Search For Disappearing Tracks In Proton Proton Collisions At Arrow

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Search For Disappearing Tracks In Proton Proton Collisions At Arrow
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Author :
language : en
Publisher:
Release Date : 2015
Search For Disappearing Tracks In Proton Proton Collisions At Arrow written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
A search is presented for long-lived charged particles that decay within the CMS detector and produce the signature of a disappearing track. Disappearing tracks are identified as those with little or no associated calorimeter energy deposits and with missing hits in the outer layers of the tracker. The search uses proton-proton collision data recorded at [arrow]" = 8 TeV that corresponds to an integrated luminosity of 19.5 fb-1. The results of the search are interpreted in the context of the anomaly-mediated supersymmetry breaking (AMSB) model. The number of observed events is in agreement with the background expectation, and limits are set on the cross section of direct electroweak chargino production in terms of the chargino mass and mean proper lifetime. At 95% confidence level, AMSB models with a chargino mass less than 260 GeV, corresponding to a mean proper lifetime of 0.2 ns, are excluded.
Soviet Journal Of Nuclear Physics
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Author :
language : en
Publisher:
Release Date : 1994
Soviet Journal Of Nuclear Physics written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Nuclear physics categories.
Physics Of Atomic Nuclei
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Author :
language : en
Publisher:
Release Date : 1994
Physics Of Atomic Nuclei written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Nuclear physics categories.
Third Generation Susy And T T Z Production
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Author : Josh McFayden
language : en
Publisher: Springer
Release Date : 2014-06-06
Third Generation Susy And T T Z Production written by Josh McFayden and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-06-06 with Science categories.
This thesis describes searches for new particles predicted by the super symmetry (SUSY) theory, a theory extending beyond the current Standard Model of particle physics, using the ATLAS detector at the CERN Large Hadron Collider. The thesis focuses on searches for stop and sbottom squarks, the SUSY partners of the top and bottom quarks, which are expected to be lighter than the partners of the first and second generation quarks and therefore good candidates for the first evidence of SUSY. It describes novel techniques for estimating and rejecting the Standard-Model backgrounds to searches for these particles. It also includes an independent analysis seeking to constrain the Standard Model ttZ background process, which also represents the first ATLAS search for this rare process at the LHC. The stop squark analysis described, with substantial leading contributions from the author, is the first search for these particles at the LHC to use the jets plus missing transverse energy plus 0-lepton signature and provides the world's best limits on the stop mass for light neutralino LSPs. All in all, the thesis describes three different world-leading analyses in both Standard Model and SUSY physics and therefore represents a major contribution to the field.
Energy Research Abstracts
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Author :
language : en
Publisher:
Release Date : 1979
Energy Research Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with Power resources categories.
A Search For Disappearing Tracks In Proton Proton Collisions At Sqrt S
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Author : Jessica Danielle Brinson
language : en
Publisher:
Release Date : 2015
A Search For Disappearing Tracks In Proton Proton Collisions At Sqrt S written by Jessica Danielle Brinson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
This thesis presents a search for evidence of new supersymmetric particles in proton-proton collision data collected by the Compact Muon Solenoid at the Large Hadron Collider located in Geneva, Switzerland. The data was collected in 2012 at a center of mass energy of 8 TeV and corresponds to an integrated luminosity of 19.5 inverse femtobarns. The search examines events that produce the experimental signature of a disappearing track. Disappearing tracks are identifed as those with little or no associated calorimeter energy deposits and with several missing hits in the outer layers of the tracker. This search is motived by anomaly-mediated supersymmetry which postulates that a long-lived chargino decaying to a neutralino and pion with low momentum could give rise to a disappearing track. The sources of background in this search arise from leptons which fail to be reconstructed and false trajectories determined by the track reconstruction algorithm. The number of observed events is in agreement with the background expectation, and limits are set on the cross section of direct electroweak chargino production in terms of the chargino mass and mean proper lifetime. At 95 % confidence level, anomaly-mediated supersymmetry breaking models with a chargino mass less than 260 GeV, corresponding to a mean proper lifetime of 0.2 ns, are excluded.
Search For Disappearing Tracks In Proton Proton Collisions At S
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Author : Albert M. Sirunyan
language : en
Publisher:
Release Date : 2020
Search For Disappearing Tracks 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.
Annual Report Of The European Organization For Nuclear Research
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Author : European Organization for Nuclear Research
language : en
Publisher:
Release Date : 1983
Annual Report Of The European Organization For Nuclear Research written by European Organization for Nuclear Research and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983 with Nuclear physics categories.
Inis Atomindex
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Author :
language : en
Publisher:
Release Date : 1986
Inis Atomindex written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with Nuclear energy categories.
Search For Decays Of Stopped Long Lived Particles Produced In Proton Proton Collisions At Arrow
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Author :
language : en
Publisher:
Release Date : 2015
Search For Decays Of Stopped Long Lived Particles Produced In Proton Proton Collisions At Arrow written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.