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Regular version of the site

Article

Measurement of CP observables in the process B0 → DK*0 with two- and four-body D decays

Journal of High Energy Physics. 2019. No. 08(2019)041. P. 1-29.
A. Boldyrev, D. Derkach, M. Hushchyn, N. Kazeev, A. Maevskiy, F. Ratnikov, A. Ustyuzhanin, V. Belavin, M. Borisyak, K. Arzymatov.

Measurements of CP observables in B0 → DK∗0 decays are presented, where D represents a superposition of D0 and 𝐷⎯⎯⎯⎯⎯0D¯0 states. The D meson is reconstructed in the two-body final states K+π−, π+K−, K+K− and π+π−, and, for the first time, in the fourbody final states K+ππ+π−, π+Kπ+π− and π+π−π+π−. The analysis uses a sample of neutral B mesons produced in proton-proton collisions, corresponding to an integrated luminosity of 1.0, 2.0 and 1.8 fb−1 collected with the LHCb detector at centre-of-mass energies of 𝑠√=7,8s=7,8 and 13 TeV, respectively. First observations of the decays B0 → D(π+K−)K∗0 and B0 → D(π+ππ+π−)K∗0 are obtained. The measured observables are interpreted in terms of the CP -violating weak phase γ.