Münster 2017 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 9: Suche nach neuen Teilchen 1
T 9.1: Gruppenbericht
Montag, 27. März 2017, 16:45–17:05, JUR 2
Search for singly-produced vector-like quarks in lepton and jets final state with the ATLAS detector in run-II — •Dustin Biedermann1, Anjishnu Bandyopadhyay4, Ian Brock4, Janet Dietrich1, Heiko Lacker1, Dennis Sperlich1, Tobias Kupfer2, Johannes Erdmann2, Danilo Ferreira de Lima3, Ferdinand Schenck1, and Didier Alexandre1 — 1Humboldt-Universität zu Berlin — 2Technische Universität Dortmund — 3Universität Heidelberg — 4Universität Bonn
Vector-like quarks are predicted by many extensions of the Standard Model of particle physics. They provide the possibility 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 in a T-singlet model.
We present the search strategy, the results of the limit setting procedure and the interpretation of the limits in terms of the couplings to third generation quarks for singly-produced T/Y quarks using the LHC run-II data recorded by the ATLAS detector in 2015 and 2016.