Tests of lepton universality in B0 → K0S ℓ+ ℓ− and B+ → K*+ ℓ+ ℓ− decays where ℓ is either an electron or a muon are presented. The differential branching fractions of B0 → K0S e+ e− and B+ → K*+ e+ e− decays are measured in intervals of the dilepton invariant mass squared. The measurements are performed using proton-proton collision data recorded by the LHCb experiment, corresponding to an integrated luminosity of 9 fb^−1. The results are consistent with the standard model and previous tests of lepton universality in related decay modes. The first observation of B0 → K0S e+ e− and B+ → K*+ e+ e− decays is reported.

Tests of Lepton Universality Using B0 → K0S ℓ+ ℓ− and B+ → K*+ ℓ+ ℓ− Decays

Calabrese, R.;Capriotti, L.;Couturier, B.;Fiorini, M.;Franzoso, E.;Giugliano, C.;Guarise, M.;Kotriakhova, S.;Luppi, E.;Okamura, S.;Pappalardo, L. L.;Passalacqua, B.;Tomassetti, L.;
2022

Abstract

Tests of lepton universality in B0 → K0S ℓ+ ℓ− and B+ → K*+ ℓ+ ℓ− decays where ℓ is either an electron or a muon are presented. The differential branching fractions of B0 → K0S e+ e− and B+ → K*+ e+ e− decays are measured in intervals of the dilepton invariant mass squared. The measurements are performed using proton-proton collision data recorded by the LHCb experiment, corresponding to an integrated luminosity of 9 fb^−1. The results are consistent with the standard model and previous tests of lepton universality in related decay modes. The first observation of B0 → K0S e+ e− and B+ → K*+ e+ e− decays is reported.
2022
Aaij, R.; Abdelmotteleb, A. S. W.; Abellán Beteta, C.; Abudinén, F.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Afsharnia, H.; Agapopoulou, C.; Aidala, C...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/2500481
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