Tests of lepton universality in B 0 → K 0 S ℓ + ℓ − and B + → K * + ℓ + ℓ − decays where ℓ is either an electron or a muon are presented. The differential branching fractions of B 0 → K 0 S 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 B 0 → K 0 S e + e − and B + → K * + e + e − decays is reported.

Tests of lepton universality using B0 ? KS0 â„“+â„“- and B+ ?k*+â„“+â„“- decays / Aaij, R., Abdelmotteleb, A.S.W., Beteta, A.C., Abudinén, F., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., Agapopoulou, C., Aidala, C.A., Aiola, S., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., Aliouche, Z., Alkhazov, G., Cartelle, A.P., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 128:19(2022). [10.1103/PhysRevLett.128.191802]

Tests of lepton universality using B0 ? KS0 â„“+â„“- and B+ ?k*+â„“+â„“- decays

Casse, G.;Sarti, A.;
2022

Abstract

Tests of lepton universality in B 0 → K 0 S ℓ + ℓ − and B + → K * + ℓ + ℓ − decays where ℓ is either an electron or a muon are presented. The differential branching fractions of B 0 → K 0 S 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 B 0 → K 0 S e + e − and B + → K * + e + e − decays is reported.
2022
Particles and Fields, Branching ratios, CP violation
01 Pubblicazione su rivista::01a Articolo in rivista
Tests of lepton universality using B0 ? KS0 â„“+â„“- and B+ ?k*+â„“+â„“- decays / Aaij, R., Abdelmotteleb, A.S.W., Beteta, A.C., Abudinén, F., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., Agapopoulou, C., Aidala, C.A., Aiola, S., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., Aliouche, Z., Alkhazov, G., Cartelle, A.P., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 128:19(2022). [10.1103/PhysRevLett.128.191802]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1673137
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