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T: Fachverband Teilchenphysik
T 81: Flavour physics IV
T 81.3: Vortrag
Donnerstag, 18. März 2021, 16:30–16:45, Tf
Inclusive tagging search for B± → K± ν ν at the Belle II experiment, with focus on a novel validation procedure. — •Filippo Dattola — Deutsches Elektronen-Synchrotron (DESY), Hamburg, Germany
The experimental measurement of the rare, flavour-changing neutral current decay B± → K± ν ν represents a powerful probe allowing to test the validity of the Standard Model and the possible existence of physics beyond it. Predicted with high level of accuracy by the Standard Model, the decay has not been experimentally observed yet. A search for the decay is performed by means of an inclusive tagging technique applied to a data sample, collected by the Belle II experiment at the Υ (4S) resonance mass, corresponding to an integrated luminosity of 63 fb−1. Particular focus in this talk will be given to a novel approach that enables to validate the inclusive tagging technique on the B± → J/ψ K± control channel by modifying the reconstructed events in order to reproduce the topology and the kinematics of the B± → K± ν ν events of interest.