Performance Of Electron Reconstruction And Selection With The Cms Detector In Proton Proton Collisions At Arrow
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Performance Of Electron Reconstruction And Selection With The Cms Detector In Proton Proton Collisions At Arrow
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Author :
language : en
Publisher:
Release Date : 2015
Performance Of Electron Reconstruction And Selection With The Cms Detector 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.
The performance and strategies used in electron reconstruction and selection at CMS are presented based on data corresponding to an integrated luminosity of 19.7 fb-1, collected in proton-proton collisions at [arrow]" = 8 TeV at the CERN LHC. The paper focuses on prompt isolated electrons with transverse momenta ranging from about 5 to a few 100 GeV. A detailed description is given of the algorithms used to cluster energy in the electromagnetic calorimeter and to reconstruct electron trajectories in the tracker. The electron momentum is estimated by combining the energy measurement in the calorimeter with the momentum measurement in the tracker. Benchmark selection criteria are presented, and their performances assessed using Z, [Upsilon], and J/[psi] decays into e++ e- pairs. The spectra of the observables relevant to electron reconstruction and selection as well as their global efficiencies are well reproduced by Monte Carlo simulations. The momentum scale is calibrated with an uncertainty smaller than 0.3%. The momentum resolution for electrons produced in Z boson decays ranges from 1.7 to 4.5%, depending on electron pseudorapidity and energy loss through bremsstrahlung in the detector material.
Search For Long Lived Particles Using Delayed Photons In Proton Proton Collisions At 13 Tev With The Cms Detector
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Author : Kevin Patrick McDermott
language : en
Publisher:
Release Date : 2019
Search For Long Lived Particles Using Delayed Photons In Proton Proton Collisions At 13 Tev With The Cms Detector written by Kevin Patrick McDermott and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with categories.
This dissertation presents a search for long-lived particles using delayed photons in proton-proton collisions at sqrt(s) = 13 TeV recorded by the Compact Muon Solenoid (CMS) experiment at the CERN Large Hadron Collider in 2017, corresponding to an integrated luminosity of 41.5 fb^-1. This analysis includes a number of unique components that will be discussed: a dedicated signal trigger, out-of-time photon reconstruction and identification, and a detector time resolution measurement. The results of this search include the combination of a related analysis using data collected in 2016 also at sqrt(s) = 13 TeV, corresponding to a combined integrated luminosity of 77.4 fb^-1. The combined results are interpreted in the context of supersymmetry with gauge-mediated supersymmetry breaking, where the neutralino is long-lived and decays to a photon and a gravitino. Limits are presented as a function of the neutralino proper decay length and mass. For neutralino proper decay lengths of 10^1, 10^2, 10^3, and 10^4 cm, masses up to 320, 525, 360, and 215 GeV are excluded at 95% confidence level, respectively. Additionally, a discussion on a high-performance computing upgrade to CMS, known as mkFit, will be presented. mkFit is an on-going effort to exploit highly parallel computer architectures in vectorizing and parallelizing combinatorial Kalman filter charged particle track reconstruction algorithms. The current physics and computational performance of this project will be discussed.
Performance Of Track Reconstruction In The Zeus Central Tracking Detector Studies Of Qcd In Electron Proton Collisions At Hera
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Author : Patrick Edward Luffman
language : en
Publisher:
Release Date : 1993
Performance Of Track Reconstruction In The Zeus Central Tracking Detector Studies Of Qcd In Electron Proton Collisions At Hera written by Patrick Edward Luffman and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Deep inelastic collisions categories.
The Performance Of The Cms Muon Detector In Proton Proton Collisions At Sqrt S
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Author :
language : en
Publisher:
Release Date : 2013
The Performance Of The Cms Muon Detector In Proton Proton 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 2013 with categories.
Muon Reconstruction Performance Of The Atlas Detector In Proton Proton Collision Data At S
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Author : Hannah Arnold
language : en
Publisher:
Release Date : 2016
Muon Reconstruction Performance Of The Atlas Detector In Proton Proton Collision Data At S written by Hannah Arnold 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.
Performance Of Track Reconstruction In Zeus Central Tracking Studies Of Qcd In Electron Proton Collisions At Hera
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Author : Pateick Edward Luffman
language : en
Publisher:
Release Date : 1993
Performance Of Track Reconstruction In Zeus Central Tracking Studies Of Qcd In Electron Proton Collisions At Hera written by Pateick Edward Luffman and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with categories.
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.
Performance Of The Cms Level 1 Trigger In Proton Proton Collisions At S
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Author : Albert M. Sirunyan
language : en
Publisher:
Release Date : 2020
Performance Of The Cms Level 1 Trigger 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.
Muon Reconstruction Performance Of The Atlas Detector In Proton U2013 Proton Collision Data At U221a S
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Author :
language : en
Publisher:
Release Date : 2016
Muon Reconstruction Performance Of The Atlas Detector In Proton U2013 Proton Collision Data At U221a 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 article documents the performance of the ATLAS muon identification and reconstruction using the LHC dataset recorded at √s=13 TeV in 2015. Using a large sample of J/? → ?? and Z → ?? decays from 3.2 fb-1 of pp collision data, measurements of the reconstruction efficiency, as well as of the momentum scale and resolution, are presented and compared to Monte Carlo simulations. Furthermore, the reconstruction efficiency is measured to be close to 99% over most of the covered phase space (
Proton Antiproton Collider Physics 8th Topical Workshop
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Author : G Belletini
language : en
Publisher: World Scientific
Release Date : 1990-07-19
Proton Antiproton Collider Physics 8th Topical Workshop written by G Belletini and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990-07-19 with categories.
The proceedings presents in a systematic way Top searches, Jets, Gauge Boson production, precision tests of electroweak theory, Ln s Physics, heavy Flavours and exotics. In addition, contributions to the sessions 'News from the World', 'Short term future' and 'Long term future' show the progress of SSC in USA, of LHC at CERN, UNK/VLEPP in USSR together with Perspectives of Hadron Collider Physics.