On a 5D UV completion of Argyres-Douglas theories

We discuss a novel UV completion of a class of Argyres-Douglas (AD) theories in the $\mathrm{\Omega }$-background by its embedding into the renormalisation group flow from five dimensional $\mathcal{N}=1$ superconformal field theories (SCFT) on $S^1$. This is obtained via analysing these theories in the light of ($q$-)Painlevé/gauge theory correspondence, which allows to compute the five dimensional BPS partition functions as an expansion in the Wilson loop vev with integer $q$-polynomials coefficients. These are derived formulating the gauge theory on a blown-up geometry and using a five-dimensional lift of (topological) operator/state correspondence. We discuss in detail the phase diagram of the four dimensional limits, pinpointing the special AD loci. Explicit computations are reported for ${\tilde{E}}_1$ SCFT and its limit to H${}_0=(A_1,A_2)$ AD theory.