The moduli space of non-Abelian vortices in Yang-Mills-Chern-Simons-Higgs theory

We determine the dimension of the moduli space of non-Abelian vortices in Yang-Mills-Chern-Simons-Higgs theory in 2+1 dimensions for gauge groups $G=(\mathrm{U}(1)\times G^{\mathrm{\prime }})\mathrm{/}{\mathbb{Z}}_{n_0}$ with $G^{\mathrm{\prime }}$ being an arbitrary semi-simple group and $n_0$ the greatest common divisor of the Abelian charges of the $G^{\mathrm{\prime }}$ invariants. The calculation is carried out using a Callias-type index theorem, the moduli matrix approach and a D-brane setup in Type IIB string theory. We prove that the index theorem gives the number of zeromodes or moduli of the non-Abelian vortices, extend the moduli matrix approach to the Yang-Mills-Chern-Simons-Higgs theory and finally derive the effective Lagrangian of Collie and Tong using string theory.