Branching Fractions and CP Asymmetries in B0 to pi0pi0, B+ to pi+pi0 and B+ to K+pi0 Decays and Isospin Analysis of the B to pi pi System
- SLAC
Based on a sample of 227 million B{bar B} pairs collected by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC, we measure the branching fraction {Beta}(B{sup 0} {yields} {pi}{sup 0}{pi}{sup 0}) = (1.17 {+-} 0.32 {+-} 0.10) x 10{sup -6}, and the asymmetry C{sub {pi}{sup 0}{pi}{sup 0}} = -0.12 {+-} 0.56 {+-} 0.06. The B{sup 0} {yields} {pi}{sup 0}{pi}{sup 0} signal has a significance of 5.0{sigma}. We also measure {Beta}(B{sup +} {yields} {pi}{sup +}{pi}{sup 0}) = (5.8 {+-} 0.6 {+-} 0.4) x 10{sup -6}, {Beta}(B{sup +} {yields} K{sup +}{pi}{sup 0}) = (12.0 {+-} 0.7 {+-} 0.6) x 10{sup -6}, and the charge asymmetries {Alpha}{sub {pi}{sup +}{pi}{sup 0}} = -0.01 {+-} 0.10 {+-} 0.02 and {Alpha}{sub K{sup +}{pi}{sup 0}} = 0.06 {+-} 0.06 {+-} 0.01. Using isospin relations we find an upper bound on the angle difference |{alpha} - {alpha}{sub eff}| of 35{sup o} at the 90% C.L.
- Research Organization:
- Stanford Linear Accelerator Center (SLAC), Menlo Park, CA
- Sponsoring Organization:
- SC
- DOE Contract Number:
- AC02-76SF00515
- OSTI ID:
- 839816
- Report Number(s):
- SLAC-PUB-10902
- Country of Publication:
- United States
- Language:
- English
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