Supersymmetric deformations of F1-NS5-branes and their exact CFT description

Understand

We consider certain classes of operators in the exact conformal field theory SL(2,R) x SU(2) x U(1)^4 describing strings in an AdS(3) x S(3) x T4 geometry supported by Neveu--Schwarz 3-form fluxes.

• This background arises in the near-horizon limit of a system of NS5-branes wrapped on a 4-torus and F1-branes smeared on the 4-torus when both types of branes are located at the same point in their common transverse space.
• We find a class of operators that lead to spacetime supersymmetric deformations.
• It is remarkable that most of these operators are not chiral primary with respect to the N=2 superconformal algebra on the wordsheet.