Measurement of the CKM angle γ in B± → DK± and B± → Dπ± decays with D → $$ {K}_{\mathrm{S}}^0 $$h+h-
A measurement of CP-violating observables is performed using the decays B± → DK± and B± → Dπ±, where the D meson is reconstructed in one of the self-conjugate three-body final states \( {K}_{\mathrm{S}}^0 \)π+π- and \( {K}_{\mathrm{S}}^0 \)K+K- (commonly denoted \( {K}_{\mathrm{S}}^0 \)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 inter- preted in terms of the CKM angle γ. Using a data sample corresponding to an integrated luminosity of 9 fb-1 collected in proton-proton collisions at centre-of mass energies of 7, 8, and 13 TeV with the LHCb experiment, γ is measured to be \( \left({68.7}_{-5.1}^{+5.2}\right){}^{\circ} \). The hadronic parameters \( {r}_B^{D K},{r}_B^{D\pi},{\delta}_B^{D K},\kern0.5em \mathrm{and}\kern0.5em {\delta}_B^{D\pi} \), which are the ratios and strong-phase differences of the suppressed and favoured B± decays, are also reported.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC). Nuclear Physics (NP)
- Contributing Organization:
- LHCb Collaboration
- Grant/Contract Number:
- 89233218CNA000001
- OSTI ID:
- 1878038
- Report Number(s):
- LA-UR-20-28342; TRN: US2307454
- Journal Information:
- Journal of High Energy Physics (Online), Vol. 2021, Issue 2; ISSN 1029-8479
- Publisher:
- Springer NatureCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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