New Physics Model in Sixtrack package

SixTrack is a 6D particle tracking code used to compute the trajectories of individual relativistic charged particles in circular accelerators. It uses various physics models to apply the effect of different accelerator elements via mapping formulae. Sixtrack is missing a few models implementation which are required to achieve higher accuracy in particle tracking. This project will aim to implement and test these new models with the goal of adding them in the official code.