Soft-Supersymmetry Mass (Direct contact term)

Question

I found this term/operator in some papers that can generate masses, e.g Riva-Biggio-Pomarol(2012), Fox-Nelson-Weiner

$\int d^4\theta \frac{X^\dagger X}{M^2}Q^\dagger Q$

Could anyone explain about this term? Is there any references that explain this term?

This post imported from StackExchange Physics at 2014-12-30 13:58 (UTC), posted by SE-user Panuluh