Study of CP-violating Asymmetries in B --> pi{sup +}/-pi{sup -}/+, K{sup +}/-pi{sup -}/+ Decays
- SLAC
We present a preliminary measurement of the time-dependent CP-violating asymmetry parameters S and C in neutral B decays to the {pi}{sup +-}{pi} CP eigenstate, and an updated preliminary measurement of the charge asymmetry in B {yields} K{sup {+-}}{pi} decays. Event yields and CP-violation parameters are determined simultaneously from a multidimensional unbinned maximum likelihood fit. In a data sample consisting of approximately 33 million {Upsilon}(4S) {yields} B{bar B} decays collected with the BABAR detector at the SLAC PEP-II asymmetric B Factory, we find 65{sub -11}{sup +12} {pi}{sup +-}{pi} and 217 {+-} 18 K{sup {+-}}{pi} candidates and measure S = 0.03{sub -0}{sup +0} {+-} 0.11, C = -0.25{sub -0}{sup +0} = -0.25{sub -0}{sup +0} {+-} 0.14, and = -0.07 {+-} 0.08 {+-} 0.02, where the first error is statistical and the second is systematic.
- Research Organization:
- Stanford Linear Accelerator Center, Menlo Park, CA (US)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC03-76SF00515
- OSTI ID:
- 787204
- Report Number(s):
- SLAC-PUB-8929
- Country of Publication:
- United States
- Language:
- English
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