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QCD analysis of near-threshold photon-proton production of heavy quarkonium

URN to cite this document:
urn:nbn:de:bvb:355-epub-517544
DOI to cite this document:
10.5283/epub.51754
Guo, Yuxun ; Ji, Xiangdong ; Liu, Yizhuang
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Date of publication of this fulltext: 20 Feb 2022 15:37



Abstract

The near-threshold photo or electroproduction of heavy vector quarkonium off the proton is studied in quantum chromodynamics. Similar to the high-energy limit, the production amplitude can be factorized in terms of gluonic generalized parton distributions and the quarkonium distribution amplitude. At the threshold, the threshold kinematics has a large skewness parameter xi, leading to the ...

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