Phase Transitions in Softly Broken N=2 SQCD at Non-zero Theta Angle

Details Phase Transitions in Softly Broken N=2 SQCD at Non-zero Theta Angle Phase Transitions in Softly Broken N=2 SQCD at Non-zero Theta Angle

1996-08-20

arxiv.org/abs/hep-th/9608135v1

Nucl.Phys. B484 (1997) 124-140

Physics

High Energy Physics

High Energy Physics - Theory

18 pages, LaTeX, 10 epsf figures

Scientific paper

10.1016/S0550-3213(96)00595-0

We investigate the behavior of softly broken $N=2$ SQCD at non-zero bare theta angle $\theta_0$, using superfield spurions to implement the SUSY breaking. We find a first-order phase transition as $\theta_0$ is varied from zero to $2 \pi$, in agreement with a prediction of `t Hooft. The low-energy theta angle $\theta_{eff}$, which determines the effective charges of dyonic excitations, has a complicated dependence on $\theta_0$ and breaking parameters.

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