Unitarity and vector meson contributions to K^+ -> pi^+ gamma gamma
High Energy Physics - Phenomenology
2009-10-28 v1
Abstract
We compute the one-loop unitarity corrections O(p^6) from K^+ -> pi^+ pi^+ pi^- to K^+ -> pi^+ gamma gamma and we find they are relevant, increasing the leading order prediction for the width in a 30-40%. The contributions of local O(p^6) amplitudes, generated by vector meson exchange, are discussed in several models and we conclude that the vector resonance contribution should be negligible compared to the unitarity corrections.
Cite
@article{arxiv.hep-ph/9606213,
title = {Unitarity and vector meson contributions to K^+ -> pi^+ gamma gamma},
author = {G. D'Ambrosio and J. Portoles},
journal= {arXiv preprint arXiv:hep-ph/9606213},
year = {2009}
}
Comments
15 pages, LaTex, 4 figures included as PS files, uuencoded with uufiles, submitted to Phys. Lett. B