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arXiv · 2606.20998

Pion structure from its light-front wave function

Khépani Raya·Zhen-Ni Xu·Zhao-Qian Yao·José Rodríguez-Quintero
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Abstract

Understanding the structural properties of the pion is essential for elucidating the mechanisms of mass generation within the Standard Model and their role in the emergence and properties of the hadronic matter. Light-front wave functions encode extensive information about the internal structure of these systems and provide the link to measurable quantities such as generalized parton distributions and transverse-momentum-dependent distributions. Guided by recent progress in continuum Schwinger methods, we derive well-founded and practical representations of these quantities, enabling the exploration of several facets of the pion structure, including distribution amplitudes and distribution functions, elastic and gravitational form factors, and the associated momentum and spatial distributions. The results presented here are consistent with expectations and can be tested at modern experimental facilities, including the new generation of electron-ion colliders.

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Khépani Raya, Zhen-Ni Xu, Zhao-Qian Yao, José Rodríguez-Quintero. 2026-06-19. Pion structure from its light-front wave function. https://arxiv.org/abs/2606.20998

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