2020 Impact factor 3.043
Hadrons and Nuclei

Eur. Phys. J. A 10, 237-244

$\bf {K_{l4}}$ decays

Bing An Li

Department of Physics and Astronomy, University of Kentucky Lexington, KY 40506, USA


(Received: 17 October 2000 / Revised version: 12 February 2001 Communicated by W. Weise)

An effective theory of large-NC QCD of pseudoscalar, vector, and axial-vector mesons has been used to study six Kl4 decay modes. It has been found that the matrix elements of the axial-vector current dominate the Kl4 decays. PCAC is satisfied. A relationship between three form factors of the axial-vector current has been predicted. Partial-wave analysis has been done. Non-zero phase shifts are originated in $\rho\rightarrow\pi\pi$. The decay rates are calculated in the chiral limit. In this study there is no adjustable parameter.

13.25.-R - Hadronic decays of mesons.

© Società Italiana di Fisica, Springer-Verlag 2001