Filippo Dattola

06 September 2021
Anomalies and Precision in the Belle II era workshop

Abstract: This contribution illustrates a new search for the flavor-changing neutral-current decay B+→K+νν performed by the Belle II experiment at the SuperKEKB asymmetric-energy electron-positron collider. In this study, a sample corresponding to an integrated luminosity of 63 fb-1 collected at the Υ(4S) resonance and an additional sample of 9 fb-1 collected at an energy 60 MeV below the resonance are used. A novel technique, based on an inclusive tagging method and exploiting the topological features of the B+→K+νν decay, is employed and it provides a higher signal efficiency with respect to the methods used in the previous searches. Future prospects and extensions of the inclusive tagging are also illustrated.