Impact of JLab data on the determination of GPDs at zero skewness and new insights from transition form factors N→Δ
Physical Review D(2024)
摘要
It is well established now that the generalized parton distributions (GPDs)
at zero skewness are playing important roles in some physical process such as
elastic electron-nucleon scattering, elastic (anti)neutrino-nucleon scattering,
and wide-angle Compton scattering (WACS) via various types of form factors
(FFs). In this study, we are going to utilize the recent JLab measurements of
the elastic electron-nucleon scattering reduced cross-section, namely GMp12, as
a touchstone to unravel the tension observed between the measurements of the
WACS cross-section and the data of the proton magnetic FF G_M^p. We also
investigate the impact of GMp12 data on valence unpolarized GPDs H_v^q and
E_v^q at zero skewness by performing some χ^2 analyses of the
related experimental data. By calculating the electric and scalar quadrupole
ratios, R_EM and R_SM, and magnetic transition FF G^*_M/3G_D
related to the nucleon-to-delta (N→Δ) transition using the
extracted GPDs and comparing the results with corresponding experimental
measurements, we show that our results are in an excellent consistency with
experiments, indicating the universality property of GPDs. We emphasize that
the inclusion of these data in the future analysis of GPDs can significantly
the extracted GPDs especially their uncertainties at smaller values of Q^2.
更多查看译文
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要