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Exclusive quarkonium production in high energy e-p collision

  • WANG Chen ,
  • CHEN Ziqiang ,
  • QIAO Congfeng
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  • School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China

Received date: 2018-05-05

  Revised date: 2018-06-01

  Online published: 2019-11-15

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 Wγp. We estimate also the theoretical errors induced by the energy-scale and quark-mass uncertainties.

Cite this article

WANG Chen , CHEN Ziqiang , QIAO Congfeng . Exclusive quarkonium production in high energy e-p collision[J]. Journal of University of Chinese Academy of Sciences, 2019 , 36(6) : 729 -735 . DOI: 10.7523/j.issn.2095-6134.2019.06.002

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