EPJ

2021 Impact factor 3.131
EPJ A - Hadrons and Nuclei
Hadrons and Nuclei
Eur. Phys. J. A 9, 269-276

Pion and kaon electromagnetic form factors in a ${SU_L(3)\otimes SU_R(3)}$ effective Lagrangian

Yun Chang Shin1 - Bong Soo Han1 - Myung Ki Cheoun1,2 - K.S. Kim1 - Il-Tong Cheon1

1 Department of Physics, Yonsei University, Seoul, 120-749, Korea
2 IUCNSF, Seoul National University, 151-742 Korea
cheoun@phya.snu.ac.kr

Received: 20 December 1999 / Revised version: 19 August 2000
Communicated by A. Schäfer

Abstract
A SU(2) effective Lagrangian is extended to a ${SU_{\rm L}(3)\otimes SU_{\rm R}(3)}$ by including the vector and axial vector meson. With this effective Lagrangian, electromagnetic form factors of charged pion and kaon are calculated in both time- and space-like regions. The pseudoscalar meson loops are taken into account. Good agreement with experimental data is obtained for those form factors and charged pseudoscalar meson radii. Decay widths of $\rho\rightarrow \pi\pi$ and $\phi\rightarrow K^{+}K^{-}$ are also calculated and shown to agree with experimental data very well.

PACS
12.39.Fe Chiral Lagrangians - 12.40.Vv Vector-meson dominance - 13.40.Gp Electromagnetic form factors - 14.40.Ev Other strange mesons

Copyright Società Italiana di Fisica, Springer-Verlag 2000

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