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NRQCD Factorization and Velocity-dependence of NNLO Poles in Heavy Quarkonium Production
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NRQCD Factorization and Velocity-dependence of NNLO Poles in Heavy Quarkonium Production
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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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Cited by 1 Pith paper
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The role of the soft scale for $J/\psi$ production in the transverse momentum dependent framework
The paper derives new TMD soft transition functions and shows they dominate J/psi production at small transverse momentum by a factor of 1/v over previously used shape functions.
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