Chiral-odd GPDs in the bag model

Apr 17, 2024
21 pages
Published in:
  • Phys.Rev.D 110 (2024) 5, 5
  • Published: Sep 1, 2024
e-Print:
DOI:

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Abstract: (APS)
A study of chiral-odd generalized parton distributions (GPDs) of the nucleon is presented in the bag model demonstrating that in this model all four chiral-odd GPDs are nonzero contrary to other claims in literature. The bag model results for the GPDs HTq(x,ξ,t), ETq(x,ξ,t), H˜Tq(x,ξ,t) agree with other models within a typical quark model accuracy. We present one of the few quark model calculations where polynomiality is satisfied and the sum rule dxE˜Tq(x,ξ,t)=0 holds. We confront our results with predictions from the large-Nc limit, and with lattice QCD calculations. We conclude that the bag model successfully catches the main features of chiral-odd GPDs.
Note:
  • 21 pages, 9 figures, 2 tables v2: minor corrections, references added
  • expansion 1/N: color
  • parton: distribution function
  • generalized parton distribution
  • bag model
  • quark model
  • sum rule
  • nucleon
  • lattice field theory