Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1993-09-20
Nucl.Phys.B416:46-62,1994
Physics
High Energy Physics
High Energy Physics - Phenomenology
20 pages, UCSD/PTH 93-27, RU-93-42
Scientific paper
10.1016/0550-3213(94)90577-0
We point out a connection between R symmetry and \susy\ breaking. We show that the existence of an R symmetry is a necessary condition for \susy\ breaking and a spontaneously broken R symmetry is a sufficient condition provided two conditions are satisfied. These conditions are: {\it genericity}, \ie\ the effective Lagrangian is a generic Lagrangian consistent with the symmetries of the theory (no fine tuning), and {\it calculability}, \ie\ the low energy theory can be described by a supersymmetric Wess-Zumino effective Lagrangian without gauge fields. All known models of dynamical supersymmetry breaking possess such a spontaneously broken R symmetry and therefore contain a potentially troublesome axion. However, we use the fact that genericity is {\it not} a feature of supersymmetric theories, even when nonperturbative renormalization is included, to show that the R symmetry can in many cases be explicitly broken without restoring supersymmetry and so the axion can be given an acceptably large mass.
Nelson Ann E.
Seiberg Nathan
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