The Full Event Interpretation -- An exclusive tagging algorithm for the Belle II experiment

Abstract

The Full Event Interpretation is presented: a new exclusive tagging algorithm used by the high-energy physics experiment Belle II. The experimental setup of Belle II allows the precise measurement of otherwise inaccessible $B$ meson decay-modes. The Full Event Interpretation algorithm enables many of these measurements. The algorithm relies on machine learning to automatically identify plausible $B$ meson decay chains based on the data recorded by the detector. Compared to similar algorithms employed by previous experiments, the Full Event Interpretation provides a greater efficiency, yielding a larger effective sample size usable in the measurement.

11 pages, 7 figures, 1 table

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• Search for lepton flavor-violating decay modes $B^0\to K^{\ast 0}{\tau }^{\pm }{\ell }^{\mp }$ ($\ell =e,\mu$) with hadronic B-tagging at Belle and Belle II
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