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arXiv · 1405.3373

Breakdown of QCD Factorization for P-Wave Quarkonium Production at Low Transverse Momentum

J. P. Ma·J. X. Wang·S. Zhao
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Abstract

Quarkonium production at low transverse momentum in hadron collisions can be used to extract Transverse-Momentum-Dependent(TMD) gluon distribution functions, if TMD factorization holds there. We show that TMD factorization for the case of P-wave quarkonium with $J^{PC}=0^{++}, 2^{++}$ holds at one-loop level, but is violated beyond one-loop level. TMD factorization for other P-wave quarkonium is also violated already at one-loop.

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J. P. Ma, J. X. Wang, S. Zhao. 2014-08-28. Breakdown of QCD Factorization for P-Wave Quarkonium Production at Low Transverse Momentum. https://doi.org/10.1016/j.physletb.2014.08.033

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