Dataset: NLO QCD parton shower matching for $p p \rightarrow e^{+} \nu_e \mu^{-} \bar{\nu}_{\mu} \gamma + X$ simulated using Herwig 7.3 interfaced with VBFNLO 3.0 via BLHA2.

Data files for different observable histograms for NLO QCD parton shower matching for $p p \rightarrow e^{+} \nu_e \mu^{-} \bar{\nu}_{\mu} \gamma + X$ simulated using Herwig 7.3 interfaced with VBFNLO 3.0 via BLHA2. Parameters: PDF: CT18LO (LO), CT18NLO (NLO) Four active scheme. EW parameters: \begin{align} m_W & = 80.3770\; {\rm GeV}, \; \Gamma_W = 2.085\; {\rm GeV} \nonumber \\ m_Z & = 91.1876\; {\rm GeV}, \; \Gamma_Z = 2.495\; {\rm GeV} \nonumber \\ G_F & = 1.16637\cdot10^{-5}\; {\rm GeV^{-2}}.\end{align} $\mu_F$ = $\mu_R$ = $m_{\rm EW}$ generation-level cuts: \begin{align} & p_{T, \ell} > 10\, {\rm GeV},\quad |\eta_{\ell}| < 5.0 \nonumber \\ & p_{T, \gamma} > 10\, {\rm GeV}, \quad|\eta_{\gamma}| < 5.0, \nonumber \\ & \Delta R_{\ell \gamma} > 0.3,\quad \end{align} analysis-level cuts\begin{align} & p_{T, \ell} > 30\, {\rm GeV},\quad |\eta_{\ell}| < 2.5 \nonumber \\ & p_{T, \gamma} > 30\, {\rm GeV}, \quad|\eta_{\gamma}| < 2.5,\nonumber \\ & \Delta R_{\ell \gamma} > 0.7,\quad \end{align} Two different datasets are given: Herwig + VBFNLO data files The name of the file describes the corresponding observable, The columns represent: left bin boundary, right bin boundary, value, low-y error, high-y error. VBFNLO standalone data files Name of the observable in the first line inside the file, columns represent: left bin boundary, right bin boundary, value, y-error