Empirical Determination of the Pion Mass Distribution
Abstract
Existing pion+nucleus Drell-Yan and electron+pion scattering data are used to develop ensembles of model-independent representations of the pion generalized parton distribution (GPD). Therewith, one arrives at a data-driven prediction for the pion mass distribution form factor, ${\theta }_{2}^{\pi }$ . Compared with the pion elastic electromagnetic form factor, ${\theta }_{2}^{\pi }$ is harder: the ratio of the radii derived from these two form factors is ${r}_{\pi }^{{\theta }_{2}}/{r}_{\pi }=0.79(3)$ . Our data-driven predictions for the pion GPD, related form factors and distributions should serve as valuable constraints on theories of pion structure.
- Publication:
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Chinese Physics Letters
- Pub Date:
- March 2023
- DOI:
- 10.1088/0256-307X/40/4/041201
- arXiv:
- arXiv:2302.07361
- Bibcode:
- 2023ChPhL..40d1201X
- Keywords:
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- High Energy Physics - Phenomenology;
- High Energy Physics - Experiment;
- High Energy Physics - Lattice;
- Nuclear Experiment;
- Nuclear Theory
- E-Print:
- 9 pages, 6 figures, 1 table. Version accepted for publication as an Express Letter in Chin. Phys. Lett