Constraints on the CKM angle alpha in the B --> rho rho decays
| dc.creator | Li, Haibo | |
| dc.date | 2004-10-29 | |
| dc.date.accessioned | 2026-07-07T12:59:09Z | |
| dc.date.available | 2026-07-07T12:59:09Z | |
| dc.description | Using a data sample of 122 million Upsilon(4S) -> BBbar decays collected with BaBar detector at the PEP-II asymmetric B factory at SLAC, we measure the time-dependent-asymmetry parameters of the longitudinally polarized component in the B0 -> rho^+ rho^- decay as C_L = -0.23 +/- 0.24 (stat) +/- 0.14 (syst) and S_L = -0.19 +/- 0.33 (stat) +/- 0.11 (syst). The B0 -> rho0 rho0 decay mode is also searched for in a data sample of about 227 million BBbar pairs. No significant signal is observed, and an upper limit of 1.1 * 10-6 (90% C.L.) on the branching fraction is set. The penguin contribution to the CKM angle $α$ uncertainty is measured to be 11 degree. All results are preliminary. | |
| dc.description | 3 pages, 1 postscript figues, submitted to DPF2004 | |
| dc.identifier | https://arxiv.org/abs/hep-ex/0410092 | |
| dc.identifier | http://arxiv.org/abs/hep-ex/0410092 | |
| dc.identifier | Int.J.Mod.Phys.A20:3578-3580,2005 | |
| dc.identifier | doi:10.1142/S0217751X05027011 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/225487 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | Constraints on the CKM angle alpha in the B --> rho rho decays | |
| dc.type | text |