|V_ub| from UTangles and B->pi l nu
| dc.creator | Ball, Patricia | |
| dc.date | 2006-11-08 | |
| dc.date.accessioned | 2026-07-07T11:02:10Z | |
| dc.date.available | 2026-07-07T11:02:10Z | |
| dc.description | The angles of the CKM unitarity triangle are now known well enough to allow a determination of its sides from global fits, with good accuracy. Assuming that new physics does not affect the angles, UTfit and CKMfitter find $|V_{ub}| = (3.50\pm 0.18)\times 10^{-3}$. Using this result, and new high-precision data on the spectrum of $B\toπ\ellν$ decays from BaBar, we find $|V_{ub}| f_+(0) = (9.1\pm 0.7)\times 10^{-4}$ and $f_+(0) = 0.26\pm 0.02$, with $f_+$ the $B\toπ$ weak transition form factor. These results are {\em completely model-independent}. We compare them to theoretical calculations from lattice and QCD sum rules on the light-cone. | |
| dc.description | 13 pages, 3 figures | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0611108 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0611108 | |
| dc.identifier | Phys.Lett.B644:38-44,2007 | |
| dc.identifier | doi:10.1016/j.physletb.2006.11.034 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/188167 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | |V_ub| from UTangles and B->pi l nu | |
| dc.type | text |