## Abstract

The CP-violating asymmetry a

^{s}<inf>sl</inf> is studied using semileptonic decays of B^{0}<inf>s</inf> and B^{0}<inf>s</inf> mesons produced in pp collisions at a centre-of-mass energy of 7 TeV at the LHC, exploiting a data sample corresponding to an integrated luminosity of 1.0fb^{-1}. The reconstructed final states are D^{±}<inf>s</inf>μ^{∓}, with the D^{±}<inf>s</inf> particle decaying in the φπ^{±}mode. The D^{±}<inf>s</inf>μ^{∓}yields are summed over B̄^{0}<inf>s</inf> and B^{0}<inf>s</inf> initial states, and integrated with respect to decay time. Data-driven methods are used to measure efficiency ratios. We obtain a^{s}<inf>sl</inf>=(-0.06±0.50±0.36)%, where the first uncertainty is statistical and the second systematic. © 2013 The Authors.Original language | English |
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Pages (from-to) | 607-615 |

Journal | Physics Letters B |

Volume | 728 |

DOIs | |

Publication status | Published - 2014 |