10-17 July 2019
Europe/Brussels timezone

Measurement of Lepton Flavor Universality in B decays at Belle

12 Jul 2019, 14:50
Campus Ledeganck - Aud. 5 (Ghent)

Campus Ledeganck - Aud. 5


Parallel talk Flavour Physics and CP Violation Flavour Physics and CP Violation


Seema Choudhury (IIT Hyderabad)


Recent anomalies of lepton flavor universality violation (LFUV) in B decays could be a hint of new physics. We report new measurements of LFUV observable R(K) and R(K*), the branching fraction of $B \to K^{(*)} \mu^+ \mu^-$ to $B \to K^{(*)} e^+ e^-$, at Belle. The analyses are based on the full data set recorded by the Belle detector at the $\Upsilon(4S)$ resonance containing 772 million $B\bar{B}$ pairs from e+ e- collisions produced by the KEKB collider.

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