Work

Step toward estimation of the neutral-hadron size: The gravitational mass radius of π 0 meson in a relativistic theory of composite particles

Year: 2025

Type: article

Abstract: We extend our nonperturbative essentially relativistic approach, elaborated previously, to perform an approximate estimation of the size of π 0 meson. We present detailed argumentation for choosing the mass mean square radius (mass MSR) for this purpose. Its value calculated in our approach, using three model quark-antiquark wave functions in pion, is ( 0.5 – 0.53 ) fm . The neutral-pion electromagnetic form factor is zero in accordance with the charge-conjugation symmetry. We demonstrate ambiguities encountered when using standard definitions of mechanical MSR for the size. We discuss MSRs obtained in various approaches and their comparison with each other and with our results.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/physrevd.111.034034

Authors: A. F. Krutov, V. E. Troitsky

Institutions: Samara State Technical University, Lomonosov Moscow State University

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

OpenAlex ID: W4407904166

FWCI: 1.991

Cites: 66

Cited by: 8

Related to: 10