Exclusive quarkonium production in high energy e-p collision

doi:10.7523/j.issn.2095-6134.2019.06.002

Abstract

Abstract: Quarkonium production and decay play an important role in the investigations of quantum chromodynamics(QCD) and the properties of quarkonium and other high energy interactions and particles. In this work, we calculate the heavy quarkonium exclusive production in electron-proton scattering, and find that it may deepen our understanding of the parton structure of nucleon, testify the non-relativistic QCD(NRQCD) formalism, and specify the applicability scope of perturbative QCD(pQCD). Within the collinear factorization framework, we analytically calculate the amplitude and cross section of quarkonium exclusive production at the leading order of pQCD. Taking the HERA experiment of photoproduction and electroproduction as an example, we analyze phenomenologically the cross-section dependence of J/ψ and Υ production on Q² and W_γp. We estimate also the theoretical errors induced by the energy-scale and quark-mass uncertainties.

Key words: heavy quarkonium, exclusive production, GPDs, NRQCD

CLC Number:

O572.33

WANG Chen, CHEN Ziqiang, QIAO Congfeng. Exclusive quarkonium production in high energy e-p collision[J]. , 2019, 36(6): 729-735.

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