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T: Fachverband Teilchenphysik

T 27: BSM Suchen III (Vektorartige Quarks)

T 27.1: Talk

Monday, February 29, 2016, 16:45–17:00, VMP6 HS B

Search for singly-produced vector-like quarks in lepton and jets final state with the ATLAS detector in run-II — •Dustin Biedermann, Janet Dietrich, Sergio Grancagnolo, Heiko Lacker, and Dennis Sperlich — Humboldt-Universität zu Berlin

Vector-like quarks are predicted by many extensions of the Standard Model of particle physics. They provide the possiblity to solve some long-standing problems such as the hierarchy problem and also might help to explain the b-quark forward-backward asymmetry in e⁺e⁻ collisions measured at LEP. Candidates for these vector-like quarks are the top-like T and the Y quark. The Y quarks decay exclusively into a W-boson and a b-quark, which appears also to be the dominant decay channel of the T quarks.

We present the search strategy for singly-produced T/Y quarks and the expected sensitivity using the first LHC run-II data recorded by the ATLAS detector in 2015.