Off-shell generalized parton distributions and form factors of the pion

Article Physics, Multidisciplinary

Accessing the Pion 3D Structure at US and China Electron-Ion Colliders

Jose Manuel Morgado Chavez et al.

Summary: This study presents the first systematic feasibility analysis of accessing the generalized parton distributions (GPDs) of the pion at an electron-ion collider using deeply virtual Compton scattering. The interference between quarks and gluons is found to be destructive, leading to modulation of the expected event rate. The event rate is maximized when the parton content is generated through radiation from valence dressed quarks. Furthermore, gluons are observed to induce a sign inversion for the beam-spin asymmetry, providing a clear signal for identifying the regime of gluon dominance.

PHYSICAL REVIEW LETTERS (2022)

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Article Physics, Nuclear

Revealing the structure of light pseudoscalar mesons at the electron-ion collider

J. Arrington et al.

Summary: The emergence of the bulk of the Universe's visible mass and the mechanisms behind the structure of hadrons are profound questions that are being investigated through the study of pseudoscalar mesons like the pion and kaon. Different approaches such as continuum QCD phenomenology, lattice-regularised QCD, and global analysis of parton distributions are being utilized to explore the partonic structure and mass mechanisms of these mesons. Experimental measurements, including those from the anticipated electron-ion collider, will provide valuable insights into the structures of pions and kaons, aiding in a better understanding of their properties and roles in QCD.

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS (2021)

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Review Physics, Nuclear