A search for pair production of a scalar partner of the top quark in events with four or more jets plus missing transverse momentum is presented. An analysis of 36.1 fbâ1of s=13 TeV proton-proton collisions collected using the ATLAS detector at the LHC yields no significant excess over the expected Standard Model background. To interpret the results a simplified supersymmetric model is used where the top squark is assumed to decay via tË1ât(â)ÏË10 and tË1âbÏË1±âbW(â)ÏË10, where Ï10(Ï1±) denotes the lightest neutralino (chargino). Exclusion limits are placed in terms of the top-squark and neutralino masses. Assuming a branching ratio of 100% to tÏË10, top-squark masses in the range 450â1000 GeV are excluded for ÏË10 masses below 160 GeV. In the case where mtË1â¼mt+mÏË10, top-squark masses in the range 235â590 GeV are excluded.
Search for a scalar partner of the top quark in the jets plus missing transverse momentum final state at sqrt s=13 TeV with the ATLAS detector
Conventi, F.;Di Donato, C.;Rossi, E.;
2017-01-01
Abstract
A search for pair production of a scalar partner of the top quark in events with four or more jets plus missing transverse momentum is presented. An analysis of 36.1 fbâ1of s=13 TeV proton-proton collisions collected using the ATLAS detector at the LHC yields no significant excess over the expected Standard Model background. To interpret the results a simplified supersymmetric model is used where the top squark is assumed to decay via tË1ât(â)ÏË10 and tË1âbÏË1±âbW(â)ÏË10, where Ï10(Ï1±) denotes the lightest neutralino (chargino). Exclusion limits are placed in terms of the top-squark and neutralino masses. Assuming a branching ratio of 100% to tÏË10, top-squark masses in the range 450â1000 GeV are excluded for ÏË10 masses below 160 GeV. In the case where mtË1â¼mt+mÏË10, top-squark masses in the range 235â590 GeV are excluded.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.