Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

T: Fachverband Teilchenphysik

T 21: Top: tt+2 Photonen, tt+Z

T 21.2: Vortrag

Montag, 9. März 2015, 17:00–17:15, L.09.31 (HS 11)

Probing the top-quark photon vertex with the CMS detector — •Till Arndt¹, Heiko Geenen², Felix Höhle², and Heiner Tholen³ — ¹DESY Hamburg — ²III Phys. Inst. B, RWTH Aachen University — ³Universität Hamburg

The electromagnetic top-quark coupling is of essential interest to many models beyond the Standard Model as well as to background contribu- tion for Higgs searches. We investigate this coupling utilizing top-quark pair events with a photon in the final state with the CMS detector. We present an updated measurement of the cross section at a center-of-mass energy of √s= 8 TeV. This measurement is performed in the muon + jets channel using data taken in 2012. The result of σ_{t t + γ}^CMS =2.6 ±0.1 (stat.) ±0.5 (syst.) pb is compatible with the Standard Model prediction of σ_{t t + γ}^SM = 1.8± 0.5 pb.