Search for electroweak production of charginos in final states with two tau leptons in pp collisions at sqrt(s) = 8 TeV

Abstract : Results are presented from a search for the electroweak production of supersymmetric particles in pp collisions in final states with two tau leptons. The data sample corresponds to an integrated luminosity between 18.1 inverse femtobarns and 19.6 inverse femtobarns at sqrt(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 tau sleptons. For chargino pair production, assuming that the third-generation sleptons are the lightest sleptons and that their masses lie midway between that of the chargino and the lightest neutralino, an excluded region in the plane of the neutralino mass vs. chargino mass is obtained. 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 tau sleptons as a function of mass, assuming a massless neutralino.
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Submitted on : Wednesday, December 12, 2018 - 8:26:52 AM
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V. Khachatryan, M. Besançon, F. Couderc, M. Dejardin, D. Denegri, et al.. Search for electroweak production of charginos in final states with two tau leptons in pp collisions at sqrt(s) = 8 TeV. Journal of High Energy Physics, Springer Verlag (Germany), 2017, 04 (4), pp.018. ⟨10.1007/JHEP04(2017)018⟩. ⟨in2p3-01383031⟩

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