[HTML][HTML] Measurement of the flavour-specific CP-violating asymmetry asls in Bs0 decays
R Aaij, B Adeva, M Adinolfi, C Adrover, A Affolder… - Physics Letters B, 2014 - Elsevier
R Aaij, B Adeva, M Adinolfi, C Adrover, A Affolder, Z Ajaltouni, J Albrecht, F Alessio…
Physics Letters B, 2014•ElsevierThe CP-violating asymmetry a sl s is studied using semileptonic decays of B s 0 and B¯ s 0
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 1.0 fb− 1. The reconstructed final
states are D s±μ∓, with the D s±particle decaying in the ϕ π±mode. The D s±μ∓ yields are
summed over B¯ s 0 and B s 0 initial states, and integrated with respect to decay time. Data-
driven methods are used to measure efficiency ratios. We obtain a sl s …
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 1.0 fb− 1. The reconstructed final
states are D s±μ∓, with the D s±particle decaying in the ϕ π±mode. The D s±μ∓ yields are
summed over B¯ s 0 and B s 0 initial states, and integrated with respect to decay time. Data-
driven methods are used to measure efficiency ratios. We obtain a sl s …
The CP-violating asymmetry a sl s is studied using semileptonic decays of B s 0 and B¯ s 0 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 1.0 fb− 1. The reconstructed final states are D s±μ∓, with the D s±particle decaying in the ϕ π±mode. The D s±μ∓ yields are summed over B¯ s 0 and B s 0 initial states, and integrated with respect to decay time. Data-driven methods are used to measure efficiency ratios. We obtain a sl s=(− 0.06±0.50±0.36)%, where the first uncertainty is statistical and the second systematic.
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