Hermitian-Einstein connections on polystable orthogonal and symplectic   parabolic Higgs bundles
  Let X be a smooth complex projective curve and S a finite subset of X. We show that an orthogonal or symplectic parabolic Higgs bundle on X with parabolic structure over S admits a Hermitian-Einstein connection if and only if it is polystable. 
Indranil Biswas and Matthias Stemmler
math.DG math.AG