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Measurement of Polarization and Search for CP Violation in Bs0 -> ϕϕ Decays

CollaborationWith : Clark, Allan Geoffrey / Garcia Navarro, Jose Enrique / Lister, Alison / Wu, Xin
Published in Physical Review Letters. 2011, vol. 107, no. 26, p. 261802
Abstract We present the first measurement of polarization and CP-violating asymmetries in a B0s decay into two light vector mesons, B0s→ϕϕ, and an improved determination of its branching ratio using 295 decays reconstructed in a data sample corresponding to 2.9  fb−1 of integrated luminosity collected by the CDF experiment at the Fermilab Tevatron collider. The fraction of longitudinal polarization is determined to be fL=0.348±0.041(stat)±0.021(syst), and the branching ratio B(B0s→ϕϕ)=[2.32±0.18(stat)±0.82(syst)]×10−5. Asymmetries of decay angle distributions sensitive to CP violation are measured to be Au=−0.007±0.064(stat)±0.018(syst) and Av=−0.120±0.064(stat)±0.016(syst).
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CDF COLLABORATION. Measurement of Polarization and Search for CP Violation in Bs0 -> ϕϕ Decays. In: Physical Review Letters, 2011, vol. 107, n° 26, p. 261802. doi: 10.1103/PhysRevLett.107.261802 https://archive-ouverte.unige.ch/unige:38750

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Deposited on : 2014-07-21

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