A measurement of the flavor-untagged decay-time-integrated CP asymmetry in the flavor-specific decay Bs0->Ds-pi+, , is performed using proton-proton collision data collected by the LHCb experiment between 2016 and 2018 at a center-of-mass energy of 13 TeV, corresponding to a total integrated luminosity of 5.4 fb-1. The CP asymmetry is measured in two Ds- meson decay modes, Ds- -> K-K+pi- and Ds-→pi-pi+pi-. The combined result, =(-1.4 \pm 5.9(stat) \pm 1.1(syst))×10-3, is consistent with the Standard Model expectation and provides a direct constraint on new physics in tree-level b-hadron decays.
First Measurement of the Decay-Time-Integrated CP Asymmetry in Bs0 -> Ds- pi+ Decays
Celestino I.Membro del Collaboration Group
;Cordova G.Membro del Collaboration Group
;Kleijne N.Membro del Collaboration Group
;Morello M. J.Membro del Collaboration Group
;Passaro D.Membro del Collaboration Group
;Pica L.Membro del Collaboration Group
;Riccardi D.Membro del Collaboration Group
;Xu A.Membro del Collaboration Group
;
2026
Abstract
A measurement of the flavor-untagged decay-time-integrated CP asymmetry in the flavor-specific decay Bs0->Ds-pi+, , is performed using proton-proton collision data collected by the LHCb experiment between 2016 and 2018 at a center-of-mass energy of 13 TeV, corresponding to a total integrated luminosity of 5.4 fb-1. The CP asymmetry is measured in two Ds- meson decay modes, Ds- -> K-K+pi- and Ds-→pi-pi+pi-. The combined result, =(-1.4 \pm 5.9(stat) \pm 1.1(syst))×10-3, is consistent with the Standard Model expectation and provides a direct constraint on new physics in tree-level b-hadron decays.File in questo prodotto:
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