On N = 2 low energy effective actions

We propose a Wilsonian action compatible with special geometry and higher dimension N = 2 corrections, and show that the holomorphic contribution F to the low energy effective action is independent of the infrared cutoff. We further show that for asymptotically free SU(2) super Yang-Mills theories, the infrared cutoff can be tuned to cancel leading corrections to F. We also classify all local higher-dimensional contributions to the N = 2 superspace effective action that produce corrections to the Kähler potential when reduced to N = 1 superspace.