Eur. Phys. J. C 23, 585-590 (2002)
https://doi.org/10.1007/s100520200904

Charge radii of light and heavy mesons

Department of Physics, National Tsing Hua University, Hsinchu 300, Taiwan

Corresponding author: ^a v00570@phys.nthu.edu.tw

Received: 18 December 2001
Revised: 18 January 2002
Published online: 15 March 2002

Abstract

We calculate the electromagnetic (EM) form factors of the pseudoscalar mesons in the light-front framework. Specifically, these form factors are directly extracted from the relevant matrix elements, instead of choosing the Breit frame. The results show that the charge radius of the meson is related to both the first and second longitudinal momentum square derivatives of the momentum distribution function. The static properties of the EM form factors and the heavy quark symmetry of the charge radii are checked analytically in the heavy quark limit. In addition, we use the Gaussian-type wavefunction to obtain the numerical results.