QCD factorization for hadronic quarkonium production at high p_T

2021/07/31 by Lee, Kyle, Qiu, Jian-Wei, Sterman, George +1
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Nuclear Theory (nucl-th)

paper · doi:10.48550/arxiv.2108.00305

Abstract

Heavy quarkonium production at high transverse momentum (p_T) in hadronic collisions is explored in the QCD factorization approach. We find that the leading power in the 1/p_T expansion is responsible for high p_T regime, while the next-to-leading power contribution is necessary for the low p_T region. We present the first numerical analysis of the scale evolution of coupled twist-2 and twist-4 fragmentation functions (FFs) for heavy quarkonium production and demonstrate that the QCD factorization approach is capable of describing the p_T spectrum of hadronic J/ψ production at the LHC.

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