NNLO corrections to inclusive semileptonic B decays in the shape-function region
| dc.creator | Bell, Guido | |
| dc.date | 2008-10-31 | |
| dc.date | 2009-02-23 | |
| dc.date.accessioned | 2026-07-07T12:44:50Z | |
| dc.date.available | 2026-07-07T12:44:50Z | |
| dc.description | We compute 2-loop QCD corrections to the hard coefficient functions which arise in the factorization formula for B -> X_u l nu decays in the shape-function region. Our calculation provides the last missing piece required for a NNLO analysis of inclusive semileptonic B decays, which may significantly reduce the theoretical uncertainty in the extraction of the CKM matrix element |V_ub|. Among the technical aspects, we find that the 2-loop hard coefficient functions are free of infrared singularities as predicted by the factorization framework. We perform a brief numerical analysis of the NNLO corrections and include a discussion on charm mass effects. | |
| dc.description | 29 pages, 6 figures. v2: minor changes, matches published version | |
| dc.identifier | https://arxiv.org/abs/0810.5695 | |
| dc.identifier | http://arxiv.org/abs/0810.5695 | |
| dc.identifier | Nucl.Phys.B812:264-289,2009 | |
| dc.identifier | doi:10.1016/j.nuclphysb.2008.12.018 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/220910 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | NNLO corrections to inclusive semileptonic B decays in the shape-function region | |
| dc.type | text |