Skyrmions in Orientifold and Adjoint QCD

Understand

This is a review of recent developments regarding the Skyrmion sector of higher representation QCD.

• Ordinary QCD is a SU(n) gauge theory with n_f Dirac quarks in the fundamental representation.
• Changing the representation of quarks leads to different and interesting theories, which are not as well studied as ordinary QCD.
• In order to be able to have a consistent asymptotically free large n limit, we must limit ourselves to three cases: two-index representation (symmetric or anti-symmetric) and adjoint representation.