Dynamical bag in a chiral quark model

2013/08/03 by Duojie Jia, Jia, Duojie, Lianchun Yu +3
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.1308.0700

openalex publication_date 2013/08/03 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

A type of bag function is proposed to make the MIT bag surface of baryon dynamical. It is illustrated through renormalization of the quark field that the softening of chiral bag gives rise to a model of chiral quark with effectively-generated mass of quark, in which confined quark moves in the background of nonlinear pion. A prediction of bag constant B ≃ 2f_π²m_π²\allowbreak is made. With two free parameters, the self-coupling e of pion and the confining scale a, the computed mass, the charge root-mean-square radius and magnetic moment of the proton are in good agreement with the experimental values.

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