NRQCD Factorization and Velocity-dependence of NNLO Poles in Heavy Quarkonium Production

Details NRQCD Factorization and Velocity-dependence of NNLO Poles in Heavy Quarkonium Production NRQCD Factorization and Velocity-dependence of NNLO Poles in Heavy Quarkonium Production

2006-08-05

arxiv.org/abs/hep-ph/0608066v1

Phys.Rev.D74:074007,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

23pages latex, 2 figures

Scientific paper

10.1103/PhysRevD.74.074007

We study the transition of a heavy quark pair from octet to singlet color configurations at next-to-next-to-leading order (NNLO) in heavy quarkonium production. We show that the infrared singularities in this process are consistent with NRQCD factorization to all orders in the heavy quark relative velocity v. This factorization requires the gauge-completed matrix elements that we introduced previously to prove NNLO factorization to order v ^2.

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