Lepton-Flavor-Dependent Angular Analysis of B →k∗ℓ+ℓ-

(Belle Collaboration)

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321 Scopus citations


We present a measurement of angular observables and a test of lepton flavor universality in the B→K∗ℓ+ℓ- decay, where ℓ is either e or μ. The analysis is performed on a data sample corresponding to an integrated luminosity of 711 fb-1 containing 772×106 BB pairs, collected at the (4S) resonance with the Belle detector at the asymmetric-energy e+e- collider KEKB. The result is consistent with standard model (SM) expectations, where the largest discrepancy from a SM prediction is observed in the muon modes with a local significance of 2.6σ.

Original languageEnglish
Article number111801
JournalPhysical Review Letters
Issue number11
StatePublished - 13 Mar 2017


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