Measurements of Time-Dependent CP Violation in Radiative B Decays at BaBar
The authors present measurements of the CP-violation parameters S and C for the radiative decays B{sup 0} {yields} {pi}{sup 0}K{sub S}{sup 0}{gamma} and B{sup 0} {yields} {eta}K{sub S}{sup 0}{gamma}; for B {yields} {eta}K{gamma} they also measure the branching fractions and for B{sup +} {yields} {eta}K{sup +}{gamma} the time-integrated charge asymmetry A{sub ch}. The data, collected with the BABAR detector at the SLAC National Accelerator Laboratory, represent 467 x 10{sup 6} B{bar B} pairs produced in e{sup +}e{sup -} annihilation at the PEP-II collider. In this summary they present an updated measurement of the time-dependent CP asymmetry in B{sup 0} {yields} {pi}{sup 0}K{sub S}{sup 0}{gamma} decay mode and the first measurement of the time-dependent CP asymmetry in B{sup 0} {yields} {eta}K{sub S}{sup 0}{gamma} decay mode. Hadronic corrections in B{sup 0} {yields} {pi}{sup 0}K{sub S}{sup 0}{gamma} decay mode might permit S to be as large as {+-} 0.1. Such corrections and NP effects could depend on m({pi}{sup 0}K{sub S}{sup 0}), so they split the data into two parts: the K*(892) region with 0.8 < m({pi}{sup 0}K{sub S}{sup 0}) < 1.0 GeV/c{sup 2} and the non-K*(892) region with 1.1 < m({pi}{sup 0}K{sub S}{sup 0}) < 1.8 GeV/c{sup 2}. They also report updated measurements of branching fractions for the decay modes B{sup 0} {yields} {eta}K{sup 0}{gamma} and B{sup +} {yields} {eta}K{sup +}{gamma} and time-integrated charge-asymmetry for B{sup +} {yields} {eta}K{sup +}{gamma}.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-76SF00515
- OSTI ID:
- 969259
- Report Number(s):
- SLAC-PUB-13805; TRN: US1000228
- Resource Relation:
- Conference: Presented at 17th International Conference on Supersymmetry and the Unification of Fundamental Interactions (SUSY 09), Boston, Massachusetts, 5-10 Jun 2009
- Country of Publication:
- United States
- Language:
- English
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