The Mit Bag Model

TLDR: A review of recent developments of the bag-based model can be found in this paper, with a brief introduction to the model in the static cavity approximation and a discussion of deformations applied to a calculation of the electric polarizability of the π meson and applied to rotationally excited states.

Abstract: Since its formulation in 1974, the MIT bag model in various versions has acquired a considerable following. It is neither possible nor desirable for me to attempt to review all of the bag related developments of the past five years. A few works of a review nature exist. These are listed in Ref. 1–4. I shall give a brief introduction to the model in the static cavity approximation, since this approach has been the starting point for many applications. Following this is a discussion of deformations of the bag, applied to a calculation of the electric polarizability of the π meson, and applied to rotationally excited states. Some recent results regarding hadronic interactions are reviewed, in particular, for low energy nucleon-nucleon interactions and for meson-meson interactions. Finally, I shall discuss some recent efforts at treating low energy pion interactions in the bag model using PCAC.