Search For Metastable Heavy Charged Particles With Large Ionisation Energy Loss In Pp Collisions At Arrow
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Search For Metastable Heavy Charged Particles With Large Ionisation Energy Loss In Pp Collisions At Arrow
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Author :
language : en
Publisher:
Release Date : 2015
Search For Metastable Heavy Charged Particles With Large Ionisation Energy Loss In Pp 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.
The many extensions of the Standard Model predict the existence of charged heavy long-lived particles, such as R-hadrons or charginos. If produced at the Large Hadron Collider, these particles should be moving non-relativistically and are therefore identifiable through the measurement of an anomalously large specific energy loss in the ATLAS pixel detector. Measuring heavy long-lived particles through their track parameters in the vicinity of the interaction vertex provides sensitivity to metastable particles with lifetimes from 0.6 ns to 30 ns. A search for such particles with the ATLAS detector at the Large Hadron Collider is presented, based on a data sample corresponding to an integrated luminosity of 18.4 fb-1 of pp collisions at [arrow]"=8 TeV. No significant deviation from the Standard Model background expectation is observed, and lifetime-dependent upper limits on R-hadrons and chargino production are set. Gluino R-hadrons with 10 ns lifetime and masses up to 1185 GeV are excluded at 95 % confidence level, and so are charginos with 15 ns lifetime and masses up to 482 GeV.
Search For Metastable Heavy Charged Particles With Large Ionisation Energy Loss In Pp Collisions At Sqrt S
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Author :
language : en
Publisher:
Release Date : 2015
Search For Metastable Heavy Charged Particles With Large Ionisation Energy Loss 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 2015 with categories.
Many extensions of the Standard Model predict the existence of charged heavy long-lived particles, such as R-hadrons or charginos. These particles, if produced at the Large Hadron Collider, should be moving non-relativistically and are therefore identifiable through the measurement of an anomalously large specific energy loss in the ATLAS pixel detector. Measuring heavy long-lived particles through their track parameters in the vicinity of the interaction vertex provides sensitivity to metastable particles with lifetimes from 0.6 ns to 30 ns. A search for such particles with the ATLAS detector at the Large Hadron Collider is presented, based on a data sample corresponding to an integrated luminosity of \(18.4\) fb\(^{-1}\) of pp collisions at \(\sqrt{s} = 8\) TeV. No significant deviation from the Standard Model background expectation is observed, and lifetime-dependent upper limits on R-hadrons and chargino production are set. Gluino R-hadrons with 10 ns lifetime and masses up to 1185 GeV are excluded at 95 \(\%\) confidence level, and so are charginos with 15 ns lifetime and masses up to 482 GeV.
Search For Metastable Heavy Charged Particles With Large Ionization Energy Loss In Pp Collisions At S
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Author :
language : en
Publisher:
Release Date : 2016
Search For Metastable Heavy Charged Particles With Large Ionization Energy Loss In Pp Collisions At 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.
This study presents a search for massive charged long-lived particles produced in pp collisions at √s = 13TeV at the LHC using the ATLAS experiment. The data set used corresponds to an integrated luminosity of 3.2 fb–1. Many extensions of the Standard Model predict the existence of massive charged long-lived particles, such as R-hadrons. These massive particles are expected to be produced with a velocity significantly below the speed of light, and therefore to have a specific ionization higher than any Standard Model particle of unit charge at high momenta. The Pixel subsystem of the ATLAS detector is used to measure the ionization energy loss of reconstructed charged particles and to search for such highly ionizing particles. The search presented here has much greater sensitivity than a similar search performed using the ATLAS detector in the √s = 8TeV data set, thanks to the increase in expected signal cross section due to the higher center-of-mass energy of collisions, to an upgraded detector with a new silicon layer close to the interaction point, and to analysis improvements. No significant deviation from Standard Model background expectations is observed, and lifetime-dependent upper limits on R-hadron production cross sections and masses are set. Gluino R-hadrons with lifetimes above 0.4 ns and decaying to qq¯ plus a 100 GeV neutralino are excluded at the 95% confidence level, with lower mass limit ranging between 740 and 1590 GeV. In the case of stable R-hadrons the lower mass limit at the 95% confidence level is 1570 GeV.
Inis Atomindex
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Author :
language : en
Publisher:
Release Date : 1980
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 1980 with Nuclear energy categories.
Search For Heavy Long Lived Multi Charged Particles In Pp Collisions At Arrow
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Author :
language : en
Publisher:
Release Date : 2015
Search For Heavy Long Lived Multi Charged Particles In Pp 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 for heavy long-lived multi-charged particles is performed using the ATLAS detector at the LHC. Data collected in 2012 at [arrow]" = 8 TeV from pp collisions corresponding to an integrated luminosity of 20.3 fb-1 are examined. Particles producing anomalously high ionisation, consistent with long-lived massive particles with electric charges from.
Search For Stable And Long Lived Heavy Charged Particles In Electron Positron Collisions At Center Of Mass Energies From 130 To 209 Gev With The Opal Detector At Lep
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Author : Gabriele Benelli
language : en
Publisher:
Release Date : 2003
Search For Stable And Long Lived Heavy Charged Particles In Electron Positron Collisions At Center Of Mass Energies From 130 To 209 Gev With The Opal Detector At Lep written by Gabriele Benelli and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with Collisions (Nuclear physics) categories.
Search For Multiply Charged Heavy Stable Charged Particles In Data Collected With The Cms Detector
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Author :
language : en
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Release Date : 2013
Search For Multiply Charged Heavy Stable Charged Particles In Data Collected With The Cms Detector written by 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.
Several models of new physics yield particles that are massive, long-lived, and have an electric charge, Q, greater than that of the electron, e. A search for evidence of such particles was performed using 5.0 fb-1 and 18.8 fb-1 of proton-proton collision data collected at √s = 7 TeV and √s = 8 TeV, respectively, with the Compact Muon Solenoid detector at the Large Hadron Collider. The distinctive detector signatures of these particles are that they are slow-moving and highly ionizing. Ionization energy loss and time-of- flight measurements were made using the inner tracker and the muon system, respectively. The search is sensitive to 1e ≤
Search For A Heavy Neutral Particle Decaying To E Mu E Tau Or Mu Tau In Pp Collisions At Arrow
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Author :
language : en
Publisher:
Release Date : 2015
Search For A Heavy Neutral Particle Decaying To E Mu E Tau Or Mu Tau In Pp 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.
Search For Heavy Long Lived Charged Particles With The Atlas Detector In Pp Collisions At S
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Author : Shikma Bressler
language : en
Publisher:
Release Date : 2011
Search For Heavy Long Lived Charged Particles With The Atlas Detector In Pp Collisions At S written by Shikma Bressler 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.
Search For Long Lived Charged Particles In Proton Proton Collisions At Math Display
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Author :
language : en
Publisher:
Release Date : 2016
Search For Long Lived Charged Particles In Proton Proton Collisions At 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.
Results are presented of a search for heavy stable charged particles produced in proton-proton collisions at √s = 13 TeV using a data sample corresponding to an integrated luminosity of 2.5 fb-1 collected in 2015 with the CMS detector at the CERN LHC. The search is conducted using signatures of anomalously high energy deposits in the silicon tracker and long time-of-flight measurements by the muon system. The data are consistent with the expected background, and upper limits are set on the cross sections for production of long-lived gluinos, top squarks, tau sleptons, and lepton-like long-lived fermions. These upper limits are equivalently expressed as lower limits on the masses of new states; the limits for gluinos, ranging up to 1610 GeV, are the most stringent to date. Furthermore, limits on the cross sections for direct pair production of long-lived tau sleptons are also determined.