Relativistic and Binding Energy Corrections to Direct Photon Production In Upsilon Decay
High Energy Physics - Phenomenology
2009-10-28 v1
Abstract
A systematic gauge-invariant method is used to calculate the rate for an upsilon meson to decay inclusively into a prompt photon. An expansion is made in the quark relative velocity v, which is a small natural parameter for heavy quark systems. Inclusion of these O(v^2) corrections tends to increase the photon rate in the middle z range and to lower it for larger z, a feature supported by the data.
Keywords
Cite
@article{arxiv.hep-ph/9608244,
title = {Relativistic and Binding Energy Corrections to Direct Photon Production In Upsilon Decay},
author = {Mohammad Ali Yusuf and Pervez Hoodbhoy},
journal= {arXiv preprint arXiv:hep-ph/9608244},
year = {2009}
}
Comments
13 pages, LateX, One figure (to be published in Phys. Rev. D, Sept. 1, 1996)