Left-right mixing on leptonic and semileptonic $b\to u$ decays
| dc.creator | Chen, Chuan-Hung | |
| dc.creator | Nam, Soo-hyeon | |
| dc.date | 2008-07-06 | |
| dc.date.accessioned | 2026-07-07T11:52:19Z | |
| dc.date.available | 2026-07-07T11:52:19Z | |
| dc.description | It has been known that there exists a disagreement emerged between the determination of $|V_{ub}|$ from inclusive $B \to X_u\ellν$ decays and exclusive $B \to π\ellν$ decays. In order to solve the mismatch, we investigate the left-right (LR) mixing effects, denoted by $ξ_u$, in leptonic and semileptonic $b \to u$ decays. We find that the new interactions $(V+A)\times (V-A)$ induced via the LR mixing can explain the mismatch between the values of $|V_{ub}|$ if Re$(ξ_{u})=-(0.14 \pm 0.12)$. Furthermore, we also find that the LR mixing effects can enhance the branching fractions for $B \to τν$ and $B \to ρ\ellν$ decays by 30% and 17%, respectively, while reducing the branching fraction for $B \to γ\ellν$ decays by 18%. | |
| dc.description | 11 pages, 6 eps figures | |
| dc.identifier | https://arxiv.org/abs/0807.0896 | |
| dc.identifier | http://arxiv.org/abs/0807.0896 | |
| dc.identifier | Phys.Lett.B666:462-466,2008 | |
| dc.identifier | doi:10.1016/j.physletb.2008.07.095 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/204192 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Left-right mixing on leptonic and semileptonic $b\to u$ decays | |
| dc.type | text |