Lepton-Flavor-Dependent Angular Analysis of B →k∗ℓ+ℓ-
Journal
Physical Review Letters
Journal Volume
118
Journal Issue
11
Date Issued
2017
Author(s)
Wehle S. et al.
Niebuhr, C.
Yashchenko, S.
Adachi, I.
Aihara, H.
Al Said, S.
Asner, D.M.
Aulchenko, V.
Aushev, T.
Ayad, R.
Aziz, T.
Abstract
We present a measurement of angular observables and a test of lepton flavor universality in the B→K??+?- decay, where ? 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. ? 2017 American Physical Society.
Subjects
Atomic physics; Physics; Angular analysis; Asymmetric energy; Belle detectors; Data sample; E+e- collider; Integrated luminosity; Lepton-flavor; Standard model; Elementary particles; article; expectation; flavor; lepton; prediction
Type
journal article