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

Khachatryan, V.

doi:10.1007/JHEP01(2015)096

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

Journal Article · Mon Jan 19 00:00:00 EST 2015 · Journal of High Energy Physics (Online)

DOI:https://doi.org/10.1007/JHEP01(2015)096· OSTI ID:1234868

Khachatryan, V. ^[1]

Yerevan Physics Inst. (YerPhI), Yerevan (Armenia). et al.

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.

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Research Organization:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP)

Contributing Organization:: CMS Collaboration

Grant/Contract Number:: AC02-07CH11359

OSTI ID:: 1234868

Report Number(s):: FERMILAB-PUB-14-569-CMS; CERN-PH-EP-2014-273; CMS-EXO-12-034<; arXiv eprint number arXiv:1411.6006

Journal Information:: Journal of High Energy Physics (Online), Vol. 2015, Issue 1; ISSN 1029-8479

Publisher:: Springer BerlinCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 73 works

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