Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2004-05-17
Nucl.Phys.B704:445-474,2005
Physics
High Energy Physics
High Energy Physics - Theory
Additional comments and references are added, particularly, on the gauge dependence
Scientific paper
10.1016/j.nuclphysb.2004.10.010
We analyze the structure of multiloop supergraphs contributing to the effective Lagrangians in 4d supersymmetric gauge theories and in the models obtained from them by dimensional reduction. When d=4, this gives the renormalization of the effective charge. For d < 4, the low-energy effective Lagrangian describes the metric on the moduli space of classical vacua. These two problems turn out to be closely related. In particular, we establish the relationship between the 4d nonrenormalization theorems (in minimal and extended supersymmetric theories) and their low--dimensional counterparts.
Smilga Andrei
Vainshtein Arkady
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