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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.



