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

Search for disappearing tracks in proton-proton collisions at $ s=8 $ TeV
Search for disappearing tracks in proton-proton collisions at $ s=8 $ TeV
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
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.
1029-8479
096
Khachatryan, V.
3ea104df-0bcf-40fc-a764-2311921cf360
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
The CMS Collaboration
Khachatryan, V.
3ea104df-0bcf-40fc-a764-2311921cf360
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3

The CMS Collaboration (2015) Search for disappearing tracks in proton-proton collisions at $ s=8 $ TeV. Journal of High Energy Physics, 01, 096. (doi:10.1007/JHEP01(2015)096).

Record type: Article

Abstract

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
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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More information

Published date: 19 January 2015
Organisations: Physics & Astronomy

Identifiers

Local EPrints ID: 410516
URI: http://eprints.soton.ac.uk/id/eprint/410516
ISSN: 1029-8479
PURE UUID: 8a2857d0-d0c6-49f7-944c-d3d5f86efcb1
ORCID for Alexander Belyaev: ORCID iD orcid.org/0000-0002-1733-4408

Catalogue record

Date deposited: 09 Jun 2017 09:02
Last modified: 10 Nov 2021 03:19

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Contributors

Author: V. Khachatryan
Corporate Author: The CMS Collaboration

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