4.7 Article

J/ψ near threshold in holographic QCD: A and D gravitational form factors

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PHYSICAL REVIEW D
卷 106, 期 8, 页码 -

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AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.106.086004

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  1. U.S. Department of Energy, Office of Science, Office of Nuclear Physics [DE-AC02-06CH11357]
  2. LDRD initiative at Argonne National Laboratory [2020-0020]
  3. Office of Science, U.S. Department of Energy [DE-FG-88ER40388]

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In this study, the diffractive photoproduction of J/'P on a nucleon is analyzed using a holographic QCD model. The predictions for this process are refined with new lattice data, and the scalar and mass radii of the nucleon are estimated using the results.
The diffractive photoproduction of J/'P on a nucleon is mostly due to gluonic exchanges at all ffis ffi p . In holographic QCD (large number of colors and strong 0t Hooft coupling), these exchanges are captured by gravitons near threshold, and their reggeized form (Pomeron) asymptotically. We revisit our holographic analysis of the A and D gravitational form factors in light of the new lattice data, and use them to refine our predictions for the photoproduction of J/'P near threshold, and the comparison to the GlueX data. We use these results to estimate the scalar and mass radii of the nucleon, and describe the gravitational pressure and shear across a nucleon.

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