameters are discussed. The domain of parameter space where SUSY can be discovered is investigated. Results show, that if SUSY is of relevance at Electro-Weak scale it could hardly escape detection at LHC.
Searches for weakly produced SUSY at LHC  [PDF]
Santiago Folgueras
Physics , 2015,
Abstract: A summary of the different searches for weakly produced SUSY by both CMS and ATLAS is presented here. A review on the methodology of these searches, including event selection, background suppression and estimation methods, etc is covered. Other searches at the LHC already probe squarks and gluino masses up to 1.4 TeV, such scenario, may favour electroweak production of charginos and neutralinos, that will produce many-lepton final states accompanied by E$_{\rm T}^{\rm miss}\,$ and very little hadronic activity. Latest searches include Higgs boson in the decay and exploits VBF associated production to probe scenarios with very small mass splittings.
Evidence for Conservatism in LHC SUSY Searches  [PDF]
Benjamin Nachman,Tom Rudelius
Statistics , 2012, DOI: 10.1140/epjp/i2012-12157-0
Abstract: The standard in the high energy physics community for claiming discovery of new physics is a $5\sigma$ excess in the observed signal over the estimated background. While a $3\sigma$ excess is not enough to claim discovery, it is certainly enough to pique the interest of both experimentalists and theorists. However, with a large number of searches performed by both the ATLAS and CMS collaborations at the LHC, one expects a nonzero number of multi-$\sigma$ results simply due to statistical fluctuations in the no-signal scenario. Our analysis examines the distribution of p-values for CMS and ATLAS supersymmetry (SUSY) searches using the full 2011 data set to determine if the collaborations are being overly conservative in their analyses. We find that there is a statistically significant excess of `medium' $\sigma$ values at the level of $p=0.005$, indicating over-conservativism in the estimation of uncertainties.
Higgs and SUSY Searches at LHC  [PDF]
D. P. Roy
Physics , 1998, DOI: 10.1007/BF02827476
Abstract: I start with a brief introduction to Higgs mechanism and supersymmetry. Then I discuss the theoretical expectations, current limits and search strategies for Higgs boson(s) at LHC --- first in the SM and then in the MSSM. Finally I discuss the signatures and search strategies for the superparticles.
Correlated Event Excesses in LHC SUSY Searches at 7 & 8 TeV: New Physics or Conspiring Noise?  [PDF]
Tianjun Li,James A. Maxin,Dimitri V. Nanopoulos,Joel W. Walker
Physics , 2013, DOI: 10.1140/epjc/s10052-013-2556-x
Abstract: We examine the ATLAS and CMS 7 & 8 TeV multijet supersymmetry (SUSY) searches requiring the incidence of a single lepton in the framework of the supersymmetric grand unified model No-Scale Flipped SU(5) with extra vector-like flippon multiplets derived from F-Theory, or F-SU(5) for short. Investigated are five multijet+lepton SUSY searches: 4.7/fb ATLAS 7 TeV gluino and light stop searches, as well as 13/fb ATLAS and 9.7/fb CMS 8 TeV light stop searches. Most significantly, all five leptonic SUSY searches represent statistically independent data samples. Findings show that all five orthogonal sets of leptonic LHC observations give a lower bound to the gaugino mass scale at M_{1/2} >= 680 GeV, with all the current best fits correlating within a narrow region. Furthermore, eight statistically independent LHC SUSY search regions (leptonic + all-hadronic) accessible to the No-Scale F-SU(5) model space intersect with all the currently operating beyond the Standard Model experiments within the range of M_{1/2} = 680-850 GeV, with the upper bound established by the lower experimental limit of the anomalous magnetic moment (g_{mu}-2)/2 of the muon. We emphasize that this region of the F-SU(5) model space may not be fully probed by leptonic SUSY searches at the LHC until the 13 TeV LHC energizes in 2015. Additionally, we describe an efficient technique for the effective statistical disentanglement of searches sensitive to mutually overlapping event spaces.
Muon g-2 vs LHC in Supersymmetric Models
Endo, Motoi;Hamaguchi, Koichi;Iwamoto, Sho;Yoshinaga, Takahiro
High Energy Physics - Phenomenology , 2013,
Abstract: There is more than 3 sigma deviation between the experimental and theoretical results of the muon g-2. This suggests that some of the SUSY particles have a mass of order 100 GeV. We study searches for those particles at the LHC with particular attention to the muon g-2. In particular, the recent results on the searches for the non-colored SUSY particles are investigated in the parameter region where the muon g-2 is explained. The analysis is independent of details of the SUSY models. Future prospects of the collider searches are also discussed.
Muon g-2 vs LHC in Supersymmetric Models  [PDF]
Motoi Endo,Koichi Hamaguchi,Sho Iwamoto,Takahiro Yoshinaga
Physics , 2013, DOI: 10.1007/JHEP01(2014)123
Abstract: There is more than 3 sigma deviation between the experimental and theoretical results of the muon g-2. This suggests that some of the SUSY particles have a mass of order 100 GeV. We study searches for those particles at the LHC with particular attention to the muon g-2. In particular, the recent results on the searches for the non-colored SUSY particles are investigated in the parameter region where the muon g-2 is explained. The analysis is independent of details of the SUSY models. Future prospects of the collider searches are also discussed.
Interpreting LHC SUSY searches in the phenomenological MSSM  [PDF]
S. Sekmen,S. Kraml,J. Lykken,F. Moortgat,S. Padhi,L. Pape,M. Pierini,H. B. Prosper,M. Spiropulu
Physics , 2011, DOI: 10.1007/JHEP02(2012)075
Abstract: We interpret within the phenomenological MSSM (pMSSM) the results of SUSY searches published by the CMS collaboration based on the first ~1 fb^-1 of data taken during the 2011 LHC run at 7 TeV. The pMSSM is a 19-dimensional parametrization of the MSSM that captures most of its phenomenological features. It encompasses, and goes beyond, a broad range of more constrained SUSY models. Performing a global Bayesian analysis, we obtain posterior probability densities of parameters, masses and derived observables. In contrast to constraints derived for particular SUSY breaking schemes, such as the CMSSM, our results provide more generic conclusions on how the current data constrain the MSSM.
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