paper

Mayer expansion of the Nekrasov pre potential: the subleading -order

arXiv:1511.02672 · doi:10.1016/j.nuclphysb.2016.03.017

Abstract

The Mayer cluster expansion technique is applied to the Nekrasov instanton partition function of super Yang-Mills. The subleading small -correction to the Nekrasov-Shatashvili limiting value of the prepotential is determined by a detailed analysis of all the one-loop diagrams. Indeed, several types of contributions can be distinguished according to their origin: long range interaction or potential expansion, clusters self-energy, internal structure, one-loop cyclic diagrams, etc.. The field theory result derived more efficiently in [1], under some minor technical assumptions, receives here definite confirmation thanks to several remarkable cancellations: in this way, we may infer the validity of these assumptions for further computations in the field theoretical approach.

29 pages, 9 figures

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