Measurement of CP asymmetry in B0s → D ∓s K± decays
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Abstract
We report on measurements of the time-dependent CP violating observables in B 0s → D ∓s K ± decays using a dataset corresponding to 1.0 fb−1 of pp collisions recorded with the LHCb detector. We find the CP violating observables C f = 0.53±0.25±0.04, A ΔΓf = 0.37 ± 0.42 ± 0.20, AΔΓf¯=0.20±0.41±0.20, S f = −1.09±0.33±0.08, Sf¯=−0.36±0.34±0.08, where the uncertainties are statistical and systematic, respectively. Using these observables together with a recent measurement of the B 0s mixing phase −2β s leads to the first extraction of the CKM angle γ from B 0s → D ∓s K ± decays, finding γ = (115 + 28− 43)° modulo 180° at 68% CL, where the error contains both statistical and systematic uncertainties.
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Aaij, R., Adeva, B., Adinolfi, M. et al. Measurement of CP asymmetry in B0s → D∓s K± decays. J. High Energ. Phys. 2014, 60 (2014). https://doi.org/10.1007/JHEP11(2014)060
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© CERN, for the benefit of the LHCb Collaboration. Article funded by SCOAP3. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0), which permits use, duplication, adaptation, distribution, and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.