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

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

2008-10-09

arxiv.org/abs/0810.1597v1

JHEP 0901:038,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

22 pages, 8 figures

Scientific paper

10.1088/1126-6708/2009/01/038

We compute the last missing piece of the two-loop ${\cal O}(\alpha \alpha_s)$
corrections to $\gamma t \bar{t}$ 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.

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