Mainz 2014 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 112: Top-Quarks: Assoziierte Produktion
T 112.5: Vortrag
Donnerstag, 27. März 2014, 17:45–18:00, P102
Investigation of Photons Associated with Top-Pair Production with the CMS Experiment — •Till Arndt1, Markus Backes1, Günter Flügge1, Heiko Geenen1, Felix Höhle1, Yvonne Küssel1, Claudia Pistone1, Oliver Pooth1, Achim Stahl1, and Heiner Tholen2 — 1III. Physikalisches Institut B, RWTH Aachen University, D-52056 Aachen — 2Universität Hamburg
The electromagnetic top-quark coupling is of essential interest to many models beyond the Standard Model as well as to background contribution for Higgs searches. We investigate this coupling utilizing top-quark pair events with a photon in the final state with the CMS detector. The analysis focuses on a cut-based muon plus jets selection requiring the photon to be high-energetic and well isolated. In order to achieve a precise measurement, a clear separation of photons and jets in the high jet-multiplicity environment of the signal signature is crucial. We will show preliminary results of the performance of the analysis. Additionally, this presentation will cover the simulation of events using Monte Carlo methods.