
\documentclass[border=5pt,multi=true]{standalone}
\usepackage{standalone}
\usepackage{ifthen}
\usepackage{ulem}
\usepackage{microtype}
\usepackage{lineno}
\usepackage{xspace}
\usepackage{caption}
\usepackage{graphicx}
\usepackage{color}
\usepackage{colortbl}
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage{amsfonts}
\usepackage{upgreek}
\usepackage{hyperref}
\usepackage{hypcap}
\usepackage{xspace}
\usepackage{upgreek}
\usepackage{cite}
\usepackage{mciteplus}
\usepackage{multirow}
\usepackage{rotating}
\usepackage{comment}
\usepackage{cancel}


\graphicspath{{./figs/}}

\begin{document}
\DeclareGraphicsExtensions{.pdf}
\setlength{\unitlength}{1mm}
  \centering
  \begin{picture}(150,67)
    \put( 0,2){\includegraphics*[width=75mm,height=65mm]{Fig1a.pdf}}
    \put(80,2){\includegraphics*[width=75mm,height=65mm]{Fig1b.pdf}}
    \put( -5,20 )  { \begin{sideways}Candidates/(2$\ensuremath{{\mathrm{\,Me\kern -0.1em V\!/}c^2}}\xspace$)\end{sideways}  }
    \put( 75,20 )  { \begin{sideways}Candidates/(1$\ensuremath{{\mathrm{\,Me\kern -0.1em V\!/}c^2}}\xspace$)\end{sideways}  }
    \put( 105,0 )  { $ m(\ensuremath{{\ensuremath{J}\xspace\mskip -3mu/\mskip -2mu\ensuremath{\psi}\xspace\mskip 2mu}}\xspace\ensuremath{\ensuremath{p}\xspace}\xspace\ensuremath{\ensuremath{\ensuremath{K}\xspace}\xspace^-}\xspace)$ }
    \put(   6,0 )  { $ m(\ensuremath{\ensuremath{\psi}\xspace{(2\ensuremath{S}\xspace)}}\xspace[\ensuremath{\rightarrow}\xspace\ensuremath{\ensuremath{\mu}\xspace^+\ensuremath{\mu}\xspace^-}\xspace]\ensuremath{\ensuremath{p}\xspace}\xspace\ensuremath{\ensuremath{\ensuremath{K}\xspace}\xspace^-}\xspace)$ }
    \put( 51,0  )  { $\left[\ensuremath{{\mathrm{\,Ge\kern -0.1em V\!/}c^2}}\xspace\right]$ }
    \put( 131,0 )  { $\left[\ensuremath{{\mathrm{\,Ge\kern -0.1em V\!/}c^2}}\xspace\right]$ }
    \put( 10,53  ){ \small LHCb}
    \put( 90,53  ){ \small LHCb}
  \end{picture}
\end{document}
