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Title: Search for disappearing tracks in proton-proton collisions at √s = 8 TeV

Abstract

In this study, 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 √s = 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.

Authors:
 [1]
+ Show Author Affiliations
  1. Yerevan Physics Inst. (YerPhI), Yerevan (Armenia). et al.
Publication Date:
Research Org.:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP)
Contributing Org.:
CMS Collaboration
OSTI Identifier:
1234868
Report Number(s):
FERMILAB-PUB-14-569-CMS; CERN-PH-EP-2014-273; CMS-EXO-12-034<
Journal ID: ISSN 1029-8479; arXiv eprint number arXiv:1411.6006
Grant/Contract Number:  
AC02-07CH11359
Resource Type:
Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2015; Journal Issue: 1; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; hadron-hadron scattering; supersymmetry; exotics

Citation Formats

Khachatryan, V. Search for disappearing tracks in proton-proton collisions at √s = 8 TeV. United States: N. p., 2015. Web. doi:10.1007/JHEP01(2015)096.
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Khachatryan, V. Search for disappearing tracks in proton-proton collisions at √s = 8 TeV. United States. https://doi.org/10.1007/JHEP01(2015)096
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Khachatryan, V. Mon . "Search for disappearing tracks in proton-proton collisions at √s = 8 TeV". United States. https://doi.org/10.1007/JHEP01(2015)096. https://www.osti.gov/servlets/purl/1234868.
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@article{osti_1234868,
title = {Search for disappearing tracks in proton-proton collisions at √s = 8 TeV},
author = {Khachatryan, V.},
abstractNote = {In this study, 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 √s = 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.},
doi = {10.1007/JHEP01(2015)096},
journal = {Journal of High Energy Physics (Online)},
number = 1,
volume = 2015,
place = {United States},
year = {Mon Jan 19 00:00:00 EST 2015},
month = {Mon Jan 19 00:00:00 EST 2015}
}
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https://doi.org/10.1007/JHEP01(2015)096
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