|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'501'711
Articles rated: 2609
20 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
Shape Functions from B -> X_c ell
u | | H. Boos
; Th. Feldmann
; T. Mannel
; B.D. Pecjak
; | | Date: |
1 Apr 2005 | | Subject: | hep-ph | | Affiliation: | Univ. Siegen, Germany | | Abstract: | We study inclusive semi-leptonic B -> X_c ell
u decay using the power counting m_c ~ (Lambda_{QCD} m_b)^1/2. Assuming this scaling for the charm-quark mass, the decay kinematics can be chosen to access the shape-function region even in b -> c transitions. To apply effective field theory methods in this region we extend SCET to describe massive collinear quarks. Working at tree level and including O(Lambda_{QCD}/m_b) power corrections, we show that the decay rate factorizes into a convolution of jet and shape functions. We identify a certain kinematical variable whose decay spectrum is proportional to the universal leading-order shape function familiar from b -> u decay, and speculate as to whether information about this shape function can be extracted from data on b -> c decay. | | Source: | arXiv, hep-ph/0504005 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER