Department
Physics
Document Type
Article
Publication Date
3-2017
Embargo Period
7-3-2018
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 Υ(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.
Journal Title
Physical Review Letters
Journal ISSN
0031-9007
Volume
118
Issue
11
Digital Object Identifier (DOI)
10.1103/PhysRevLett.118.111801
Comments
Preprint.