B+ and Ds+ Decay Constants from Belle and Babar
High Energy Physics - Experiment
2010-01-15 v1
Abstract
The Belle and Babar experiments have measured the branching fractions for B+ -> tau+ nu and Ds+ -> mu+ nu decays. From these measurements one can extract the B+ and Ds+ decay constants, which can be compared to lattice QCD calculations. For the Ds+ decay constant, there is currently a 2.1 sigma difference between the calculated value and the measured value.
Cite
@article{arxiv.0909.4473,
title = {B+ and Ds+ Decay Constants from Belle and Babar},
author = {A. J. Schwartz},
journal= {arXiv preprint arXiv:0909.4473},
year = {2010}
}
Comments
10 pages, 8 figures, 1 table, contribution to the Tenth Conference on the Intersections of Particle and Nuclear Physics (CIPANP 2009), San Diego, California