PsiDecays
This code represents the work of my summer internship in 2013. The purpose of this code is twopart:

Investigate the invariant mass distributions of the product particles of three decays:
 $\psi(3770) \rightarrow D^0 \overline{D}^0$
 $B^+ \rightarrow D^0 \overline{D}^0 K^+$
 $D^0 \rightarrow K^+ K^ K^ \pi^+$

Investigate the decay angles between product pairs in the following two decays:
 $\psi(3770) \rightarrow D^0 \overline{D}^0$
 $B \rightarrow \left( \psi(3770) \rightarrow D^0 \overline{D}^0 \right) K$
These results demonstrate that the decay angle of the decays is sufficiently sharply peaked to be used as a discriminator from the background.
It can therefore be used to distinguish the $\psi(3770) \rightarrow D^0 \overline{D}^0$ decays for use in symmetry violation studies such as those measuring the strong phase information of the decay.