![A Search for Supersymmetry in Events with Photons and Jets from Proton-proton Collisions at [square Route]s PDF](https://books.google.com/books/content/images/frontcover/EmuJ0AEACAAJ?fife=w150-h200)
Author: Robin James NandiPublisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
A Search for Supersymmetry in Events with Photons and Jets from Proton-proton Collisions at [square Route]s
![A Search for Supersymmetry in Events with Photons and Jets from Proton-proton Collisions at [square Route]s PDF](https://books.google.com/books/content/images/frontcover/EmuJ0AEACAAJ?fife=w80-h100)
Author: Robin James NandiA Search for Supersymmetry in Events with Photons and Jets from Proton-proton Collisions at √s
Author: Robin James NandiPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
An exclusion of Gauge Mediated Supersymmetry Breaking at 95% confidence level is made in the squark mass vs gluino mass parameter space using 1:1 fb -1 of proton-proton collisions data from the Large Hadron Collider. The event selection is based on the strong production signature of photons, jets and missing transverse energy. Missing transverse energy is used to distinguish signal from background. The background is estimated with a data driven technique. The CLs method is used to exclude models with squark mass and gluino mass up to around 1TeV.
Search for Supersymmetry with Photons in Pp Collisions at $\sqrt{s}$
Author: Publisher:
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Category :
Languages : en
Pages :
Book Description
Two searches for physics beyond the standard model in events containing photons are presented. Our data sample used corresponds to an integrated luminosity of 19.7 fb-1 of proton-proton collisions at √s=8 TeV, collected with the CMS experiment at the CERN LHC. The analyses pursue different inclusive search strategies. One analysis requires at least one photon, at least two jets, and a large amount of transverse momentum imbalance, while the other selects events with at least two photons and at least one jet, and uses the razor variables to search for signal events. The background expected from standard model processes is evaluated mainly from data. These results are interpreted in the context of general gauge-mediated supersymmetry, with the next-to-lightest supersymmetric particle either a bino- or wino-like neutralino, and within simplified model scenarios. Upper limits at the 95% confidence level are obtained for cross sections as functions of the masses of the intermediate supersymmetric particles.
Search for Supersymmetry in Events with One Lepton and Multiple Jets in Proton-proton Collisions at Sqrt(s)
Author: Publisher:
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Languages : en
Pages :
Book Description
A search for supersymmetry is performed in events with a single electron or muon in proton-proton collisions at a center-of-mass energy of 13 TeV. The data were recorded by the CMS experiment at the LHC and correspond to an integrated luminosity of 2.3 inverse femtobarns. Several exclusive search regions are defined based on the number of jets and b-tagged jets, the scalar sum of the jet transverse momenta, and the scalar sum of the missing transverse momentum and the transverse momentum of the lepton. The observed event yields in data are consistent with the expected backgrounds from standard model processes. The results are interpreted using two simplified models of supersymmetric particle spectra, both of which describe gluino pair production. In the first model, each gluino decays via a three-body process to top quarks and a neutralino, which is associated with the observed missing transverse momentum in the event. Gluinos with masses up to 1.6 TeV are excluded for neutralino masses below 600 GeV. In the second model, each gluino decays via a three-body process to two light quarks and a chargino, which subsequently decays to a W boson and a neutralino. The mass of the chargino is taken to be midway between the gluino and neutralino masses. In this model, gluinos with masses below 1.4 TeV are excluded for neutralino masses below 700 GeV.
Search for Stealth Supersymmetry in Events with Jets, Either Photons Or Leptons, and Low Missing Transverse Momentum in Pp Collisions at 8 TeV.
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 23
Book Description
The results of a search for new physics in final states with jets, either photons or leptons, and low missing transverse momentum are reported. The study is based on a sample of proton-proton collisions collected at a center-of-mass energy View the MathML source with the CMS detector in 2012. The integrated luminosity of the sample is 19.7 fb-1. Many models of new physics predict the production of events with jets, electroweak gauge bosons, and little or no missing transverse momentum. Examples include stealth models of supersymmetry (SUSY), which predict a hidden sector at the electroweak energy scale in which SUSY is approximately conserved. Furthermore, the data are used to search for stealth SUSY signatures in final states with either two photons or an oppositely charged electron and muon. No excess is observed with respect to the standard model expectation, and the results are used to set limits on squark pair production in the stealth SUSY framework.
Search for Supersymmetry in Events with a Single Lepton, Jets, and Missing Transverse Momentum Using a Neural Network
Author: Avishek ChatterjeePublisher:
ISBN:
Category :
Languages : en
Pages : 268
Book Description
A search for supersymmetry in proton-proton collisions at [SQUARE ROOT] s = 7 TeV is presented, focusing on events with a single isolated lepton, energetic jets, and large missing transverse momentum. The analyzed data corresponds to a total integrated luminosity of 4.98 fb[-]1 recorded by the CMS experiment. The search uses an artificial neural network to suppress Standard Model backgrounds, and estimates residual backgrounds using a fully data-driven method. The analysis is performed in both the muon and electron channels, and the combined result is interpreted in terms of limits on the CMSSM parameter space, as well as a simplified model.
Search for Supersymmetry in Events with at Least One Photon and Missing Transverse Momentum in Proton-proton Collisions at a Center-of-mass Energy of 13 TeV at the CMS Experiment
Author: Johannes SchulzSearch for Supersymmetry Using a Photon, B-jets, and E MissT Final State with the ATLAS Detector in Proton-proton Collisions at 8TeV Center-of-mass Energy
Author: Publisher:
ISBN: 9781321676105
Category :
Languages : en
Pages : 207
Book Description
The result of this analysis is interpreted in a general gauge mediation framework with a lightest neutralino that is a mixture of bino and higgsino. Limits are set in a 2D plane of gluino mass vs neutralino mass. Neutralino masses between 150 GeV and 450 GeV are excluded at 95% CL for all gluino masses, and gluino masses up to at least 1200 GeV (and up to 1350 GeV in some cases) are excluded at 95% CL for neutralino masses between 450 GeV and 50 GeV less than the gluino mass.
Search for Supersymmetry in Events with at Least One Photon, Missing Transverse Momentum, and Large Transverse Event Activity in Proton-proton Collisions at 13TeV with the CMS Detector in 2016
Author: Maximilian Knut KieselSearch for Supersymmetry in Proton-proton Collisions at 7 TeV in Events with a Single Lepton, B-tagged Jets and Missing Transverse Momentum at the LHC Using Data Collected from the CMS Detector
Author: Wing Howard ToPublisher:
ISBN: 9781303052842
Category :
Languages : en
Pages : 145
Book Description
This thesis describes a search for supersymmetry (SUSY) at the Large Hadron Collider using data collected in Run 2011 at center of mass energy of 7 TeV by the Compact Muon Solenoid detector with an integrated luminosity of 4.98 $fb{-1}$. First, the Large Hadron Collider is briefly described along with the Compact Muon Solenoid detector. Second, the Standard Model of particle physics is described which leads to the motivations for supersymmetry and its description. Finally, a search for supersymmetry in events with a single lepton, 2 b-tagged jets and missing transverse energy is documented in detail. The results are used to predict the yields from the standard model in bins missing transverse energy (\met) and total transverse hadronic energy (HT). Limits are set using these results using a minimal supergravity SUSY model and simplified model spectra SUSY model.