000002028 001__ 2028
000002028 005__ 20200723161035.0
000002028 037__ $$aBELLE2-NOTE-PL-2020-012
000002028 041__ $$aeng
000002028 100__ $$aThe Belle II Collaboration
000002028 245__ $$aSearch for an invisible Z' in e+ e- -> mu+ mu- + missing energy final states in early phase 3 data
000002028 260__ $$a$$c2020-07-23
000002028 300__ $$amult. p
000002028 520__ $$aThis note presents plots associated with the search for an invisible $Z^{\prime}$ in $e^+ e^- \rightarrow \mu^+ \mu^-$ + missing energy final states targeting early phase 3 data. Plots include a distribution of the remaining backgrounds expected from simulation after event selection and a MVA classification. Furthermore we show the expected 90\% CL$_s$ upper limits obtained for different simulated analysis conditions for both the cross section $\sigma ($e$^+ $e$^- \rightarrow\ \mu^+ \mu^-\ $inv.$)$ as well as the associated $Z^{\prime}$ coupling constant in the framework of an $L_{\mu}$ − $L_{\tau}$ theory.
000002028 8560_ $$fpaul.feichtinger@desy.de
000002028 8564_ $$uhttps://docs.belle2.org/record/2028/files/BELLE2-NOTE-PL-2020-012.pdf