[Submitted on 8 Jun 2022] (cross-list from hep-ph)
Quark and gluon GPDs at finite skewness from strings in holographic QCD: evolved and compared to experiment
Kiminad A. Mamo🇺🇸 · Ismail Zahed🇺🇸
We present a framework for constructing Generalized Parton Distributions (GPDs) using holographic QCD in the large limit, with a focus on low-x and finite skewness. Our approach utilizes holographic amplitudes for exclusive electroproduction processes to extract the spin-j conformal (Gegenbauer) moments of GPDs, which are then evolved to higher resolution scales using QCD evolution equations. Our evolved GPDs (reconstructed from their evolved conformal moments) are applied to analyze the electroproduction of and mesons, and we account for non-perturbative contributions in the - channel using holographic QCD. The results compare well with the existing experimental data. Our GPDs provide detailed information about partonic distributions and are useful for future experimental studies and global data analyses.
- Comments:
- v3: 79 pages (including 43 pages of appendix), reorganized for clarity, updated 1 table, updated 15 figures
- Subjects:
- High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); High Energy Physics — Theory (hep-th); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
- arXiv:
- 2206.03813 [pdf]