We review on the calculation of the heavy-quark photo-production vector form factors, with the full dependence oil the mass of the heavy-quark. The Feynman diagrams are evaluated within the dimensional regularization scheme and expressed in Laurent series of epsilon = (4 - D)/2, where D is the space-time dimension. The coefficients of the expansion are expressed in terms of harmonic poly logarithms. The numerical evaluation of the analytical formulas and the threshold limit. of our results are presented.
Two-loop QCD corrections to the vector form factors for the heavy-quark photo-production / BONCIANI, ROBERTO. - In: NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS. - ISSN 0920-5632. - STAMPA. - 152:(2006), pp. 168-171. (Intervento presentato al convegno 11th International Conference in Quantum ChromoDynamics (QCD 04) tenutosi a Montpellier, France nel 5-9 Jul 2004) [10.1016/j.nuclphysbps.2005.08.032].
Two-loop QCD corrections to the vector form factors for the heavy-quark photo-production
BONCIANI, ROBERTO
2006
Abstract
We review on the calculation of the heavy-quark photo-production vector form factors, with the full dependence oil the mass of the heavy-quark. The Feynman diagrams are evaluated within the dimensional regularization scheme and expressed in Laurent series of epsilon = (4 - D)/2, where D is the space-time dimension. The coefficients of the expansion are expressed in terms of harmonic poly logarithms. The numerical evaluation of the analytical formulas and the threshold limit. of our results are presented.
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