Femtoscopy of the Matter Distribution in the Proton

• Autor(a) principal: Krein, Gastão [UNESP]
• Data de Publicação: 2023
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• DOI: 10.1007/s00601-023-01829-6
• Texto Completo: http://dx.doi.org/10.1007/s00601-023-01829-6; http://hdl.handle.net/11449/248941

This communication is a follow-up on our previous study [Few Body Syst. 61, 49 (2020)] suggesting the use of femtoscopic measurements of J/ ψ -proton correlation functions in high-energy hadron collisions to access information on the origin of the proton’s mass. The QCD multipole expansion allows us to express the J/ ψ -proton scattering amplitude in terms of the product of the J/ ψ chromopolarizability and a scalar gluon gravitational (GFF) form factor. The scalar gluon GFF gives the gluonic contribution to the nucleon mass and determines the corresponding matter radius. We show that J/ ψ -proton femtoscopic correlation function displays clear sensitivity to the scalar gluon GFF for a wide range of the J/ ψ chromopolarizability.