A study of transverse charge density of pions in relativistic quantum mechanics

摘要

The transverse charge density of pions is calculated based on relativistic quantum mechanics,where the pion is regarded as a quark-antiquark bound state.Corrections from the two spin-1/2 constituents and from the wave function of a quark and antiquark inside the bound system are discussed.The calculated results are compared to the results with a realistic effective Lagrangian approach as well as to that with a simple covariant model where the pion is regarded as a composite system with two scalar particles.