Hamburg 2016 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 81: BSM Suchen V (Leptoquarks und exotische top-Quarks)
T 81.4: Vortrag
Mittwoch, 2. März 2016, 17:30–17:45, VMP9 SR 28
Search for pair production of leptoquarks decaying into a top quark and a muon at the CMS experiment — Johannes Haller, Roman Kogler, Thomas Peiffer, •Arne Reimers, and Marc Stöver — Institut für Experimentalphysik, Universität Hamburg
In this talk we present a search for pair produced scalar leptoquarks in pp-collisions of √s=13 TeV. The data have been collected by the CMS experiment in 2015. Leptoquarks are hypothetical particles with simultaneous couplings to quarks and leptons. In this analysis, the decay channel of scalar leptoquarks decaying into a top quark and a muon is studied. Therefore the basic event signature are muons and jets.
In the event selection possible leptoquark events are enriched and the standard model background is reduced as much as possible. In events containing additional electrons, the 4-momentum of top quark candidates is calculated from information of the leading electron, missing transverse energy and at least one jet. Leptoquark hypotheses are then tested via a χ 2 minimization using top quark candidates and muons. A data driven method for the estimation of the dominant standard model background is presented. The expected sensitivity to leptoquarks and exclusion limits are derived.