b->snunu at Belle II

Sumitted to PubDB: 2021-11-23

Category: Talk, Visibility: Public

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Authors	Filippo Dattola
Date	Sept. 6, 2021
Belle II Number	BELLE2-TALK-CONF-2021-136
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.
Conference	Anomalies and Precision in the Belle II era workshop