Stress-tensor OPE in N=2$$ \mathcal{N}=2 $$ superconformal theories

  title={Stress-tensor OPE in N=2\$\$ \mathcal\{N\}=2 \$\$ superconformal theories},
  author={Pedro Liendo and Israel Ram{\'i}rez and Jihye Seo},
  journal={Journal of High Energy Physics},
A bstractWe carry out a detailed superspace analysis of the OPE of two N=2$$ \mathcal{N}=2 $$ stress-tensor multiplets. Knowledge of the multiplets appearing in the expansion, together with the two-dimensional chiral algebra description of N=2$$ \mathcal{N}=2 $$ SCFTs, imply an analytic bound on the central charge c. This bound is valid for any N=2$$ \mathcal{N}=2 $$ SCFT regardless of its matter content and flavor symmetries, and is saturated by the simplest Argyres-Douglas fixed point. We… 

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