Superspace Higher Derivative Terms in Two Dimensions

Understand

We study $(2,2)$ and $(4,4)$ supersymmetric theories with superspace higher derivatives in two dimensions.

• A characteristic feature of these models is that they have several different vacua, some of which break supersymmetry.
• Depending on the vacuum, the equations of motion describe different propagating degrees of freedom.
• Various examples are presented which illustrate their generic properties.