\begin
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\documentclass[]{HLreport}
%\documentclass[]{mycernart}
%\documentclass[preprint,prstab,showpacs,floatfix, cite]{revtex4}
%\documentclass{article}
\usepackage{booktabs}
\usepackage{afterpage}
\usepackage[T1]{fontenc}
\usepackage{textcomp}
\usepackage{graphicx,mathptmx,amsmath,amsfonts,amscd,amsthm,amssymb,eucal,psfrag,color,subfig,url}
% The pstcol package has been removed as it is declared as obsolete.
\def\permille{\ensuremath{{}^\text{o}\mkern-5mu/\mkern-3mu_\text{oo}}}
\typist{author.email@cern.ch}
\documentlabel{CERN-ACC-2xxx-xxxx}
\begin{document}
\title{HiLumi report title}
\author{\it Author names, CERN, Geneva, Switzerland.}
%\email{author.email@cern.ch}
%\affiliation{CERN, CH 1211 Geneva 23, Switzerland}
\abstract{
This is a short abstract.
}
\maketitle
\tableofcontents
%\newpage
\section{Introduction}
This is a section.
\begin{table}
\centering
\begin{tabular}{|c|c|c|c|c|}
\cline{2-5}
\multicolumn{1}{c|}{} & \multicolumn{2}{c|}{Horizontal} & \multicolumn{2}{c|}{Vertical} \\
\hline
BPM set & $\left<\frac{\Delta \beta}{\beta}\right>\ [\%] $ & $\left<\frac{|\beta_{\textmd{amplitude}}-\beta_{\textmd{phase}}|}{\sigma_{\rm phase}}\right> $ & $\left<\frac{\Delta \beta}{\beta}\right>\ [\%] $ & $\left<\frac{|\beta_{\textmd{amplitude}}-\beta_{\textmd{phase}}|}{\sigma_{\rm phase}}\right> $ \\
\hline
Arcs & 0.83 & 4 & -0.44 & 11 \\
\hline
% IRs & -2.7 & 4.9 & -7.9 & 7.69 \\
% \hline
Inside triplets & -6.0 & 3 & -6.9 & 4 \\
\hline
\end{tabular}%
\caption{A caption.}
\label{tab:averagevsrms_beam1}%
\end{table}%
\subsection{LHC experience}
This is a subsection.
\section*{Acknowledgments}
Research supported by the HL-LHC project.
\begin{thebibliography}{90}
\bibitem{review} A reference
\end{thebibliography}
\end{document}