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TTP08-43 O(ααs) corrections to the γtˉt vertex at the top quark threshold

TTP08-43 O(ααs) corrections to the γtˉt vertex at the top quark threshold

TTP08-43 O(ααs) corrections to the γtˉt vertex at the top quark threshold

We compute the last missing piece of the two-loop O(ααs) corrections to γtˉt vertex at the tˉt 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.

Yuichiro Kiyo, Dirk Seidel, Matthias Steinhauser
JHEP 0901 038 2009
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