Search for Electroweak Production of Charginos in Final States with Two τ Leptons in Pp Collisions at √s = 8 TeV
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Khachatryan2017_Article_SearchForElectroweakProduction.pdf
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Author(s)
CMS Collaboration
Abercrombie, Daniel Robert
Allen, Brandon Leigh
Apyan, Aram
Barbieri, Richard Alexander
Baty, Austin Alan
Bi, Ran
Bierwagen, Katharina
Brandt, Stephanie Akemi
Busza, Wit
Date Issued
April 2017
Journal
Journal of High Energy Physics
Publisher
Springer Nature
Citation
Khachatryan, V. et al. “Search for Electroweak Production of Charginos in Final States with Two τ Leptons in Pp Collisions at √s = 8 TeV.” Journal of High Energy Physics 2017, 4 (April 2017) © 2017 The Author(s)
Version
Final published version
Abstract
Results are presented from a search for the electroweak production of supersymmetric particles in pp collisions in final states with two τ leptons. The data sample corresponds to an integrated luminosity between 18.1 fb⁻¹ and 19.6 fb⁻¹ depending on the final state of τ lepton decays, at √s = 8 TeV, collected by the CMS experiment at the LHC. The observed event yields in the signal regions are consistent with the expected standard model backgrounds. The results are interpreted using simplified models describing the pair production and decays of charginos or τ sleptons. For models describing the pair production of the lightest chargino, exclusion regions are obtained in the plane of chargino mass vs. neutralino mass under the following assumptions: the chargino decays into third-generation sleptons, which are taken to be the lightest sleptons, and the sleptons masses lie midway between those of the chargino and the neutralino. Chargino masses below 420 GeV are excluded at a 95% confidence level in the limit of a massless neutralino, and for neutralino masses up to 100 GeV, chargino masses up to 325 GeV are excluded at 95% confidence level. Constraints are also placed on the cross section for pair production of τ sleptons as a function of mass, assuming a massless neutralino. Keywords: Hadron-Hadron scattering (experiments); Supersymmetry
MIT Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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Creative Commons Attribution 4.0 International License
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DOI of Published Version
https://doi.org/10.1007/JHEP04(2017)018
