In this note we address the question whether one can recover from the vertex operator algebra associated with a four-dimensional N = 2 superconformal field theory the deformation quantization of the Higgs branch of vacua that appears as a protected subsector in the three-dimensional circle-reduced theory. We answer this question positively if the UV R-symmetries do not mix with accidental (topological) symmetries along the renormalization group flow from the four-dimensional theory on a circle

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... o the threedimensional theory. If they do mix, we still find a deformation quantization but at different values of its period. 1 This SCFT/VOA correspondence has resulted in a large number of interesting results. For example, many SCFT/VOA pairs have been identified in, e.g., [2] [3] [4] [5] [6] [7] [8] , and, more remarkably, the correspondence has inspired the construction of novel vertex operator algebras [9] [10] [11] [12] [13] . It has also served as a useful tool to acquire new insights in SCFTs and VOAs, see for example [14] [15] [16] [17] [18] [19] [20] [21] [22] [23] [24] [25] [26] [27] [28] [29] [30] [31] [32] . 2 Also six-dimensional N = (2, 0) SCFTs participate in a truncation to vertex operator algebras [33] . 3 A similar construction exists for the Coulomb branch of vacua.