Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1997-11-08
Phys.Lett. B423 (1998) 305-310
Physics
High Energy Physics
High Energy Physics - Phenomenology
10 pages, uses REVTEX macro, revised manuscript to appear in Phys. Lett. B
Scientific paper
10.1016/S0370-2693(98)00138-5
We present a simple model of gauge mediated supersymmetry breaking with composite messenger fields. Our model is based on the gauge group $Sp(8) \times SU(2)$. By the strong Sp(8) dynamics, supersymmetry is dynamically broken and the composite fields with charges under the standard model gauge group appear at low energy. The $U(1)_R$ symmetry breaking mass terms for the composite fields are generated by the strong SU(2) dynamics. Then, the composite fields play a role of the messenger fields. On the other hand, the theoretical bounds on the parameters in our model are discussed. Especially, the lower bound on the dynamical scale of the $Sp(8) \times SU(2)$ gauge interaction is roughly $10^{15}$ GeV.
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