Branching fractions and CP-violating asymmetries in radiative B decays to eta K gamma

Branching fractions and CP-violating asymmetries in radiative B decays to eta K gamma

We present measurements of the CP-violation parameters S and C for the radiative decay B0-->etaKS0gamma; for B-->etaKgamma we also measure the branching fractions and for B+-->etaK+gamma the time-integrated charge asymmetry Ach. The data, collected with the BABAR detector at the Stanford...

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Bibliographic Details
Main Authors: Zhao, M., Yamamoto, R. K., Taylor, Frank E., Spitznagel, M., Sciolla, Gabriella, Dujmic, Denis, Cowan, Ray Franklin, Koeneke, Karsten, Fisher, Peter H.
Other Authors: Massachusetts Institute of Technology. Department of Physics
Format: Article
Language:en_US
Published: American Physical Society 2010
Online Access:http://hdl.handle.net/1721.1/55356
https://orcid.org/0000-0002-7586-7253
https://orcid.org/0000-0002-8667-5660
Description
Summary:We present measurements of the CP-violation parameters S and C for the radiative decay B0-->etaKS0gamma; for B-->etaKgamma we also measure the branching fractions and for B+-->etaK+gamma the time-integrated charge asymmetry Ach. The data, collected with the BABAR detector at the Stanford Linear Accelerator Center, represent 465×106 BB[over-bar] pairs produced in e+e- annihilation. The results are S=-0.18[subscript -0.46][superscript +0.49]±0.12, C=-0.32[superscript -0.39][superscript +0.40]±0.07, B(B0-->etaK0gamma)=(7.1[subscript -2.0][superscript +2.1]±0.4)×10[superscript -6], B(B+-->etaK+gamma)=(7.7±1.0±0.4)×10[superscript -6], and A[subscript ch]=(-9.0[subscript -9.8][superscript +10.4]±1.4)×10[superscript -2]. The first error quoted is statistical and the second systematic.

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