$SU(2)_{\ell}\times SU(2)_r\times SO(2)\simeq SO(4)\times SO(2) \subset SO(6)$.

Similarly as in the $\cN=4$ theory, one can calculate the cubic and linear ’t Hooft anomalies for $U(1)_R$: $$\mathop\text{tr}R^3_{\rm LS} = d_{G} [1^3-2(1/2)^3] = \frac{3}{4}d_G\;, \qquad \mathop\text{tr}R_{\rm LS} = d_{G} [1-2(1/2)] = 0\;,$$ and find that the central charges of the LS fixed point are $$\label{ccLS}
a_{\rm LS} = c_{\rm LS} = \frac{27}{128}d_{G}\;.$$ This yields the familiar result (see [@Freedman:1999gp; @Tachikawa:2009tt]) $$\label{ccLS2}
\frac{a_{\rm LS}}{a_{\mathcal{N}=4}} = \frac{c_{\rm LS}}{c_{\mathcal{N}=4}}= \frac{27}{32}\;.$$

${(0,2)}$ SCFTs from the LS fixed point {#subsec:LSFT}
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One way to preserve some supersymmetry when a supersymmetric QFT is put on a curved manifold is to embed the structure group of the manifold into the $R$-symmetry of the QFT [@Witten:1988ze]. In other words, one has to turn on an $R$-symmetry background gauge field which cancels the spin-connection of the curved manifold. If the supersymmetric QFT at hand has additional flavor symmetry, one is also free to turn on a background gauge field for this flavor symmetry without any additional breaking of supersymmetry.

To construct the two-dimensional SCFTs of interest, we place the four-dimensional supersymmetric LS theory on $\mathbb{R}^{1,1}\times \Sigma_{\frak{g}}$ and perform a partial topological twist by turning on a background flux for the global 