deletions | additions       diff --git a/measured_a/livetime/livetime.tex b/measured_a/livetime/livetime.tex  new file mode 100644  index 0000000..2651d81  --- /dev/null  +++ b/measured_a/livetime/livetime.tex 
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%During the experiment we only had of the triggers information.   For reasons that we have been unable to establish, only information about the total number of  triggers and the number of triggers of one of the helicity signs were recorded. In addition to the   resulting ambiguity about the helicity of the recorded triggers, this issue made it impossible   to calculate the livetime in the conventional way. % for positive helicity events.   \begin{equation}  l=\frac{N_{triggers}}{N_{scalers}}  \end{equation}  As a solution we used the scaler and trigger information for negative helicity only.   For each run we plotted the livetime corresponding to negative helicity versus   the number of electrons, based on the number of recorded events. The distribution   was parametrized using a second degree polynomial. Figure~\ref{fig:livetime} shows   the distribution of livetime versus number of recorded triggers for negative   helicity events for one of the runs. The fitted histogram is the profile   of the distribution. The fit was used to calculate the livetime for both %negative and positive  helicity signs, using only the the number of recorded electrons. To decrease the uncertainty due   to the fit, the region of the fit was set as good region.   Data outside that region were not used in the analysis. The   procedure was done for each analyzed run to take into   account any changes from run to run (like efficiency of the detectors, thresholds, or dead channels).   \begin{figure}[htbp]  %\centering  %\hskip-5mm  %\epsfig{height=8cm,width=10cm,file=../measured_a/livetime/lifetime.eps}   \includegraphics*[height=8cm,width=3.2in,keepaspectratio]{../measured_a/livetime/lifetime.eps}  \vspace*{.2in}  \caption{\label{fig:livetime} Livetime dependence on the number of recorded triggers for negative helicity events.   The fitted histogram is the profile of the distribution.}  \end{figure}