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Evidence for Bs0→ϕϕ Decay and Measurements of Branching Ratio and ACP for B+→ ϕK+

CollaborationWith : Campanelli, Mario / Clark, Allan Geoffrey / Donega, Mauro / D'Onofrio, Monica / Lister, Alison / Liu, Yanwen / Wu, Xin
Published in Physical Review Letters. 2005, vol. 95, no. 03, p. 031801
Abstract We present the first evidence of charmless decays of the B0s meson, the decay B0s→ϕϕ, and a measurement of the branching ratio BR(B0s→ϕϕ) using 180  pb−1 of data collected by the CDF II experiment at the Fermilab Tevatron collider. In addition, the BR and direct CP asymmetry for the B+→ϕK+ decay are measured. We obtain BR(B0s→ϕϕ)=[14+6−5(stat)±6(syst)]×10−6, BR(B+→ϕK+)=[7.6±1.3(stat)±0.6(syst)]×10−6, and ACP(B+→ϕK+)=−0.07±0.17(stat)+0.03−0.02(syst). Both decays are governed in the standard model by second order (penguin) b→ss¯s amplitudes.
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CDF COLLABORATION. Evidence for Bs0→ϕϕ Decay and Measurements of Branching Ratio and ACP for B+→ ϕK+. In: Physical Review Letters, 2005, vol. 95, n° 03, p. 031801. https://archive-ouverte.unige.ch/unige:38102

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Deposited on : 2014-06-24

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