# 30th International Symposium on Lepton Photon Interactions at High Energies

Jan 10 – 14, 2022
Online only
Europe/London timezone

## $B\to K \nu \bar\nu$ measurements and new physics

Jan 10, 2022, 4:20 PM
1m
Online only

Poster Flavour

### Speaker

Rusa Mandal (Siegen University)

### Description

Semileptonic flavor changing neutral current transitions with a pair of neutrinos in the final state are very accurately determined in the standard model. The most recent Belle II result on $B\to K \nu \bar\nu$ uses an innovative inclusive tagging technique; this together with previous BaBar and Belle results indicates a possible enhancement in the branching fraction of $B\to K \nu \bar\nu$. We have explored the possibilities of such an enhancement as a signal of new physics within several scenarios such as leptoquark and generic Z′ models, which can also explain some of the other tensions observed in neutral as well as charged current B-decays.

### Primary author

Rusa Mandal (Siegen University)

### Co-authors

Thomas Browder (University of Hawaii) Rahul Sinha (The Institute of Mathematical Sciences) Nilendra Deshpande (University of Oregon)

### Presentation materials

 LP_RusaMandal.mp4 LP_RusaMandal.pdf