Update on Overleaf.

sections/goal.tex

@@ -1,4 +1,4 @@
-\section{Physics example: $H \rightarrow ZZ \rightarrow 4l$}
+\section{Physics example: H $\rightarrow$ ZZ $\rightarrow$ 4l}
 \justifying
 \paragraph{}
 The goal of this exercise is to reconstruct the standard model (SM) Higgs boson mass, using a selection targeting the four-lepton final state. This is considered a \textit{golden} channel to measure the properties of the Higgs boson because:

sections/producer.tex

@@ -1 +1,5 @@
 \section{Writing a Producer}\label{sec:producer}
+
+The \CCSPStlye{Producer} class is used to calculate higher-level observables and define new columns to be written o disk. The corresponding task is called \CCSPStlye{cf.ProduceColumns} (see Ref.~\cite{cf_repo} for detailed info). Naturally, we only want to compute these new variables for the relevant events for our analysis. Thus, the producers are executed after the selection step. 
+
+In this part of the tutorial, we will write a producer which calculates the four lepton invariant mass.