Measurement of CP observables in B± → D(*)K± and B± → D(*)π± decays using two-body D final states

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Measurements of CP observables in B± → D(*)K± and B± → D(*)π± decays are presented, where D(∗) indicates a neutral D or D∗ meson that is an admixture of meson and anti-meson states. Decays of the D(∗) meson to the 0 and  final states are partially reconstructed without inclusion of the neutral pion or photon. Decays of the D meson are reconstructed in the K±π∓, K+K, and π+π final states. The analysis uses a sample of charged B mesons produced in proton-proton collisions and collected with the LHCb experiment, corresponding to integrated luminosities of 2.0, 1.0, and 5.7 fb1 taken at centre-of-mass energies of 7, 8, and 13 TeV, respectively. The measurements of partially reconstructed B± → D(*)K± and B± → D(∗)π± with D → Kπ± decays are the first of their kind, and a first observation of the B± → (Dπ0)D∗π±(Dπ0)D∗π± decay is made with a significance of 6.1 standard deviations. All CP observables are measured with world-best precision, and in combination with other LHCb results will provide strong constraints on the CKM angle γ.

Originele taal-2English
Aantal pagina's36
TijdschriftJournal of High Energy Physics
Nummer van het tijdschrift4
StatusPublished - 9-apr-2021

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