The Lambda_b lifetime in the light front quark model
High Energy Physics - Phenomenology
2009-10-31 v3
Abstract
The enhancement of the Lambda_b decay width relative to B decay one due to the difference of Fermi motion effects in Lambda_b and B is calculated in the light--front quark model with the simplifying assumption that Lambda_b consists of the heavy quark and light scalar diquark. In order to explain the large deviation from unity in the experimental result for tau(Lambda_b)/tau(B), it is necessary that diquark be light and the ratio of the squares of the Lambda_b and B wave functions at the origin be \le 1.
Cite
@article{arxiv.hep-ph/0003325,
title = {The Lambda_b lifetime in the light front quark model},
author = {P. Yu. Kulikov and I. M. Narodetskii and A. I. Onischenko},
journal= {arXiv preprint arXiv:hep-ph/0003325},
year = {2009}
}
Comments
final journal version to appear in JETP Letters