Just for the record. A nice formatting can be done with the
authblk package for title formatting, several other packages for minor tweaks and some own structures. See sample below.
Code: Select all
\documentclass[10pt,a4paper]{article}
\usepackage[T1]{fontenc}
\usepackage{inputenc}
\usepackage[english]{babel}
\usepackage[nohead,includefoot,margin=2cm]{geometry}
\usepackage[compact,raggedright,small]{titlesec}
\usepackage[affil-it]{authblk}
\usepackage[runin]{abstract}
\usepackage{multicol}
\usepackage{blindtext}
% General settings
\setlength{\columnsep}{6mm}
% New commands and environments
\newcommand*{\pacsname}{PACS numbers}
\newenvironment{pacs}{%
\begin{list}{}{%
\settowidth{\labelwidth}{\pacsname:}
\setlength{\leftmargin}{\labelwidth}
\addtolength{\leftmargin}{\labelsep}
}
\item[\pacsname:]
}
{\end{list}}
% Title setup (authblk)
\addto{\Affilfont}{\small}
\renewcommand{\Authfont}{\normalsize}
\title{\large\bfseries Evidence for spatial variation of the fine structure constant}
\date{\small (Dated August 25, 2010)}
\author[1]{J. K. Webb}
\author[1]{J. A. King}
\author[2]{M. T. Murphy}
\author[1]{V. V. Flambaum}
\author[3]{R. F. Carswell}
\author[1]{M. B. Bainbridge}
\affil[1]{School of Physics, University of New South Wales, Sydney, NSW 2052, Australia}
\affil[2]{Centre for Astrophysics and Supercomputing, Swinburne University of Technology,\par Mail H39, PO Box 218, Victoria 3122, Australia}
\affil[3]{Institute of Astronomy, Madingley Road, Cambridge, CB3 0HA, England}
\begin{document}
\maketitle
\begin{abstract}
\blindtext
\begin{pacs}
06.20.Jr, 95.30.Dr, 95.30.Sf, 98.62.Ra, 98.80.-k, 98.80.Es, 98.80.Jk
\end{pacs}
\end{abstract}
\begin{multicols}{2}
\blinddocument
\end{multicols}
\end{document}
The sample does not produce the mark on the left because as already mentioned this is done during compilation by arXiv.