Third virial coefficient for 4-arm and 6-arm star polymers
  We discuss the computation of the third virial coefficient in polymer systems, focusing on an additional contribution absent in the case of monoatomic fluids. We determine the interpenetration ratio and several quantities that involve the third virial coefficient for star polymers with 4 and 6 arms in the good-solvent regime, in the limit of a large degree of polymerization. 
Sergio Caracciolo, Bortolo Matteo Mognetti, Andrea Pelissetto