${\cal O}(αα_s)$ corrections to the $γt\bar{t}$ vertex at the top quark threshold

2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/217375We compute the last missing piece of the two-loop ${\cal O}(αα_s)$ corrections to $γt \bar{t}$ vertex at the $t \bar{t}$ threshold due to the exchange of a $W$ boson and a gluon. This contribution constitutes a building block of the top quark threshold production cross section at electron positron colliders.22 pages, 8 figuresHigh Energy Physics - Phenomenology${\cal O}(αα_s)$ corrections to the $γt\bar{t}$ vertex at the top quark thresholdtext