Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

Taming the end-point singularities in heavy-to-light-quark decays

Taming the end-point singularities in heavy-to-light-quark decays It is argued that there is a fundamental momentum cutoff in heavy-to-light transitions, which is caused by possible Cherenkov gluon radiation when an energetic light parton travels through the “brown muck.” The soft-overlap contributions where the partonic momenta configuration is highly asymmetric are disfavored, and the problematic end-point singularities and the double countings are absent in this framework. A simple calculation with a natural scale for the cutoff gives a plausible result for the B → π form factor. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review D American Physical Society (APS)

Taming the end-point singularities in heavy-to-light-quark decays

Physical Review D , Volume 75 (3) – Feb 1, 2007
4 pages

Loading next page...
 
/lp/american-physical-society-aps/taming-the-end-point-singularities-in-heavy-to-light-quark-decays-289lRZGQro

References

References for this paper are not available at this time. We will be adding them shortly, thank you for your patience.

Publisher
American Physical Society (APS)
Copyright
Copyright © 2007 The American Physical Society
ISSN
1550-2368
DOI
10.1103/PhysRevD.75.031501
Publisher site
See Article on Publisher Site

Abstract

It is argued that there is a fundamental momentum cutoff in heavy-to-light transitions, which is caused by possible Cherenkov gluon radiation when an energetic light parton travels through the “brown muck.” The soft-overlap contributions where the partonic momenta configuration is highly asymmetric are disfavored, and the problematic end-point singularities and the double countings are absent in this framework. A simple calculation with a natural scale for the cutoff gives a plausible result for the B → π form factor.

Journal

Physical Review DAmerican Physical Society (APS)

Published: Feb 1, 2007

There are no references for this article.