Updated Measurement of the CKM Angle alpha Using B0->rho+rho- Decays
| dc.creator | The BABAR Collaboration | |
| dc.creator | Aubert, B. | |
| dc.date | 2006-07-28 | |
| dc.date | 2006-08-02 | |
| dc.date.accessioned | 2026-07-07T07:16:38Z | |
| dc.date.available | 2026-07-07T07:16:38Z | |
| dc.description | We present results from an analysis of B0->rho+rho- using 316fb^-1 of Y(4S) -> B0B0bar decays observed with the BaBar detector at the PEP-II asymmetric-energy B Factory at SLAC. We measure the B0->rho+rho- branching fraction, longitudinal polarization fraction fL, and the CP-violating parameters S_LONG and C_LONG: B(B0->rho+rho-) = (23.5 +/- 2.2 [stat] +/- 4.1 [syst]) * 10^-6, fL = 0.977 +/- 0.024 [stat] +0.015/-0.013 [syst] S_LONG = -0.19 +/- 0.21 [stat] +0.05/-0.07 [syst] C_LONG = -0.07 +/- 0.15 [stat] +/- 0.06 [syst] Using an isospin analysis of B->rhorho decays we determine the angle alpha of the unitarity triangle. One of the two solutions, alpha = [74, 117] degrees at 68% CL, is compatible with the standard model. All results presented here are preliminary. | |
| dc.identifier | https://arxiv.org/abs/hep-ex/0607098 | |
| dc.identifier | http://arxiv.org/abs/hep-ex/0607098 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/113658 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | Updated Measurement of the CKM Angle alpha Using B0->rho+rho- Decays | |
| dc.type | text |