Extracting V_{ub} Without Recourse to Structure Functions
High Energy Physics - Phenomenology
2014-11-17 v2 High Energy Physics - Experiment
Abstract
We present a closed form expression for |V_{ub}|^2/ |V_{tb} V_{ts}^*|^2 in terms of the endpoint photon and lepton spectra from the inclusive decays B -> X_s\gamma and B -> X_u\ell\nu, respectively, which includes the resummation of the endpoint logs at next to leading order and is completely independent of the B meson structure function. The use of this expression for extracting V_{ub} would eliminate the large systematic errors usually incurred due to the modeling of the heavy quarks' Fermi motion.
Cite
@article{arxiv.hep-ph/9909404,
title = {Extracting V_{ub} Without Recourse to Structure Functions},
author = {Adam K. Leibovich and Ian Low and I. Z. Rothstein},
journal= {arXiv preprint arXiv:hep-ph/9909404},
year = {2014}
}
Comments
20 pages, no figures, minor typos corrected