Branching fractions and CP-violating asymmetries in radiative B decays to eta K gamma
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Aubert-2009-Branching fractions.pdf
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Author(s)
Zhao, M.
Yamamoto, R. K.
Taylor, Frank E.
Spitznagel, M.
Sciolla, Gabriella
Dujmic, Denis
Cowan, Ray Franklin
Koeneke, Karsten
Fisher, Peter H.
Alternative Title
Branching fractions and CP-violating asymmetries in radiative B decays to ηKγ
Date Issued
January 2009
Journal
Physical Review D
Publisher
American Physical Society
Citation
BABAR Collaboration et al. “Branching fractions and CP-violating asymmetries in radiative B decays to eta K gamma.” Physical Review D 79.1 (2009): 011102. © 2009 The American Physical Society.
Version
Final published version
Abstract
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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
http://dx.doi.org/10.1103/PhysRevD.79.011102
