Long vs. short distance dispersive two-photon K_L \to \mu^+ \mu^- amplitude
High Energy Physics - Phenomenology
2007-05-23 v1
Abstract
We report on the calculation of the two-loop electroweak, two-photon mediated short-distance dispersive K_L \to \mu^+\mu^- decay amplitude. QCD corrections change the sign of this contribution and reduce it by an order of magnitude. The resulting amplitude enables us to provide a constraint on the otherwise uncertain long-distance dispersive amplitude.
Keywords
Cite
@article{arxiv.hep-ph/9901372,
title = {Long vs. short distance dispersive two-photon K_L \to \mu^+ \mu^- amplitude},
author = {J. O. Eeg and K. Kumericki and I. Picek},
journal= {arXiv preprint arXiv:hep-ph/9901372},
year = {2007}
}
Comments
5 pages, 2 figures, presented by K.K. on the conference "Nuclear and Particle Physics with CEBAF", Dubrovnik, Croatia, Nov 3-10, 1998