deletions | additions       diff --git a/section_b_tagging_I_started__.tex b/section_b_tagging_I_started__.tex  index a003b55..d109720 100644  --- a/section_b_tagging_I_started__.tex  +++ b/section_b_tagging_I_started__.tex 
...
\item Considering a set of tracks ask the questions: what is the probability that, if they come from the decay of a zero-lifetime hadron, I measure these set of impact paramters or larger IP?  \item Considering a set of tracks reconstruct the primary and the secondary vertex, and understand if it is significantly displaced or not.  \end{itemize}  We basically follow the first one because: it's easier, we don't need the reconstruction of the secondary vertex and with the tools we have it's not possible to do this.\\  Indeed in Papas (for the moment) there is no smearing on the parameters of the track, but only on the absolute value of the momentum. So we implemented a smearing directly in the IP of the track.  \subsection{Theoretical procedure}  Basically the procedure is the following:  \begin{itemize} 
...
\end{itemize}  Here is the definition of the IP:  \subsection{Implementation}  We implemented the algorithm in this way,