Der Error:
I was expecting to see `<', `=', or `>'. Didn't.
! Missing = inserted for \ifdim.
A number should have been here; I inserted `0'.
! Illegal unit of measure (pt inserted).
\documentclass{beamer}
\mode<presentation> {
%\usetheme{Warsaw}
\usecolortheme{wolverine}
\usepackage{graphicx}
\usepackage{booktabs}
\usepackage{ amssymb }
\title[Short title]{Z physics}
\author{name} e
\date{\today}
\begin{document}
\begin{frame}
\frametitle{Drell Yan }
$116 GeV < m_{ll} < 1500 GeV$
\begin{block}{$Z/\gamma^{\ast} \rightarrow e^{+}e^{-}$}
event selection:\
\begin{itemize}
\item $p_{T} > 400MeV$
\item $E_{T} > 20GeV$
\end{itemize}
dominate background: \
W +jets and dijet (misidentified e)
\begin{equation}
\frac{d\sigma}{dm_{ll}}= \frac{N_{data}-N_{bkg}}{C_{DY}L_{int}}\frac{1}{\Gamma_{bin}}
\end{equation}
\end{block}
\begin{figure}
\includegraphics[scale=0.3\textwidth]{eventshighpt.png}
\end{figure}
\end{frame}
