English

Once more about the $\omega \to 3\pi$ contact term

High Energy Physics - Phenomenology 2019-08-15 v1

Abstract

The manifestations of the ω3π\omega \to 3\pi contact term and its unitary partners are investigated in the framework of the chiral effective lagrangian theory with vector mesons. We conclude that nowadays the existence and magnitude of the contact term can be extracted neither from theory, nor experiment. The theoretical uncertainty is caused by the one-loop corrections. Some speculations about them lead to the generalized KSRF relation fπ2gρππ2mρ2=mK22πfπ\frac{f_\pi^2g^2_{\rho \pi \pi}}{m_\rho^2}=\frac{m_K}{2\sqrt{2} \pi f_\pi}.

Keywords

Cite

@article{arxiv.hep-ph/9502406,
  title  = {Once more about the $\omega \to 3\pi$ contact term},
  author = {E. A. Kuraev and Z. K. Silagadze},
  journal= {arXiv preprint arXiv:hep-ph/9502406},
  year   = {2019}
}

Comments

13 pages, LaTex, without some figures. To appear in Yad. Fiz.