Measurements of the branching fraction ratio B(phi->mu+mu-)/B(phi->e+e-) with Ds+->pi+phi and D+-> pi+phi decays, denoted Rphipis and Rphiphid, are presented. The analysis is performed using a dataset corresponding to an integrated luminosity of 5.4 fb-1 of pp collision data collected with the LHCb experiment. The branching fractions are normalised with respect to the B+ -> K+J/Psi(->e+e-) and B+ ->K+J/Phi(→ mu+mu-) decay modes. The combination of the results yields (Formula presented.) The result is compatible with previous measurements of the phi -> ell+ell- branching fractions and predictions based on the Standard Model.
Measurements of the branching fraction ratio B(phi->mu+mu-)/B(phi->e+e-) with charm meson decays
Bassi 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
;Ribatti R.Membro del Collaboration Group
;Riccardi D.Membro del Collaboration Group
;
2024
Abstract
Measurements of the branching fraction ratio B(phi->mu+mu-)/B(phi->e+e-) with Ds+->pi+phi and D+-> pi+phi decays, denoted Rphipis and Rphiphid, are presented. The analysis is performed using a dataset corresponding to an integrated luminosity of 5.4 fb-1 of pp collision data collected with the LHCb experiment. The branching fractions are normalised with respect to the B+ -> K+J/Psi(->e+e-) and B+ ->K+J/Phi(→ mu+mu-) decay modes. The combination of the results yields (Formula presented.) The result is compatible with previous measurements of the phi -> ell+ell- branching fractions and predictions based on the Standard Model.| File | Dimensione | Formato | |
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JHEP05(2024)293.pdf
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