Novel mechanism of high-$p_T$ production from an opaque quark-gluon   plasma
  We find that in an opaque quark-gluon plasma, significant particle production at high transverse momenta can occur via acceleration of (initially) lower-momentum partons. This new mechanism, which is the opposite of parton energy loss (jet quenching), has important implications for observables, such as elliptic flow, in heavy-ion collisions at RHIC energies and above. 
Denes Molnar (Ohio State Univ.)