Year: 2023
Type: article
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, θ 2 π . Compared with the pion elastic electromagnetic form factor, θ 2 π is harder: the ratio of the radii derived from these two form factors is r π θ 2 / r π = 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.
Source: Chinese Physics Letters
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4327955653