First measurement of time-dependent CP violation in Bs -> K+K- decays

Abstract

Direct and mixing-induced CP-violating asymmetries in Bs -> K+K- decays are measured for the first time using a data sample of pp collisions, corresponding to an integrated luminosity of 1.0 fb^{-1}, collected with the LHCb detector at a centre-of-mass energy of 7 TeV. The results are C_{KK} = 0.14 \pm 0.11 \pm 0.03 and S_{KK} = 0.30 \pm 0.12 \pm 0.04, where the first uncertainties are statistical and the second systematic. The corresponding quantities are also determined for B0 -> pi+pi- decays to be C_{pipi} = -0.38 \pm 0.15 \pm 0.02 and S_{pipi} = -0.71 \pm 0.13 \pm 0.02, in good agreement with existing measurements.

22 pages, 8 figures, 4 tables, v2 with minor changes after journal review

References in corpus (10)

• PYTHIA 6.4 Physics and Manual
• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of summer 2016
• Precision measurement of the $B_s^0$-${\bar{B}}_s^0$ oscillation frequency with the decay $B^{0}_{s}\rightarrowD^{-}_{s}π^{+}$
• Measurement of CP Asymmetries and Branching Fractions in Charmless Two-Body B-Meson Decays to Pions and Kaons
• Opposite-side flavour tagging of B mesons at the LHCb experiment
• $B_{s,d}\to \pi \pi ,\pi K,KK$: Status and Prospects
• Measurement of the flavour-specific CP-violating asymmetry $a_{\mathrm{sl}}^s$ in $B_s^0$ decays
• Exploring B_{d,s}-> KK decays through flavour symmetries and QCD-factorisation
• Testing the Standard Model and searching for New Physics with $B_d\to \pi \pi$ and $B_s\to KK$ decays
• ANAIS: Status and prospects

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