Measurement of the flavour-specific CP-violating asymmetry assl in B0s decays

LHCb Collaboration; et al; Bernet, R; Müller, K; Steinkamp, O; Straumann, U; Vollhardt, A (2014). Measurement of the flavour-specific CP-violating asymmetry assl in B0s decays. Physics Letters B, 728:607-615.

Abstract

The CP-violating asymmetry View the MathML sourceasls is studied using semileptonic decays of View the MathML sourceBs0 and View the MathML sourceB¯s0 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−11.0 fb−1. The reconstructed final states are View the MathML sourceDs±μ∓, with the View the MathML sourceDs± particle decaying in the ϕπ±ϕπ± mode. The View the MathML sourceDs±μ∓ yields are summed over View the MathML sourceB¯s0 and View the MathML sourceBs0 initial states, and integrated with respect to decay time. Data-driven methods are used to measure efficiency ratios. We obtain View the MathML sourceasls=(−0.06±0.50±0.36)%, where the first uncertainty is statistical and the second systematic.

Abstract

The CP-violating asymmetry View the MathML sourceasls is studied using semileptonic decays of View the MathML sourceBs0 and View the MathML sourceB¯s0 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−11.0 fb−1. The reconstructed final states are View the MathML sourceDs±μ∓, with the View the MathML sourceDs± particle decaying in the ϕπ±ϕπ± mode. The View the MathML sourceDs±μ∓ yields are summed over View the MathML sourceB¯s0 and View the MathML sourceBs0 initial states, and integrated with respect to decay time. Data-driven methods are used to measure efficiency ratios. We obtain View the MathML sourceasls=(−0.06±0.50±0.36)%, where the first uncertainty is statistical and the second systematic.

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Item Type: Journal Article, refereed, original work 07 Faculty of Science > Physics Institute 530 Physics English 2014 06 Feb 2014 09:36 15 Feb 2018 12:52 Elsevier 0370-2693 Gold https://doi.org/10.1016/j.physletb.2013.12.030