Abstract
Irregular conformal block is motivated by the Argyres-Douglas type of N=2 super conformal gauge theory. We investigate the classical/NS limit of irregular conformal block using the spectral curve on a Riemann surface with irregular punctures, which is equivalent to the loop equation of irregular matrix model. The spectral curve is reduced to the second order (Virasoro symmetry, SU(2) for the gauge theory) and third order (W 3 symmetry, SU(3)) differential equations of a polynomial with finite degree. The conformal and W symmetry generate the flow equations in the spectral curve and determine the irregular conformal block, hence the partition function of the Argyres-Douglas theory ala AGT conjecture.
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Choi, S.K., Rim, C. & Zhang, H. Irregular conformal block, spectral curve and flow equations. J. High Energ. Phys. 2016, 118 (2016). https://doi.org/10.1007/JHEP03(2016)118
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DOI: https://doi.org/10.1007/JHEP03(2016)118