On Chow quotients of torus actions
  We consider torus actions on Mori dream spaces and ask whether the associated Chow quotient is again a Mori dream space and, if so, what does its Cox ring look like. We provide general tools for the study of these problems and give solutions for k*-actions on smooth quadrics. 
Hendrik B\"aker, Juergen Hausen, Simon Keicher
math.AG