Fig. 2: Distributions of the combined NN output in the signal region.
From: Search for charged-lepton-flavour violation in Z-boson decays with the ATLAS detector
a,b, eτ events with 1P (a) and 3P (b) τhad-vis candidates. c,d, μτ events with 1P (c) and 3P (d) τhad-vis candidates. The expected contributions are determined in the fit to data. The expected signal, normalized to \({\mathcal{B}}(Z\to \ell \tau )=5\times 1{0}^{-4}\), is shown as a dashed red histogram in each plot. The panels below each plot show the ratios of the observed yields (dots) and the best-fit background-plus-signal yields (solid red line) to the best-fit background yields. The hatched error bands represent a one standard deviation of the combined statistical and systematic uncertainties. The statistical uncertainties on the data are shown as vertical bars. The last bin in each plot includes overflow events.
