Time-Dependent Analysis of the Decay B0 --> rho0 rho0
| dc.creator | The BABAR Collaboration | |
| dc.creator | Aubert, B. | |
| dc.date | 2007-08-12 | |
| dc.date | 2007-08-22 | |
| dc.date.accessioned | 2026-07-07T08:24:36Z | |
| dc.date.available | 2026-07-07T08:24:36Z | |
| dc.description | We study the decay B0 --> rho0 rho0 in a sample of about 427 million Upsilon(4S) --> BBbar decays collected with the BABAR detector at the PEP-II asymmetric-energy e+e- collider at SLAC. We find the branching fraction B = (0.84 +/- 0.29 +/- 0.17)*1e-6 and longitudinal polarization fraction of f_L = 0.70 +/- 0.14 +/- 0.05, where the first uncertainty is statistical, and the second is systematic. The evidence for the B0 --> rho0 rho0 signal has 3.6 sigma significance. We investigate the proper-time dependence of the longitudinal component in the decay and measure the CP-violating coefficients S^{00}_L = 0.5 +/- 0.9 +/- 0.2 and C^{00}_L = 0.4 +/- 0.9 +/- 0.2, corresponding to the sine and cosine terms in the time evolution of asymmetry. We study the implication of these results for penguin contributions in B --> rho rho decays and for the CKM unitarity angle alpha. | |
| dc.description | 20 pages, 18 postscript figures, submitted to LP2007. Second version corrects submission date | |
| dc.identifier | https://arxiv.org/abs/0708.1630 | |
| dc.identifier | http://arxiv.org/abs/0708.1630 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/136394 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | Time-Dependent Analysis of the Decay B0 --> rho0 rho0 | |
| dc.type | text |