Work

Relativistic corrections to exclusive photoproduction of Quarkonia near-threshold

Year: 2025

Type: preprint

Abstract: Non-relativistic QCD (NRQCD) is used to calculate the relativistic correction to the amplitude for exclusive photoproduction of vector Quarkonia in the near-threshold region within the generalized parton distribution (GPD) framework. The relativistic corrections are found to be large for $J/ψ$, and lead to a breakdown of the GPD moment expansion near threshold. Cross-sections for both $J/ψ$ and $Υ$ are calculated with the former being compared to the data. We also demonstrate the presence of endpoint divergences for the relativistic correction away from the near-threshold regime.

Source: arXiv (Cornell University)

Authors: Blask, Sarah K., Fleming, Sean, Mehen, Thomas, Roy, Jyotirmoy, Stewart, Iain W., Zhao, Fanyi

Institutions: University of Arizona, Duke University, University of Vienna, Massachusetts Institute of Technology

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: U.S. Department of Energy, Nederlandse Organisatie voor Wetenschappelijk Onderzoek, Office of Science, Deutsches Elektronen-Synchrotron, Nuclear Physics

Awards: G1871073785, G222768804, EFFECTIVE THEORIES OF THE STRONG INTERACTION, G2399599801, G2476331794, FY 2014-2016 TASK R - THEORETICAL NUCLEAR PHYSICS, G5027663112, NUCLEAR PHYSICS AT EXTREME ENERGY DENSITY, EFFECTIVE THEORIES OF THE STRONG INTERACTION, FY 2014-2016 TASK R - THEORETICAL NUCLEAR PHYSICS, NUCLEAR PHYSICS AT EXTREME ENERGY DENSITY, NUCLEAR PHYSICS AT HIGH ENERGY DENSITY, EFFECTIVE THEORIES OF THE STRONG INTERACTION, G8571407123, 3D QUARK-GLUON STRUCTURE OF HADRONS: MASS, SPIN, AND TOMOGRAPHY, NUCLEAR PHYSICS AT HIGH ENERGY DENSITY

OpenAlex ID: W6979282105

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