A sum rule from the shape function
High Energy Physics - Phenomenology
2007-05-23 v2
Abstract
We present a sum rule relating the electron energy spectrum and the hadron mass distribution in semileptonic b -> u decays close to threshold. The relation found is free from non-perturbative effects and the theoretical error is expected to be O(5%). An experimental confirmation of this prediction can provide a check of the basic assumptions at the root of the theory of the shape function.
Cite
@article{arxiv.hep-ph/0010251,
title = {A sum rule from the shape function},
author = {U. Aglietti},
journal= {arXiv preprint arXiv:hep-ph/0010251},
year = {2007}
}
Comments
LaTeX file, 7 pages, no figures; minor changes, details on the derivation of the one-loop coefficient function added