TY - JOUR
T1 - Measurement of CP observables in $B^0 \to D K^*0$ with $D \to K^+ K^-$
AU - Aaij, R.
AU - van den Brand, J.F.J.
AU - Dettori, F.
AU - Ketel, T.J.
AU - Koopman, R.
AU - Lambert, R.W.
AU - Martinez-Santos, D.
AU - Merk, M.H.M.
AU - Raven, H.G.
AU - Schiller, M.
AU - Syropoulos, V.
AU - Tolk, S.
AU - LHCb, Collaboration
N1 - Aaij:2012fd
PY - 2013
Y1 - 2013
N2 - The decay B0 → DK*0 and the charge conjugate mode are studied using 1.0 fb−1 of pp collision data collected by the LHCb experiment at √s = 7 TeV in 2011. The CP asymmetry between the B0 → DK*0 and the B0 → DK*0 decay rates, with the neutral D meson in the CP-even final state K+K−‚ is found to be AdKK = −0.45 ± 0.23 ± 0.02, where the first uncertainty is statistical and the second is systematic. In addition, favoured B0 → DK*0 decays are reconstructed with the D meson in the non-CP eigenstate K+π−. The ratio of the B-flavour averaged decay rates in D decays to CP and non-CP eigenstates is measured to be RdKK = 1.36 +0.37−0.32 ± 0.07, where the ratio of the branching fractions of D0 → K−π+ 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+π− and the B0s → DK*0 decay with D → K+K−, are also reported.
AB - The decay B0 → DK*0 and the charge conjugate mode are studied using 1.0 fb−1 of pp collision data collected by the LHCb experiment at √s = 7 TeV in 2011. The CP asymmetry between the B0 → DK*0 and the B0 → DK*0 decay rates, with the neutral D meson in the CP-even final state K+K−‚ is found to be AdKK = −0.45 ± 0.23 ± 0.02, where the first uncertainty is statistical and the second is systematic. In addition, favoured B0 → DK*0 decays are reconstructed with the D meson in the non-CP eigenstate K+π−. The ratio of the B-flavour averaged decay rates in D decays to CP and non-CP eigenstates is measured to be RdKK = 1.36 +0.37−0.32 ± 0.07, where the ratio of the branching fractions of D0 → K−π+ 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+π− and the B0s → DK*0 decay with D → K+K−, are also reported.
U2 - 10.1007/JHEP03(2013)067
DO - 10.1007/JHEP03(2013)067
M3 - Article
VL - 2013
JO - Journal of High Energy Physics
JF - Journal of High Energy Physics
SN - 1126-6708
IS - 3
ER -