Measurement of the CP-Violating Asymmetry Amplitude sin2beta
| dc.creator | Aubert, B. | |
| dc.date | 2002-07-17 | |
| dc.date | 2002-10-02 | |
| dc.date.accessioned | 2026-07-07T12:01:48Z | |
| dc.date.available | 2026-07-07T12:01:48Z | |
| dc.description | We present results on time-dependent CP-violating asymmetries in neutral B decays to several CP eigenstates. The measurements use a data sample of about 88 million Y(4S) --> B Bbar decays collected between 1999 and 2002 with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. We study events in which one neutral B meson is fully reconstructed in a final state containing a charmonium meson and the other B meson is determined to be either a B0 or B0bar from its decay products. The amplitude of the CP-violating asymmetry, which in the Standard Model is proportional to sin2beta, is derived from the decay-time distributions in such events. We measure sin2beta = 0.741 +/- 0.067 (stat) +/- 0.034 (syst) and |lambda| = 0.948 +/- 0.051 (stat) +/- 0.030 (syst). The magnitude of lambda is consistent with unity, in agreement with the Standard Model expectation of no direct CP violation in these modes. | |
| dc.description | 7 pages, 2 postscript figures, submitted to PRL | |
| dc.identifier | https://arxiv.org/abs/hep-ex/0207042 | |
| dc.identifier | http://arxiv.org/abs/hep-ex/0207042 | |
| dc.identifier | Phys.Rev.Lett.89:201802,2002 | |
| dc.identifier | doi:10.1103/PhysRevLett.89.201802 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/207221 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | Measurement of the CP-Violating Asymmetry Amplitude sin2beta | |
| dc.type | text |