Measurement of the CKM angle γ in B± → DK*(892)± decays

Abstract

Abstract Measurements of CP observables and the CKM angle γ are performed in B

± → DK *(892) ± decays, where D represents a superposition of D 0 and

$$ {\overline{D}}^0 $$

D ¯

0

states, using the LHCb dataset collected during Run 1 (2011–2012) and Run 2 (2015–2018). A study of this channel is presented with the D meson reconstructed in two-body final states K

±

π ∓, K + K

− and π + π

− ; four-body final states K

±

π ∓ π

±

π ∓ and π + π

−

π + π

− ; and three-body final states

$$ {K}_{\textrm{S}}^0{\pi}^{+}{\pi}^{-} $$

K S 0

π +

π −

and

$$ {K}_{\textrm{S}}^0{K}^{+}{K}^{-} $$

K S 0

K +

K −

. This analysis includes the first observation of the suppressed B

±

→ [π

±

K ∓] D

K *± and B

±

→ [π

±

K ∓ π

±

π ∓] D

K *± decays. The combined result gives γ = (63 ± 13)°.