Threshold corrections in bottom and charm quark hadroproduction at next-to-next-to-leading order期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Threshold corrections in bottom and charm quark hadroproduction at next-to-next-to-leading order

Authors:	N Kidonakis R Vogt

Institution:	(1) Cavendish Laboratory,, University of Cambridge,, Madingley Road, CB3 0HE Cambridge, UK;(2) Nuclear Science Division,, Lawrence Berkeley National Laboratory, CA 94720 Berkeley, USA;(3) Physics Department, University of California at Davis,, CA 95616 Davis, USA

Abstract:	We calculate threshold soft-gluon corrections to total cross sections and transverse momentum distributions for bottom and charm quark production in fixed target experiments, considering both pp and $\pi^- p$ interactions. We investigate the quality of the near-threshold soft-gluon approximation at next-to-leading order (NLO) and calculate next-to-next-to-leading order (NNLO) corrections through next-to-next-to-next-to-leading-logarithmic (NNNLL) accuracy, including some virtual terms. We find that the NNLO threshold corrections reduce the factorization and renormalization scale dependence of the cross sections.Received: 26 April 2004, Published online: 2 July 2004

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