MEASUREMENTS OF BRANCHING FRACTIONS AND DIRECT CP ASYMMETRIES IN PI+ PI0, K+ PI0 AND K0 PI0 B DECAYS
The authors present preliminary results of the analyses of B{sup +} {yields} h{sup +} {pi}{sup 0} (with H{sup +} = {pi}{sup +}, K{sup +}) and B{sup 0} {yields} K{sup 0}{pi}{sup 0} decays from a sample of approximately 88 million b{bar B} pairs collected by the BaBar detector at the PEP-II asymmetric-energy B Factory at SLAC. They measure the {pi}{sup +}{pi}{sup 0} branching fraction and they obtain {Beta}(B{sup +} {yields} {pi}{sup +} {pi}{sup 0}) = (5.5{sub -0.9}{sup +1.0} {+-} 0.6) x 10{sup -6} with a significance of 7.7{sigma} including systematic uncertainties. The measure the K{sup +} {pi}{sup 0} and K{sup 0} {pi}{sup 0} branching fractions to be {Beta}(B{sup +} {yields} K{sup +} {pi}{sup 0}) = (12.8{sub -1.1}{sup +1.2} {+-} 1.0) x 10{sup -6} and {Beta}(B{sup 0} {yields} K{sup 0}{pi}{sup 0}) = (10.4 {+-} 1.5 {+-} 0.8) x 10{sup -6}. At the same time, the direct CP-violating asymmetries are investigated and they find {Alpha}{sub {pi}{sup +}{pi}{sup 0}} = -0.03{sub -0.17}{sup +0.18} {+-} 0.02, {Alpha}{sub K{sup +}{pi}{sup 0}} = -0.09 {+-} 0.09 {+-} 0.01and {Alpha}{sub K{sup 0}{pi}{sup 0}} = 0.03 {+-} 0.36 {+-} 0.09, where the errors are statistical and systematic, respectively.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC03-76SF00515
- OSTI ID:
- 799955
- Report Number(s):
- SLAC-PUB-9304; TRN: US200308%%365
- Resource Relation:
- Other Information: PBD: 25 Jul 2002
- Country of Publication:
- United States
- Language:
- English
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