TY  - SER
AU  - Aad,G.
AU  - Abbott,B.
AU  - Abbott,D.C.
AU  - Aliev,M.
AU  - Kostyukhin,Vadim V.
AU  - Kuchinskaya,Olesya I.
AU  - Penzin,Maxim S.
TI  - Search for long-lived charginos based on a disappearing-track signature using 136 fb−1 of pp collisions at √s = 13 TeV with the ATLAS detector
KW  - протон-протонные столкновения
KW  - ATLAS, детектор
KW  - Большой адронный коллайдер
KW  - столкновение частиц
KW  - чарджино
KW  - глюино
KW  - статьи в журналах
N1  - Библиогр.: 80 назв
N2  - A search for long-lived charginos produced either directly or in the cascade decay of heavy prompt gluino states is presented. The search is based on proton- proton collision data collected at a centre-of-mass energy of root s = 13 TeV between 2015 and 2018 with the ATLAS detector at the LHC, corresponding to an integrated luminosity of 136 fb(-1). Long-lived charginos are characterised by a distinct signature of a short and then disappearing track, and are reconstructed using at least four measurements in the ATLAS pixel detector, with no subsequent measurements in the silicon-microstrip tracking volume nor any associated energy deposits in the calorimeter. The final state is complemented by a large missing transverse-momentum requirement for triggering purposes and at least one high-transversemomentum jet. No excess above the expected backgrounds is observed. Exclusion limits are set at 95% confidence level on the masses of the chargino and gluino for different chargino lifetimes. Chargino masses up to 660 (210) GeV are excluded in scenarios where the chargino is a pure wino (higgsino). For charginos produced during the cascade decay of a heavy gluino, gluinos with masses below 2.1 TeV are excluded for a chargino mass of 300 GeV and a lifetime of 0.2 ns
UR  - http://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001000947
ER  -