Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2010-12-16
Phys.Rev.D83:105024,2011
Physics
High Energy Physics
High Energy Physics - Theory
29 pages, 12 figures; Added a reference & modified introduction in v2
Scientific paper
10.1103/PhysRevD.83.105024
We (re)derive the propagators and Feynman rules for the massless scalar and vector multiplets in N=2 Projective Superspace ('Projective Hyperspace'). With these, we are able to calculate both the divergent and finite parts of 2, 3 & 4-point functions at 1-loop for N=2 Super-Yang-Mills theory (SYM) explicitly in Projective Hyperspace itself. We find that effectively only the coupling constant needs to be renormalized unlike in the N=1 case where an independent wavefunction renormalization is also required. This feature is similar to that of the background field gauge, even though we are using ordinary Fermi-Feynman gauge. The computation of 1-hoop beta-function is then straightforward and matches with the known result. We also show that it receives no 2-hoops contributions. All these calculations provide an alternative proof of the finiteness of N=4 SYM.
Jain Dharmesh
Siegel Warren
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