Impact of Four-Quark Shape Functions on Inclusive B Decay Spectra
| dc.creator | Neubert, Matthias | |
| dc.date | 2004-11-01 | |
| dc.date | 2005-08-30 | |
| dc.date.accessioned | 2026-07-07T12:26:31Z | |
| dc.date.available | 2026-07-07T12:26:31Z | |
| dc.description | It has recently been pointed out that a new class of subleading shape functions involving B-meson matrix elements of non-local four-quark operators contributes at order Lambda_{QCD}/m_b to B->X_u+l+nu decay distributions in the endpoint region. The corresponding functions f_u(omega) and f_v(omega) are estimated using the vacuum-insertion approximation. A numerical analysis of various B->X_u+l+nu decay spectra suggests that these power corrections are very small, below present theoretical uncertainties due to other subleading shape-function contributions. | |
| dc.description | 8 pages, 2 figures; minor revisions and figure added; version to appear in Eur. Phys. J. C | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0411027 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0411027 | |
| dc.identifier | Eur.Phys.J.C44:205-209,2005 | |
| dc.identifier | doi:10.1140/epjc/s2005-02360-4 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/214901 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Impact of Four-Quark Shape Functions on Inclusive B Decay Spectra | |
| dc.type | text |