Color Transfer Enhancement for Heavy Quarkonium Production

Details Color Transfer Enhancement for Heavy Quarkonium Production Color Transfer Enhancement for Heavy Quarkonium Production

2007-11-21

arxiv.org/abs/0711.3476v2

Phys.Rev.D77:034022,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

23 pages, 8 figures, references updated, paper accepted for publication in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.77.034022

We study the transfer of color between a heavy quark pair and an unpaired heavy quark or antiquark moving at a nonrelativistic velocity with respect to the pair. We find that the open heavy quark or antiquark can catalyze the transformation of the pair from octet representation at short distances to singlet at long distances. This process is infrared sensitive in general, and we exhibit double poles in dimensional regularization at next-to-next-to-leading order in the transition probability. Because of their dependence on kinematic variables, these poles cannot be matched to the non-perturbative matrix elements of effective field theories based on a single heavy quark pair.

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