Search for an invisibly decaying $Z^{\prime}$ boson at Belle II in $e^+ e^{\mathstrut -} \to \mu^+ \mu^{\mathstrut -} (e^{\pm} \mu^{\mp})$ + missing energy final states

Abstract None
Tags
Working group Dark Sector and Low Multiplicity
Principal authors @  Michel Bertemes, Marcello Campajola, Luigi Corona, Giacomo De Pietro, Enrico Graziani, Gianluca Inguglia, Ilya Komarov, Alberto Martini, Laura Zani
Reference published in PRL
Document BELLE2-PUB-PH-2019-001
Links arXiv:1912.11276, Inspire,