Measurements of Electroweak Penguin Processes b->d,s gamma and b->sl+l- at Belle

TL;DR

This paper reports measurements of electroweak penguin processes involving b->d,s gamma and b->sl+l- transitions at the Belle experiment, providing preliminary results on these rare decays using a large dataset.

Contribution

First measurements of electroweak penguin processes at Belle, including exclusive and semi-inclusive analyses of rare B meson decays.

Findings

Measurements of B0->rho0 gamma and B0->omega gamma decays.

Semi-inclusive measurements of b->s gamma and b->sl+l- processes.

Preliminary results indicating progress in understanding rare B decays.

Abstract

We report the measurements of electroweak penguin processes b->d,s gamma and b->sl+l- at the Belle experiment. The analyses are based on 152 million BB-bar events collected at the Upsilon(4S) resonance with the Belle detector at the KEKB e+e- asymmetric-energy collider. The b->d gamma transition is studied through exclusive decays: B0->rho0 gamma, B0->omega gamma and B+ ->rho+ gamma. We apply fully inclusive and semi-inclusive reconstruction to b->s gamma and b->sl+l- processes, respectively. The results on the exclusive b->d gamma and semi-inclusive b->sl+l- measurements are preliminary.