Probing the gravitational form factors from near threshold heavy quarkonium photoproduction
ORAL
Abstract
I will talk about the recent development on the exclusive near threshold photoproduction of heavy quarkonium in the generalized parton distribution (GPD) framework. I will discuss the relation between the Compton-like amplitudes, especially their real parts, and the gravitational form factors that are crucial for the understanding of the mechanic properties and higher-dimensional structure of the nucleon. Utilizing recent measurements of near-threshold J/psi photoproduction, I will describe how such a framework can be tested with these measurements and allows for the potential extraction of the gluonic gravitational form factors from them.
* This talk is based upon work supported by the LDRD program of LBNL, and by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics, under contract numbers DE-AC02-05CH11231. The authors also acknowledge partial support by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under the umbrella of the Quark-Gluon Tomography (QGT) Topical Collaboration with Award DE-SC0023646.
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Publication: arxiv: 2305.06992
arxiv: 2308.13006
Presenters
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Yuxun Guo
Lawrence Berkeley National Laboratory
Authors
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Yuxun Guo
Lawrence Berkeley National Laboratory
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Feng Yuan
Lawrence Berkeley National Laboratory
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Xiangdong Ji
University of Maryland, College Park