arXiv subjects

A. De Giovanni

Publications and source records attributed to A. De Giovanni.

2 recordsLinked to original sources

arXiv1999

$(α')^4$ corrections to the N=2 supersymmetric Born-Infeld action

We consider the N=2 supersymmetric Born-Infeld action and compute one-loop divergences quantizing the theory in N=1 superspace. We find that in the presence of non constant curvature the theory is not renormalizable. The structure of the $(α')^4$ counterterm, proportional to derivatives of the curvature, is consistent with effective action calculations from superstring theory.

hep-th↗

arXiv1997

The N=2 Super Yang-Mills Low-Energy Effective Action at Two Loops

We have carried out a two loop computation of the low-energy effective action for the four-dimensional N=2 supersymmetric Yang-Mills system coupled to hypermultiplets, with the chiral superfields of the vector multiplet lying in an abelian subalgebra. We have found a complete cancellation at the level of the integrands of Feynman amplitudes, and therefore the two loop contribution to the action, effective or Wilson, is identically zero.

hep-th↗