A flavor-tagged time-dependent analysis of B0->KS0mu+mu- decays is performed across the full dimuon mass range excluding the J/Psi and Psi(2S) resonance regions. The analysis uses proton-proton collision data collected by the LHCb experiment in 2011-2018 at center-of-mass energies of 7, 8, and 13 TeV, corresponding to an integrated luminosity of 9 fb-1. The CP violation parameters are determined to be C=-0.13\pm 0.32 \pm 0.04, S=+0.82\pm 0.29\pm 0.05, where the first uncertainties are statistical and the second are systematic. The results are consistent with the standard model prediction. This is the first experimental study of time-dependent CP violation in b->s\ell+\ell- processes.

First Measurement of Time-Dependent CP Violation in the Flavor-Changing Neutral-Current Decay B0 -> KS0 mu+mu-

Celestino I.
Membro del Collaboration Group
;
Cordova G.
Conceptualization
;
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 flavor-tagged time-dependent analysis of B0->KS0mu+mu- decays is performed across the full dimuon mass range excluding the J/Psi and Psi(2S) resonance regions. The analysis uses proton-proton collision data collected by the LHCb experiment in 2011-2018 at center-of-mass energies of 7, 8, and 13 TeV, corresponding to an integrated luminosity of 9 fb-1. The CP violation parameters are determined to be C=-0.13\pm 0.32 \pm 0.04, S=+0.82\pm 0.29\pm 0.05, where the first uncertainties are statistical and the second are systematic. The results are consistent with the standard model prediction. This is the first experimental study of time-dependent CP violation in b->s\ell+\ell- processes.
2026
Settore FIS/01 - Fisica Sperimentale
Settore PHYS-01/A - Fisica sperimentale delle interazioni fondamentali e applicazioni
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11384/173383
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