Eur. Phys. J. C 20, 333-342
DOI: 10.1007/s100520100672

HQET quark-gluon vertex at one loop

A.I. Davydychev¹ and A.G. Grozin<sup>2

1</sup>  Department of Physics, University of Mainz, Staudinger Weg 7, 55099 Mainz, Germany
²  Budker Institute of Nuclear Physics, Novosibirsk 630090, Russia

(Received: 8 March 2001 / Published online: 18 May 2001 -© Springer-Verlag / Società Italiana di Fisica 2001)

Abstract
We calculate the HQET quark-gluon vertex at one loop, for arbitrary external momenta, in an arbitrary covariant gauge and space-time dimension. Relevant results and algorithms for the three-point HQET integrals are presented. We also show how one can obtain the HQET limit directly from QCD results for the quark-gluon vertex.

© Società Italiana di Fisica, Springer-Verlag 2001