QCD corrections to the production of $t\bar{t}\gamma$ at the ILC

Abstract

A precise calculation of the top quark pair production associated with a hard photon is essential for testing the electroweak property of the top quark in the Standard Model (SM). We investigate the one-loop QCD corrections to the process $e^{+}{e}^{-}\to t\bar{t}\gamma$ at the International Linear Collider (ILC), and find that the $K$-factor can be as large as 1.238 (1.105, 1.060) for a center-of-mass energy $\sqrt{s}=500(800,1500)$ GeV. The transverse momentum distributions of the top quark and photon are respectively shown at leading order (LO) and next-to-leading order(NLO). Due to the asymmetric rapidity distribution of the top (anti-top) quark, we also study the top quark forward-backward asymmetry ($A_{FB}^t$) in $t\bar{t}\gamma$ production at NLO, which is found to be 45.82 (55.25, 55.89)% for $\sqrt{s}=500(800,1500)$ GeV.

12 pages, 5 figures, version acceptd by Phys. Lett. B

References in corpus (4)

• QCD corrections to top quark pair production in association with a photon at hadron colliders
• Determination of the width of the top quark
• The top quark electric dipole moment in an MSSM extension with vector like multiplets
• Review of Properties of the Top Quark from Measurements at the Tevatron

Cited by in corpus (4)

• Implications of CP-violating Top-Higgs Couplings at LHC and Higgs Factories
• Full one-loop electroweak corrections to $e^{+}{e}^{-}\to ZH\gamma$ at a Higgs factory
• Next-to-leading order QCD corrections to $HZ{W}^{\pm }$ production at 14 TeV LHC
• Associated production of the $Z$ boson with a pair of top quarks in the left-right twin Higgs model