Daniel Krefl, Albert Schwarz
We study the relation between the partition function of refined SU(N) and SO(2N) Chern-Simons on the 3-sphere and the universal Chern-Simons partition function in the sense of Mkrtchyan and Veselov. For large N both refined Chern-Simons and universal Chern-Simons lead to a refined topological string on a conifold. The large N expansion for SU(N) explicitly shows the replacement of the virtual Euler characteristic of the moduli space of complex curves with a refined Euler characteristic related to the radius deformed c=1 string free energy.
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http://arxiv.org/abs/1304.7873
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