Chen-Ruan Cohomology of cotangent orbifolds and Chas-Sullivan String   Topology
  In this paper we prove that for an almost complex orbifold, its virtual orbifold cohomology [math.AT/0606573] is isomorphic as algebras to the Chen-Ruan orbifold cohomology of its cotangent orbifold. 
Ana Gonz\'alez, Ernesto Lupercio, Carlos Segovia, Bernardo Uribe and   Miguel A. Xicot\'encatl