
\documentclass[border=5pt,multi=true]{standalone}
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\usepackage{ulem}
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\usepackage{mciteplus}


\graphicspath{{./figs/}}

\begin{document}
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  \centering
  \begin{picture}(150,120)
    \put(  0, 60){ 
      \includegraphics*[width=75mm,height=60mm,%
      ]{Fig3a.pdf}
    }
    \put( 75, 60){ 
      \includegraphics*[width=75mm,height=60mm,%
      ]{Fig3b.pdf}
    }
    \put(  0,  0){ 
      \includegraphics*[width=75mm,height=60mm,%
      ]{Fig3c.pdf}
    }
    \put( 75,  0){ 
      \includegraphics*[width=75mm,height=60mm,%
      ]{Fig3d.pdf}
    }
    \put(  1, 75) { \begin{sideways}Candidates/(20\ensuremath{{\mathrm{\,Me\kern -0.1em V\!/}c^2}}\xspace)\end{sideways}} 
    \put( 76, 75) { \begin{sideways}Candidates/(2\ensuremath{{\mathrm{\,Me\kern -0.1em V\!/}c^2}}\xspace) \end{sideways}} 
    \put(  1, 15) { \begin{sideways}Candidates/(2\ensuremath{{\mathrm{\,Me\kern -0.1em V\!/}c^2}}\xspace) \end{sideways}} 
    \put( 76, 15) { \begin{sideways}Candidates/(2\ensuremath{{\mathrm{\,Me\kern -0.1em V\!/}c^2}}\xspace) \end{sideways}} 
    \put( 35, 61) { $m_{\ensuremath{\ensuremath{\mu}\xspace^+\ensuremath{\mu}\xspace^-}\xspace}$      } \put( 57, 61) { $\left[\!\ensuremath{{\mathrm{\,Ge\kern -0.1em V\!/}c^2}}\xspace\right]$ }  
    \put(110, 61) { $m_{\ensuremath{\ensuremath{\ensuremath{K}\xspace}\xspace^-}\xspace\ensuremath{\ensuremath{\ensuremath{\pi}\xspace}\xspace^+}\xspace\ensuremath{\ensuremath{\ensuremath{\pi}\xspace}\xspace^+}\xspace}$ } \put(132, 61) { $\left[\!\ensuremath{{\mathrm{\,Ge\kern -0.1em V\!/}c^2}}\xspace\right]$ }  
    \put( 35,  1) { $m_{\ensuremath{\ensuremath{\ensuremath{K}\xspace}\xspace^-}\xspace\ensuremath{\ensuremath{\ensuremath{\pi}\xspace}\xspace^+}\xspace\ensuremath{\ensuremath{\ensuremath{\pi}\xspace}\xspace^+}\xspace}$ } \put( 57,  1) { $\left[\!\ensuremath{{\mathrm{\,Ge\kern -0.1em V\!/}c^2}}\xspace\right]$ }  
    \put(110,  1) { $m_{\ensuremath{\ensuremath{\ensuremath{K}\xspace}\xspace^-}\xspace\ensuremath{\ensuremath{\ensuremath{\pi}\xspace}\xspace^+}\xspace\ensuremath{\ensuremath{\ensuremath{\pi}\xspace}\xspace^+}\xspace}$ } \put(132,  1) { $\left[\!\ensuremath{{\mathrm{\,Ge\kern -0.1em V\!/}c^2}}\xspace\right]$ }  
    \put( 47,108) { a)~$\begin{array}{l} \mbox{LHCb}\xspace \\ \Upsilon\ensuremath{\ensuremath{\ensuremath{D}\xspace}\xspace^+}\xspace\end{array}$ }
    \put(122,108) { b)~$\begin{array}{l} \mbox{LHCb}\xspace \\ \ensuremath{\Upsilon\mathrm{(1S)}}\xspace\ensuremath{\ensuremath{\ensuremath{D}\xspace}\xspace^+}\xspace\end{array}$ }
    \put( 47, 48) { c)~$\begin{array}{l} \mbox{LHCb}\xspace \\ \ensuremath{\Upsilon\mathrm{(2S)}}\xspace\ensuremath{\ensuremath{\ensuremath{D}\xspace}\xspace^+}\xspace\end{array}$ }
    \put(122, 48) { d)~$\begin{array}{l} \mbox{LHCb}\xspace \\ \ensuremath{\Upsilon\mathrm{(3S)}}\xspace\ensuremath{\ensuremath{\ensuremath{D}\xspace}\xspace^+}\xspace\end{array}$ }
  \end{picture}
\end{document}
