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



Aaij, R, Beteta, C Abellan, Ackernley, T, Adeva, B, Adinolfi, M, Afsharnia, H, Aidala, CA, Aiola, S, Ajaltouni, Z, Akar, S
et al (show 949 more authors) (2021) Measurement of CP observables in B<SUP>±</SUP> → D<SUP>(</SUP>*<SUP>)</SUP>K<SUP>±</SUP> and B<SUP>±</SUP> → D<SUP>(</SUP>*<SUP>)</SUP>π<SUP>±</SUP> decays using two-body D final states. JOURNAL OF HIGH ENERGY PHYSICS, 2021 (4). 81-.

Access the full-text of this item by clicking on the Open Access link.

Abstract

Measurements of $C\!P$ observables in $B^\pm \rightarrow D^{(*)} K^\pm$ and $B^\pm \rightarrow D^{(*)} \pi^\pm$ 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 $D\pi^0$ and $D\gamma$ final states are partially reconstructed without inclusion of the neutral pion or photon. Decays of the $D$ meson are reconstructed in the $K^\pm \pi^\mp$, $K^+K^-$, and $\pi^+\pi^-$ 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 fb$^{-1}$ taken at centre-of-mass energies of 7, 8, and 13 TeV, respectively. The measurements of partially reconstructed $B^\pm \to D^* K^\pm$ and $B^\pm \to D^* \pi^\pm$ with $D \to K^\mp \pi^\pm$ decays are the first of their kind, and a first observation of the $B^\pm \to (D \pi^0)_{D^*} \pi^\pm$ decay is made with a significance of 6.1 standard deviations. All $C\!P$ observables are measured with world-best precision, and in combination with other LHCb results will provide strong constraints on the CKM angle $\gamma$.

Item Type: Article
Additional Information: All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2020-036.html (LHCb public pages)
Uncontrolled Keywords: B physics, CKM angle gamma, CP violation, Hadron-Hadron scattering (experiments)
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 10 May 2021 10:28
Last Modified: 14 Mar 2024 23:02
DOI: 10.1007/JHEP04(2021)081
Open Access URL: https://link.springer.com/content/pdf/10.1007/JHEP...
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3121646