Measurement Of Www Production And Search For Supersymmetric Particles In Multi Lepton Final States In Pp Collisions At Square Root 8
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Measurement Of Www Production And Search For Supersymmetric Particles In Multi Lepton Final States In Pp Collisions At Square Root 8
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Author : Martina Javůrková
language : en
Publisher:
Release Date : 2017
Measurement Of Www Production And Search For Supersymmetric Particles In Multi Lepton Final States In Pp Collisions At Square Root 8 written by Martina Javůrková and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with categories.
Abstract: The results presented in this thesis use the full dataset collected in 2012 by the ATLAS experiment from the LHC proton-proton collisions at sqrt(s) = 8 TeV, corresponding to an integrated luminosity of 20.3 fb^(−1). The first part is devoted to the search for the WWW production in the decay channel where each W boson decays leptonically (excluding leptonic tau decays). Upper limits are placed on the production cross-section in the fiducial phase space. The results are also interpreted in terms of the total cross-section when combined together with the semi-leptonic decay channel. In addition, limits on anomalous quartic gauge boson couplings in an effective field theory approach are extracted. The second part presents a search for supersymmetry in events with multiple jets, two leptons of identical charges or three leptons (electrons or muons). The absence of any excess in the signal regions with respect to the Standard Model expectations is interpreted in terms of limits in the parameter space of 14 supersymmetric models and one mUED model
Measurement Of Www Production And Search For Supersymmetric Particles In Multi Lepton Final States In Pp Collisions At Square Root 8
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Author : Martina Javůrková
language : en
Publisher:
Release Date : 2017
Measurement Of Www Production And Search For Supersymmetric Particles In Multi Lepton Final States In Pp Collisions At Square Root 8 written by Martina Javůrková and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with categories.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1995
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Aeronautics categories.
Search For Stopped Long Lived Particles Produced In Pp Collisions At 8 Tev At Cms
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Author : Marissa L. Rodenburg
language : en
Publisher:
Release Date : 2014
Search For Stopped Long Lived Particles Produced In Pp Collisions At 8 Tev At Cms written by Marissa L. Rodenburg 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.
At the Large Hadron Collider counter-rotating proton beams are collided at sqrt(s) = 8 TeV. The Compact Muon Solenoid (CMS) is used to measure the energies and charges of the resulting cascade of particles produced in these collisions. This search focuses on the observation of massive, long-lived particles, such as the gluino, that would suggest new physics beyond the Standard Model. A custom trigger is used to probe time periods during which no proton collisions occur, thereby eliminating most backgrounds to the signal. The remaining backgrounds resulting from cosmic rays, beam-related effects, and instrumental noise, are further reduced using a series of sophisticated selection cuts. Candidate events passing all selection cuts are analyzed using a counting experiment and limits are placed on the cross sections and masses of the gluino and the supersymmetric top quark.
A Search In The Two Photon Final State For Evidence Of New Particle Production In Pp Collisions At Square Root 8
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Author : Rachel Paula Yohay
language : en
Publisher:
Release Date : 2012
A Search In The Two Photon Final State For Evidence Of New Particle Production In Pp Collisions At Square Root 8 written by Rachel Paula Yohay and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
Search For Strong Production Of Supersymmetric Particles In Final States With Missing Transverse Momentum And At Least Three B Jets At Sqrt S
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Author :
language : en
Publisher:
Release Date : 2014
Search For Strong Production Of Supersymmetric Particles In Final States With Missing Transverse Momentum And At Least Three B Jets 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 2014 with categories.
We report the results of a search for strong production of supersymmetric particles in 20.1 fb1 of proton-proton collisions at a centre-of-mass energy of 8TeV using the ATLAS detector at the LHC. The search is performed separately in events with either zero or at least one high-pT lepton (electron or muon), large missing transverse momentum, high jet multiplicity and at least three jets identified as originated from the fragmentation of a b-quark. No excess is observed with respect to the Standard Model predictions. The results are interpreted in the context of several supersymmetric models involving gluinos and scalar top and bottom quarks, as well as a mSUGRA/CMSSM model. Lastly, gluino masses up to 1340 GeV are excluded, depending on the model, significantly extending the previous ATLAS limits.
Search For Supersymmetric Particles In Final States With Multi Leptons With The Atlas Detector
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Author : Huan Ren
language : en
Publisher:
Release Date : 2017
Search For Supersymmetric Particles In Final States With Multi Leptons With The Atlas Detector written by Huan Ren and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with categories.
Search For Multi Lepton Events From Strong And Electroweak Susy Production In Pp Collisions At A Center Of Mass Energy Of 7 Tev
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Author : Peter Thomassen
language : en
Publisher:
Release Date : 2012
Search For Multi Lepton Events From Strong And Electroweak Susy Production In Pp Collisions At A Center Of Mass Energy Of 7 Tev written by Peter Thomassen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Leptons (Nuclear physics) categories.
A Search For Excited Leptons In Pp Collisions At Sqrt S
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Author :
language : en
Publisher:
Release Date : 2011
A Search For Excited Leptons In Pp Collisions 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 2011 with categories.
A search for excited leptons is carried out with the CMS detector at the LHC, using 36 inverse picobarns of pp collision data recorded at sqrt(s) = 7 TeV. The search is performed for associated production of a lepton and an oppositely charged excited lepton pp to l l*, followed by the decay l* to l gamma, resulting in the l l gamma final state, where l = electron or muon. No excess of events above the standard model expectation is observed. Interpreting the findings in the context of l* production through four-fermion contact interactions and subsequent decay via electroweak processes, first upper limits are reported for l* production at this collision energy. The exclusion region in the compositeness scale Lambda and excited lepton mass M(l*) parameter space is extended beyond previously established limits. For Lambda = M(l*), excited lepton masses are excluded below 1070 GeV/c2̂ for e* and 1090 GeV/c2̂ for mu* at the 95% confidence level.
A Search For New Phenomena In Pp Collisions At Sqrt S
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Author :
language : en
Publisher:
Release Date : 2016
A Search For New Phenomena In Pp Collisions 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.
A search for new phenomena is performed in final states containing one or more jets and an imbalance in transverse momentum in pp collisions at a centre-of-mass energy of 13 TeV. The analysed data sample, recorded with the CMS detector at the CERN LHC, corresponds to an integrated luminosity of 2.3 inverse femtobarns. Several kinematic variables are employed to suppress the dominant background, multijet production, as well as to discriminate between other standard model and new physics processes. The search provides sensitivity to a broad range of new-physics models that yield a stable weakly interacting massive particle. The number of observed candidate events is found to agree with the expected contributions from standard model processes, and the result is interpreted in the mass parameter space of fourteen simplified supersymmetric models that assume the pair production of gluinos or squarks and a range of decay modes. For models that assume gluino pair production, masses up to 1575 and 975 GeV are excluded for gluinos and neutralinos, respectively. For models involving the pair production of top squarks and compressed mass spectra, top squark masses up to 400 GeV are excluded.