One-loop amplitudes for four-point functions with two external massive quarks and two external massless partons up toO(ε2)
- 27 February 2006
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 73 (3) , 034030
- https://doi.org/10.1103/physrevd.73.034030
Abstract
We present complete analytical O(ε2) results on the one-loop amplitudes relevant for the next-to-next-to-leading order (NNLO) quark-parton model description of the hadroproduction of heavy quarks as given by the so-called loop-by-loop contributions. All results of the perturbative calculation are given in the dimensional regularization scheme. These one-loop amplitudes can also be used as input in the determination of the corresponding NNLO cross sections for heavy flavor photoproduction, and in photon-photon reactions.Keywords
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