Physics – High Energy Physics – High Energy Physics - Theory

Scientific paper

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2003-02-12

JHEP 0307 (2003) 043

Physics

High Energy Physics

High Energy Physics - Theory

latex, 2 figures, 22 pages, v2: minor modifications, references added

Scientific paper

10.1088/1126-6708/2003/07/043

We study {\cal N}=2 SO(2N+1) SYM theory in the context of matrix model. By adding a superpotential of the scalar multiplet, W(\Phi), of degree 2N+2, we reduce the theory to {\cal N}=1. The 2N+1 distinct critical points of W(\Phi) allow us to choose a vacuum in such a way to break the gauge group to its maximal abelian subgroup. We compute the free energy of the corresponding matrix model in the planar limit and up to two vertices. This result is then used to work out the effective superpotential of {\cal N}=1 theory up to one-instanton correction. At the final step, by scaling the superpotential to zero, the effective U(1) couplings and the prepotential of the {\cal N}=2 theory are calculated which agree with the previous results.

**Abbaspur Reza**

Physics – High Energy Physics – High Energy Physics - Theory

Scientist

**Imaanpur Ali**

Physics – High Energy Physics – High Energy Physics - Theory

Scientist

**Parvizi Shahrokh**

Physics – High Energy Physics – High Energy Physics - Theory

Scientist

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