A measurement of CP-violating observables is performed using the decays B± → D K± and B± → D π±, where the D meson is reconstructed in one of the self-conjugate three-body final states K0S π+ π− and K0S K+ K− (commonly denoted K0S 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 (68.7{−5.1}{+5.2})∘. The hadronic parameters r_B^DK, r_B^Dπ, δ_B^DK, and δ_B^Dπ, which are the ratios and strong-phase differences of the suppressed and favoured B± decays, are also reported.

Aaij, R., Abellán Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., et al. (2021). Measurement of the CKM Angle γ in B± → D K± and B± → D π± Decays with D → K0S h+ h−. JOURNAL OF HIGH ENERGY PHYSICS, 2021(2), 1-35 [10.1007/JHEP02(2021)169].

Measurement of the CKM Angle γ in B± → D K± and B± → D π± Decays with D → K0S h+ h−

Betti, F.;Capriotti, L.;Carbone, A.;Ferrari, F.;Galli, D.;Maccolini, S.;Manuzzi, D.;Patrignani, C.;Perazzini, S.;Pisani, F.;Zucchelli, S.;
2021

Abstract

A measurement of CP-violating observables is performed using the decays B± → D K± and B± → D π±, where the D meson is reconstructed in one of the self-conjugate three-body final states K0S π+ π− and K0S K+ K− (commonly denoted K0S 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 (68.7{−5.1}{+5.2})∘. The hadronic parameters r_B^DK, r_B^Dπ, δ_B^DK, and δ_B^Dπ, which are the ratios and strong-phase differences of the suppressed and favoured B± decays, are also reported.
2021
Aaij, R., Abellán Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., et al. (2021). Measurement of the CKM Angle γ in B± → D K± and B± → D π± Decays with D → K0S h+ h−. JOURNAL OF HIGH ENERGY PHYSICS, 2021(2), 1-35 [10.1007/JHEP02(2021)169].
Aaij, R.; Abellán Beteta, C.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Afsharnia, H.; Aidala, C.A.; Aiola, S.; Ajaltouni, Z.; Akar, S.; Albrecht, J.; A...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/848620
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