Can $B -> X_c \ell ν$ help us extract |V_{ub}| ?
| dc.creator | Boos, H. | |
| dc.creator | Feldmann, Th. | |
| dc.creator | Mannel, T. | |
| dc.creator | Pecjak, B. D. | |
| dc.date | 2005-12-13 | |
| dc.date | 2006-05-04 | |
| dc.date.accessioned | 2026-07-07T10:44:31Z | |
| dc.date.available | 2026-07-07T10:44:31Z | |
| dc.description | We study radiative corrections to $\bar{B} \to X_c \ell \barν_\ell$ decays assuming the power counting $m_c \sim \sqrt{Λ_QCD m_b}$ for the charm-quark mass. Concentrating on the shape-function region, we use effective field-theory methods to calculate the hadronic tensor at NLO accuracy. From this we deduce a shape-function independent relation between partially integrated $\bar{B} \to X_c\ell\barν_\ell$ and $\bar{B} \to X_u \ell \barν_\ell$ spectra to leading power in $1/m_b$, including first-order corrections in the strong coupling constant. This may provide an independent cross-check on the determination of the CKM element |V_{ub}|. | |
| dc.description | 22 pages, 8 figures, comparison with OPE in Sec.3 and references [26-28] added, section 5 (discussion/plots) reorganized, version to be published in JHEP | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0512157 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0512157 | |
| dc.identifier | JHEP0605:056,2006 | |
| dc.identifier | doi:10.1088/1126-6708/2006/05/056 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/182617 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Can $B -> X_c \ell ν$ help us extract |V_{ub}| ? | |
| dc.type | text |