The Isgur-Wise function in the BPS limit
High Energy Physics - Phenomenology
2007-05-23 v1
Abstract
From sum rules in the heavy quark limit of QCD, using the non-forward amplitude, we demonstrate that if the slope rho^2 = -xsi'(1) of the Isgur-Wise function xsi(w) attains its lower bound 3/4 (as happens in the BPS limit proposed by Uraltsev), the IW function is completely determined, given by the function xsi(w) = [2/(w+1)]^(3/2).
Cite
@article{arxiv.hep-ph/0611031,
title = {The Isgur-Wise function in the BPS limit},
author = {F. Jugeau and A. Le Yaouanc and L. Oliver and J. -C. Raynal},
journal= {arXiv preprint arXiv:hep-ph/0611031},
year = {2007}
}