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80752 |
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|a Williams, M.
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|a Massachusetts Institute of Technology. Department of Physics
|e contributor
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|a Williams, M.
|e contributor
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|a First Measurement of the CP-Violating Phase in B[0 over s]→ϕϕ Decays
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|b American Physical Society,
|c 2013-09-16T16:20:00Z.
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|z Get fulltext
|u http://hdl.handle.net/1721.1/80752
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|a A first flavor-tagged measurement of the time-dependent CP-violating asymmetry in B[0 over s]→ϕϕ decays is presented. In this decay channel, the CP-violating weak phase arises due to CP violation in the interference between B[0 over s]-B̅[0 over s] mixing and the b→ss̅ s gluonic penguin decay amplitude. Using a sample of pp collision data corresponding to an integrated luminosity of 1.0 fb[superscript -1] and collected at a center-of-mass energy of 7 TeV with the LHCb detector, 880 B[0 over s]→ϕϕ signal decays are obtained. The CP-violating phase is measured to be in the interval [-2.46,-0.76] rad at a 68% confidence level. The p value of the standard model prediction is 16%.
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|a National Science Foundation (U.S.)
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|a en_US
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|a Article
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|t Physical Review Letters
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