Speaker
PARK Junewoo
(東京大学)
Description
b->s nu nubar decay is theoretically clean and related to the righ-handed current. Because there is no right-handed current in the standard model, this decay is interesting. By measuring the upper limit of the branching ratio of b->s nu nubar decay, limits on the right-handed component of the Wilson coefficient can be obtained. In this presentation, we present B->Xs nu nubar analysis in Belle II experiment. We used sum of exclusive method. B->K(*) nu nubar MC sample is produced by the form factors. Non resonant B->Xs nu nubar sample is produced by the Fermi motion model. Powerful tools like full event interpretation(FEI) and FastBDT are used in the analysis.
