Search for top squarks decaying via four-body or chargino-mediated modes in single-lepton final states in proton-proton collisions at s√=13s=13 TeV

Search for top squarks decaying via four-body or chargino-mediated modes in single-lepton final states in proton-proton collisions at s√=13s=13 TeV

書目詳細資料
Parent link:Journal of High Energy Physics
Vol. 2018, iss. 9.— 2018.— [65, 47 p.]
企業作者: Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов
其他作者: Sirunyan A. M., Tumasyan A. R., Adam W. Wolfgang, Ambrogi F. Federico, Asilar E. Ece, Bergauer T. Thomas, Babaev A. A. Anton Anatoljevich
總結:Title screen
A search for the pair production of the lightest supersymmetric partner of the top quark (t~1)(t~1) is presented. The search focuses on a compressed scenario where the mass difference between the top squark and the lightest supersymmetric particle, often considered to be the lightest neutralino (χ~01)(χ~10), is smaller than the mass of the W boson. The proton-proton collision data were recorded by the CMS experiment at a centre-of-mass energy of 13 TeV, and correspond to an integrated luminosity of 35.9 fb−1. In this search, two decay modes of the top squark are considered: a four-body decay into a bottom quark, two additional fermions, and a χ~01χ~10; and a decay via an intermediate chargino. Events are selected using the presence of a high-momentum jet, significant missing transverse momentum, and a low transverse momentum electron or muon. Two analysis techniques are used, targeting different decay modes of the t~1t~1: a sequential selection and a multivariate technique. No evidence for the production of top squarks is found, and mass limits at 95% confidence level are set that reach up to 560 GeV, depending on the m(t~1)−m(χ~01)m(t~1)−m(χ~10) mass difference and the decay mode.
Режим доступа: по договору с организацией-держателем ресурса
出版: 2018
主題:
электронный ресурс
труды учёных ТПУ
hadron-hadron scattering (experiments)
supersymmetry
адрон-адронное рассеяние
суперсимметрии
在線閱讀:https://doi.org/10.1007/JHEP09(2018)065
格式: 電子 Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=660725

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