Photoproduction of near threshold
Apr 4, 202425 pages
Published in:
- Phys.Rev.D 110 (2024) 5, 054025
- Published: Sep 1, 2024
e-Print:
- 2404.03875 [hep-ph]
DOI:
- 10.1103/PhysRevD.110.054025 (publication)
View in:
Citations per year
Abstract: (APS)
We analyze the photoproduction of off a proton in the threshold region, in terms of C-odd gluonic correlations in the off-forward proton matrix element. Near threshold, the skewness is large, leading to a production amplitude that is dominated by four C-odd twist-3 gluon GPDs. We use the QCD instanton vacuum to estimate these C-odd contributions in the proton. The results are used to estimate the differential cross sections for coherent photoproduction of in the threshold region, at current electron facilities.Note:
- 25 pages, 9 figures
- eta/c(2980): photoproduction
- eta/b: photoproduction
- charge conjugation
- quantum chromodynamics: instanton
- coherence
- generalized parton distribution
- higher-twist
- twist: 3
- differential cross section: calculated
- gluon: correlation
References(71)
Figures(18)
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