We evaluate the two-loop QCD diagrams contributing to the leading color coefficient of the heavy-quark pair production cross section in the gluon fusion channel. We obtain an analytic expression, which is valid for any value of the Mandelstam invariants s and t and of the heavy-quark mass m. Our findings agree with previous analytic results in the small-mass limit and with recent results for the coefficients of the IR poles.
Two-loop leading color corrections to heavy-quark pair production in the gluon fusion channel / Bonciani, Roberto; A., Ferroglia; T., Gehrmann; A., Von Manteuffel; C., Studerus. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1126-6708. - 2011:1(2011). [10.1007/jhep01(2011)102]
Two-loop leading color corrections to heavy-quark pair production in the gluon fusion channel
BONCIANI, ROBERTO;
2011
Abstract
We evaluate the two-loop QCD diagrams contributing to the leading color coefficient of the heavy-quark pair production cross section in the gluon fusion channel. We obtain an analytic expression, which is valid for any value of the Mandelstam invariants s and t and of the heavy-quark mass m. Our findings agree with previous analytic results in the small-mass limit and with recent results for the coefficients of the IR poles.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
