Threshold resummed spectra in B -> Xu l nu decays in NLO (II)
| dc.creator | Aglietti, Ugo | |
| dc.creator | Ricciardi, Giulia | |
| dc.creator | Ferrera, Giancarlo | |
| dc.date | 2005-09-10 | |
| dc.date.accessioned | 2026-07-07T10:29:40Z | |
| dc.date.available | 2026-07-07T10:29:40Z | |
| dc.description | We resum to next-to-leading order the distribution in the ratio of the invariant hadron mass mX to the total hadron energy EX and the distribution in mX in the semileptonic decays B -> Xu l nu. By expanding our formulas, we obtain the coefficients of all the infrared logarithms at O(alphaS^2) and of the leading ones at O(alphaS^3). We explicitly show that the relation between these semileptonic spectra and the photon spectrum in the radiative decay B -> Xs gamma is not a purely short-distance one. There are long-distance effects in the semileptonic spectra which are not completely factorized by the structure function as measured in the radiative decay and have to be modelled in some way. | |
| dc.description | 16 pages, no figures | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0509095 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0509095 | |
| dc.identifier | Phys.Rev.D74:034005,2006 | |
| dc.identifier | doi:10.1103/PhysRevD.74.034005 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/177886 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Threshold resummed spectra in B -> Xu l nu decays in NLO (II) | |
| dc.type | text |