Measurement of the CKM angle γ in <i>B</i><SUP>±</SUP> → <i>DK</i><SUP>±</SUP> and <i>B</i><SUP>±</SUP> → <i>Dπ</i><SUP>±</SUP> decays with <i>D</i> → <i>K</i><sub>S</sub><SUP>0</SUP><i>h</i><SUP>+</SUP><i>h<SUP>-</SUP></i>



Aaij, R, Beteta, C Abellan, Adeva, B, Adinolfi, M, Aidala, CA, Ajaltouni, Z, Akar, S, Albicocco, P, Albrecht, J, Alessio, F
et al (show 834 more authors) (2021) Measurement of the CKM angle γ in <i>B</i><SUP>±</SUP> → <i>DK</i><SUP>±</SUP> and <i>B</i><SUP>±</SUP> → <i>Dπ</i><SUP>±</SUP> decays with <i>D</i> → <i>K</i><sub>S</sub><SUP>0</SUP><i>h</i><SUP>+</SUP><i>h<SUP>-</SUP></i>. JOURNAL OF HIGH ENERGY PHYSICS, 2021 (2). 169-.

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Abstract

A measurement of $CP$-violating observables is performed using the decays $B^\pm\to D K^\pm$ and $B^\pm\to D \pi^\pm$, where the $D$ meson is reconstructed in one of the self-conjugate three-body final states $K_{\mathrm S}\pi^+\pi^-$ and $K_{\mathrm S}K^+K^-$ (commonly denoted $K_{\mathrm S} h^+h^-$). The decays are analysed in bins of the $D$-decay phase space, leading to a measurement that is independent of the modelling of the $D$-decay amplitude. The observables are interpreted in terms of the CKM angle $\gamma$. Using a data sample corresponding to an integrated luminosity of $9\,\text{fb}^{-1}$ collected in proton-proton collisions at centre-of-mass energies of $7$, $8$, and $13\,\text{TeV}$ with the LHCb experiment, $\gamma$ is measured to be $\left(68.7^{+5.2}_{-5.1}\right)^\circ$. The hadronic parameters $r_B^{DK}$, $r_B^{D\pi}$, $\delta_B^{DK}$, and $\delta_B^{D\pi}$, which are the ratios and strong-phase differences of the suppressed and favoured $B^\pm$ decays, are also reported.

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-2020-019.html (LHCb public pages)
Uncontrolled Keywords: B physics, CKM angle gamma, CP violation, Flavor physics, Hadron-Hadron scattering (experiments)
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 01 Sep 2021 10:37
Last Modified: 14 Mar 2024 23:05
DOI: 10.1007/JHEP02(2021)169
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3134993