U.S. Department of EnergyOffice of Scientific and Technical Information
Search for charginos nearly mass degenerate with the lightest neutralino based on a disappearing-track signature in pp collisions at =8 TeV with the ATLAS detector
Abstract
CERN-LHC. A search is presented for direct chargino production based on a disappearing-track signature using 20.3 fb^-1 of proton-proton collisions at sqrt(s) = 8 TeV collected in 2012 with the ATLAS experiment at the LHC. In anomaly-mediated supersymmetry breaking (AMSB) models, the lightest chargino is nearly mass-degenerate with the lightest neutralino and its lifetime is long enough to be detected in the tracking detectors by identifying decays that result in tracks with no associated hits in the outer region of the tracking system. Some models with supersymmetry also predict charginos with a significant lifetime. This analysis attains sensitivity for charginos with a lifetime between 0.1 ns and 10 ns, and significantly surpasses the reach of the LEP experiments. No significant excess above the background expectation is observed for candidate tracks with large transverse momentum, and constraints on chargino properties are obtained. In the AMSB scenarios, a chargino mass below 270 GeV is excluded at 95% confidence level.
- Authors:
-
- OSTI
- Publication Date:
- Research Org.:
- USDOE Office of Science (SC) (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Collaborations:
- The ATLAS collaboration; The ATLAS collaboration
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
- OSTI Identifier:
- 1893151
- DOI:
- https://doi.org/10.17182/hepdata.62699
Citation Formats
Aad, Georges. Search for charginos nearly mass degenerate with the lightest neutralino based on a disappearing-track signature in pp collisions at s =8 TeV with the ATLAS detector. United States: N. p., 2013.
Web. doi:10.17182/hepdata.62699.
Aad, Georges. Search for charginos nearly mass degenerate with the lightest neutralino based on a disappearing-track signature in pp collisions at s =8 TeV with the ATLAS detector. United States. doi:https://doi.org/10.17182/hepdata.62699
Aad, Georges. 2013.
"Search for charginos nearly mass degenerate with the lightest neutralino based on a disappearing-track signature in pp collisions at s =8 TeV with the ATLAS detector". United States. doi:https://doi.org/10.17182/hepdata.62699. https://www.osti.gov/servlets/purl/1893151. Pub date:Tue Oct 01 04:00:00 UTC 2013
@article{osti_1893151,
title = {Search for charginos nearly mass degenerate with the lightest neutralino based on a disappearing-track signature in pp collisions at s =8 TeV with the ATLAS detector},
author = {Aad, Georges},
abstractNote = {CERN-LHC. A search is presented for direct chargino production based on a disappearing-track signature using 20.3 fb^-1 of proton-proton collisions at sqrt(s) = 8 TeV collected in 2012 with the ATLAS experiment at the LHC. In anomaly-mediated supersymmetry breaking (AMSB) models, the lightest chargino is nearly mass-degenerate with the lightest neutralino and its lifetime is long enough to be detected in the tracking detectors by identifying decays that result in tracks with no associated hits in the outer region of the tracking system. Some models with supersymmetry also predict charginos with a significant lifetime. This analysis attains sensitivity for charginos with a lifetime between 0.1 ns and 10 ns, and significantly surpasses the reach of the LEP experiments. No significant excess above the background expectation is observed for candidate tracks with large transverse momentum, and constraints on chargino properties are obtained. In the AMSB scenarios, a chargino mass below 270 GeV is excluded at 95% confidence level.},
doi = {10.17182/hepdata.62699},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Oct 01 04:00:00 UTC 2013},
month = {Tue Oct 01 04:00:00 UTC 2013}
}