Measurement of CP Asymmetries and Branching Fractions in B -> pi pi and B -> K pi decays
| dc.creator | The BABAR Collaboration | |
| dc.creator | Aubert, B. | |
| dc.date | 2006-07-29 | |
| dc.date | 2006-08-26 | |
| dc.date.accessioned | 2026-07-07T07:16:39Z | |
| dc.date.available | 2026-07-07T07:16:39Z | |
| dc.description | We present preliminary measurements of the CP asymmetries and branching fractions for B -> pi pi and B -> K pi decays. A total of 347 million BBbar events collected by the BABAR detector at the PEP-II asymmetric-energy e+e- collider at SLAC are used for these results. We find Spipi = -0.53 +- 0.14 +-0.02, Cpipi = -0.16 +- 0.11 +- 0.03, AKpi = -0.108 +- 0.024 +- 0.008, BF(B0 -> pi0 pi0) = (1.48 +- 0.26 +- 0.12) x 10^-6, BF(B+ -> pi+pi0) = (5.12 +- 0.47 +- 0.29) x 10^-6, BF(B+ -> K+pi0) = (13.3 +- 0.56 +- 0.64) x 10^-6, Cpi0pi0 = -0.33 +- 0.36 +- 0.08, Apipi0 = -0.019 +- 0.088 +- 0.014, AKpi0 = 0.016 +- 0.041 +- 0.012. The measured values of Spipi and Cpipi imply that CP conservation in B0 -> pi+ pi- decays is excluded at the 3.6 sigma level. From these results we present bounds on the CKM angle alpha. | |
| dc.description | 24 pages, 27 postscript figues, submitted to ICHEP 2006; v2: updated references | |
| dc.identifier | https://arxiv.org/abs/hep-ex/0607106 | |
| dc.identifier | http://arxiv.org/abs/hep-ex/0607106 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/113665 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | Measurement of CP Asymmetries and Branching Fractions in B -> pi pi and B -> K pi decays | |
| dc.type | text |