Work

Impact parameter and transverse charge densities of the pion and kaon

Year: 2026

Type: preprint

Abstract: The impact parameter and transverse charge densities provide spatially resolved information on hadron structure and probe the interplay between dynamical chiral symmetry breaking and SU(3)-flavor symmetry breaking. We investigate the valence-quark distributions of the pion and kaon using their unpolarized vector GPDs at nonzero skewness $ξ$ within the covariant Nambu--Jona-Lasinio model, with ultraviolet divergences regulated by the Schwinger proper-time scheme. Increasing $ξ$ shifts the distributions toward smaller $x$, reduces their central magnitude at $b_\perp=0$, and broadens their transverse profiles. These results provide insight into the spatial structure of the pion and kaon and offer stringent tests of nonperturbative QCD dynamics, with relevance to forthcoming measurements at Jefferson Lab and the Electron-Ion Collider.

Source: arXiv (Cornell University)

DOI: 10.48550/arxiv.2609.25780

Authors: Chandra, Fernando, Hutauruk, Parada T. P., Mart, Terry

Institutions: University of Regina, University of Indonesia, Hiroshima University, International Institute for Sustainability with Knotted Chiral Meta Matter

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Strong, Ministry of Education, Culture, Sports, Science and Technology, Universitas Indonesia

Awards: G2983579501, G5739563252, G795700397

OpenAlex ID: W7214093545

Cites: 33

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Related to: 10