Measurement of CP observables in B0 -> D K*0 with D -> K+ K-

Abstract

The decay B0 -> D K*0 and the charge conjugate mode are studied using 1.0fb-1 of pp collision data collected by the LHCb experiment at sqrt(s) = 7TeV in 2011. The CP asymmetry between the B0 -> D K*0 and the B0bar -> D K*0bar decay rates, with the neutral D meson in the CP-even final state K+K-, is found to be A_d_KK = -0.45 +- 0.23 +- 0.02, where the first uncertainty is statistical and the second is systematic. In addition, favoured B0 -> D K*0 decays are reconstructed with the D meson in the non-CP eigenstate K+ pi-. The ratio of the B-flavour averaged decay rates in D decays to CP and non-CP eigenstates is measured to be R_d_KK = 1.36 (+0.37) (-0.32) +- 0.07, where the ratio of the branching fractions of D0 -> K- pi+ to D0 -> K+ K- decays is included as multiplicative factor. The CP asymmetries measured with two control channels, the favoured B0 -> DK*0 decay with D -> K+ pi- and the Bs0bar -> D K*0 decay with D K+ K-, are also reported.

10 pages, 2 figures

References in corpus (4)

• PYTHIA 6.4 Physics and Manual
• The LHCb Trigger and its Performance in 2011
• A model-independent Dalitz plot analysis of $B^{\pm }\to D{K}^{\pm }$ with $D\to K_{\mathrm{S}}^0{h}^{+}{h}^{-}$ ($h=\pi ,K$) decays and constraints on the CKM angle $\gamma$
• Observation of the decay B0 -> D0bar K+ K- and evidence for Bs -> D0bar K+ K-

Cited by in corpus (12)

• Massive Gravity
• Dalitz plot analysis of $B_s^0\to {\bar{D}}^0{K}^{-}{\pi }^{+}$ decays
• Cosmology with non-minimal derivative couplings: perturbation analysis and observational constraints
• Measurement of CP violation parameters in B0->D K*0 decays
• Non-minimal derivative couplings of the composite metric
• Observation of the suppressed ADS modes $B^{\pm }\to [{\pi }^{\pm }{K}^{\mp }{\pi }^{+}{\pi }^{-}{]}_D{K}^{\pm }$ and $B^{\pm }\to [{\pi }^{\pm }{K}^{\mp }{\pi }^{+}{\pi }^{-}{]}_D{\pi }^{\pm }$
• A study of CP violation in $B^{\pm }\to D{K}^{\pm }$ and $B^{\pm }\to D{\pi }^{\pm }$ decays with $D\to K_{\mathrm{S}}^0{K}^{\pm }{\pi }^{\mp }$ final states
• Measurement of the branching fractions of the decays Bs -> D0bar K- π+ and B0 -> D0bar K+ π-
• On Partially Massless Theory in 3 Dimensions
• Shift in weak phase $\gamma$ due to CP asymmetries in $D$ decays to two pseudoscalar mesons
• Heavy Flavour Physics at the LHC
• Measurements of the CKM angle gamma in tree-dominated decays at LHCb