QCD corrections to the production of ttγ at the ILC

الأصل · EN

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⁻ → ttγ 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 √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 (AᵗFB) in ttγ production at NLO, which is found to be 45.82 (55.25, 55.89)% for √s=500 (800, 1500) GeV.