Test of Lepton-Flavor Universality in B →k∗ℓ+ℓ- Decays at Belle

Wehle, S. and Adachi, I. and Adamczyk, K. and Giri, Anjan Kumar et. al. (2021) Test of Lepton-Flavor Universality in B →k∗ℓ+ℓ- Decays at Belle. Physical Review Letters, 126 (161801). ISSN 00319007

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We present a measurement of RK∗, the branching fraction ratio B(B→K∗μ+μ-)/B(B→K∗e+e-), for both charged and neutral B mesons. The ratio for the charged case RK∗+ is the first measurement ever performed. In addition, we report absolute branching fractions for the individual modes in bins of the squared dilepton invariant mass q2. The analysis is based on a data sample of 711 fb-1, containing 772×106 BB¯ events, recorded at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. The obtained results are consistent with standard model expectations.

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IITH Creators:
IITH CreatorsORCiD
Giri, Anjan KumarUNSPECIFIED
Item Type: Article
Uncontrolled Keywords: Absolute branching fractions; Asymmetric energy; Belle detectors; Branching fractions; E+e- collider; Invariant mass; Lepton-flavor; Standard model
Subjects: Physics
Physics > Astronomy Astrophysics
Divisions: Department of Physics
Depositing User: . LibTrainee 2021
Date Deposited: 13 Jul 2021 09:14
Last Modified: 13 Jul 2021 09:14
URI: http://raiith.iith.ac.in/id/eprint/8285
Publisher URL:
OA policy: https://v2.sherpa.ac.uk/id/publication/13640
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