TL;DR
This paper classifies semi-symmetric superspaces used in integrable string sigma-models related to AdS/CFT, focusing on those with zero beta function and central charge c<=26 at one loop.
Contribution
It provides a complete list of semi-symmetric cosets with desirable quantum properties for string theory applications.
Findings
Identified all semi-symmetric cosets with zero beta function.
Determined cosets with central charge c<=26 at one loop.
Contributed to understanding integrable backgrounds in AdS/CFT.
Abstract
Several string backgrounds which arise in the AdS/CFT correspondence are described by integrable sigma-models. Their target space is always a Z(4) supercoset (a semi-symmetric superspace). Here we list all semi-symmetric cosets which have zero beta function and central charge c<=26 at one loop in perturbation theory.
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