Search For Electroweak Supersymmetry In Final States With Three Electrons Or Muons Plus Missing Transverse Momentum In 13 Tev Proton Proton Collisions At The Large Hadron Collider With The Atlas Detector
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Search For Electroweak Supersymmetry In Final States With Three Electrons Or Muons Plus Missing Transverse Momentum In 13 Tev Proton Proton Collisions At The Large Hadron Collider With The Atlas Detector
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Author : Nicola Louise Abraham
language : en
Publisher:
Release Date : 2018
Search For Electroweak Supersymmetry In Final States With Three Electrons Or Muons Plus Missing Transverse Momentum In 13 Tev Proton Proton Collisions At The Large Hadron Collider With The Atlas Detector written by Nicola Louise Abraham and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with categories.
A Search For Supersymmetry In Events With A Z Boson Jets And Missing Transverse Energy In Pp Collisions With Sqrt S
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Author : Tova Ray Holmes
language : en
Publisher:
Release Date : 2016
A Search For Supersymmetry In Events With A Z Boson Jets And Missing Transverse Energy In Pp Collisions With Sqrt S written by Tova Ray Holmes and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
A search for new phenomena in final states containing a Z boson decaying to electrons or muons, jets, and large missing transverse momentum is presented. This search uses proton--proton collision data collected during 2015 and 2016 at a center of mass energy sqrt(s)=13 TeV by the ATLAS detector at the Large Hadron Collider, which correspond to an integrated luminosity of 14.7 fb-1. The search targets the pair production of supersymmetric particles, squarks or gluinos, which decay via jets and a Z boson to the lightest Supersymmetric particle, which does not interact with the ATLAS detector. Results are interpreted in simplified models of gluino-pair (squark-pair) production, and provide sensitivity to gluinos (squarks) with masses as large as 1.3 (1.0) TeV.
Search For Supersymmetry In 8 Tev Proton Proton Collision Events With Bottom Quark Jets And Missing Transverse Energy
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Author : Benjamin Kreis
language : en
Publisher:
Release Date : 2014
Search For Supersymmetry In 8 Tev Proton Proton Collision Events With Bottom Quark Jets And Missing Transverse Energy written by Benjamin Kreis and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.
A search for supersymmetry in a sample of proton-proton collision events with a center-of-mass energy of 8 TeV is presented. The sample, collected with the Compact Muon Solenoid detector at the Large Hadron Collider, corresponds to an integrated luminosity of 19.4 fb[-]1 . Events are required to have large missing transverse energy, at least three jets, and at least one identified bottom-quark jet. Numbers of events in exclusive bins of the scalar sum of jet transverse momentum values, missing transverse energy, and bottom-quark jet multiplicity are found to be consistent with the standard model expectations. The results are interpreted as 95% confidence level upper limits on simplified supersymmetric models approximating gluino mediated bottom- and top-squark production.
Search For Supersymmetry In The Multijet And Missing Transverse Momentum Final State In Pp Collisions At 13 Tev
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Author :
language : en
Publisher:
Release Date : 2016
Search For Supersymmetry In The Multijet And Missing Transverse Momentum Final State In Pp Collisions At 13 Tev written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
A search for new physics is performed based on all-hadronic events with large missing transverse momentum produced in proton-proton collisions at sqrt(s)=13 TeV. The data sample, corresponding to an integrated luminosity of 2.3 inverse femtobarns, was collected with the CMS detector at the CERN LHC in 2015. The data are examined in search regions of jet multiplicity, tagged bottom quark jet multiplicity, missing transverse momentum, and the scalar sum of jet transverse momenta. The observed numbers of events in all search regions are found to be consistent with the expectations from standard model processes. Exclusion limits are presented for simplified supersymmetric models of gluino pair production. Depending on the assumed gluino decay mechanism, and for a massless, weakly interacting, lightest neutralino, lower limits on the gluino mass from 1440 to 1600 GeV are obtained, significantly extending previous limits.
Search 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
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Author : Wing Howard To
language : en
Publisher:
Release Date : 2013
Search 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 written by Wing Howard To and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
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.
Search For Supersymmetry At Sqrt S
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Author :
language : en
Publisher:
Release Date : 2016
Search For Supersymmetry At Sqrt S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
Here, a search for strongly produced supersymmetric particles is conducted using signatures involving multiple energetic jets and either two isolated leptons (e or [mu]) with the same electric charge or at least three isolated leptons. The search also utilises b-tagged jets, missing transverse momentum and other observables to extend its sensitivity. The analysis uses a data sample of proton-proton collisions at √s = 13 TeV recorded with the ATLAS detector at the Large Hadron Collider in 2015 corresponding to a total integrated luminosity of 3.2 fb-1. No significant excess over the Standard Model expectation is observed. The results are interpreted in several simplified supersymmetric models and extend the exclusion limits from previous searches. In the context of exclusive production and simplified decay modes, gluino masses are excluded at 95% confidence level up to 1.1-1.3 TeV for light neutralinos (depending on the decay channel), and bottom squark masses are also excluded up to 540 GeV. In the former scenarios, neutralino masses are also excluded up to 550-850 GeV for gluino masses around 1 TeV.
Searches For Supersymmetry In Multilepton Final States With The Atlas Detector
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Author : Steven Farrell
language : en
Publisher:
Release Date : 2014
Searches For Supersymmetry In Multilepton Final States With The Atlas Detector written by Steven Farrell and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.
Two searches for supersymmetry in multilepton final states are presented using pp collisions at sqrt(s) = 8 TeV in the ATLAS detector. First, a search for electroweak production of charginos and neutralinos in the three-lepton plus missing transverse momentum channel is detailed with an emphasis on the fake-lepton background estimation technique. No significant excess above the Standard Model prediction is observed in the signal regions. Exclusion limits are thus placed on simplified models of chargino1-neutralino2 production and decays via intermediate sleptons, SM gauge bosons, and Higgs bosons. The results are also interpreted in terms of the phenomenological MSSM. Next, a search for R-parity violating and R-parity conserving supersymmetric scenarios in the four-lepton channel is presented. No significant excess is observed, so exclusion limits are placed R-parity violating simplified models in which the lightest supersymmetric particle is the lightest neutralino, which promptly decays to leptons. Exclusion limits are also placed on R-parity conserving simplified models of neutralino2-neutralino3 production.
Search For Supersymmetry In Proton Proton Collisions At 8 Tev In Events With A Single Lepton Large Jet Multiplicity And Multiple B Jets
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Author : Paul B. Geffert
language : en
Publisher:
Release Date : 2014
Search For Supersymmetry In Proton Proton Collisions At 8 Tev In Events With A Single Lepton Large Jet Multiplicity And Multiple B Jets written by Paul B. Geffert and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.
This thesis describes a search for supersymmetry in events with a single lepton, large jet multiplicity, multiple b jets, and significant transverse momentum imbalance in 19.3 fb-1 of pp collisions at center of mass energy of 8 TeV recorded in 2012 by the Compact Muon Solenoid experiment at the Large Hadron Collider. This signature targets strongly produced massive gluinos which decay through top squarks. The observed yields in the signal regions, spanning a broad range of event kinematics, agree with the Standard Model background predictions, which are obtained with a heavy reliance on data control samples. The results of this search are interpreted as cross section limits in the context of simplified supersymmetric scenarios in which gluinos are pair produced and cascade decay to a four top quark, two lightest neutralino final state. By comparing these limits with gluino pair production cross sections, gluinos with mass less than 1 TeV are excluded for low lightest neutralino masses, largely independent of top squark mass.
Search For Supersymmetry In Final States With Two Oppositely Charged Same Flavor Leptons And Missing Transverse Momentum In Proton Proton Collisions At S
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Author : Albert M. Sirunyan
language : en
Publisher:
Release Date : 2020
Search For Supersymmetry In Final States With Two Oppositely Charged Same Flavor Leptons And Missing Transverse Momentum In Proton Proton Collisions At S written by Albert M. Sirunyan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020 with categories.
Search For The Electroweak Production Of Supersymmetric Particles In Math Display
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Author :
language : en
Publisher:
Release Date : 2016
Search For The Electroweak Production Of Supersymmetric Particles In Math Display written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
In this study, the ATLAS experiment has performed extensive searches for the electroweak production of charginos, neutralinos, and staus. This article summarizes and extends the search for electroweak supersymmetry with new analyses targeting scenarios not covered by previously published searches. New searches use vector-boson fusion production, initial-state radiation jets, and low-momentum lepton final states, as well as multivariate analysis techniques to improve the sensitivity to scenarios with small mass splittings and low-production cross sections. Results are based on 20 fb-1 of proton-proton collision data at √s = 8 TeV recorded with the ATLAS experiment at the Large Hadron Collider. No significant excess beyond Standard Model expectations is observed. The new and existing searches are combined and interpreted in terms of 95% confidence-level exclusion limits in simplified models, where a single production process and decay mode is assumed, as well as within phenomenological supersymmetric models.