Study of CP violation in B0 → DK⋆(892)0 decays with D → Kπ(ππ), ππ(ππ), and KK final states

Abstract

A measurement of CP-violating observables associated with the interference of B0 → D0K⋆(892)0 and

B 0

→

D ¯

0

K ⋆

892

0

$$ {B}^0\to {\overline{D}}^0{K}^{\star }{(892)}^0 $$ decay amplitudes is performed in the D0 → K∓π±(π+π−), D0 → π+π−(π+π−), and D0 → K+K− final states using data collected by the LHCb experiment corresponding to an integrated luminosity of 9 fb−1. CP-violating observables related to the interference of

B s 0

→

D 0

K ¯

⋆

892

0

$$ {B}_s^0\to {D}^0{\overline{K}}^{\star }{(892)}^0 $$ and

B s 0

→

D ¯

0

K ¯

⋆

892

0

$$ {B}_s^0\to {\overline{D}}^0{\overline{K}}^{\star }{(892)}^0 $$ are also measured, but no evidence for interference is found. The B0 observables are used to constrain the parameter space of the CKM angle γ and the hadronic parameters

r

B 0

DK ⋆

$$ {r}_{B^0}^{DK\star } $$ and

δ

B 0

DK ⋆

$$ {\delta}_{B^0}^{DK\star } $$ with inputs from other measurements. In a combined analysis, these measurements allow for four solutions in the parameter space, only one of which is consistent with the world average.