Symmetry Principles toward Solutions of $μ$ Problem

Details Symmetry Principles toward Solutions of $μ$ Problem Symmetry Principles toward Solutions of $μ$ Problem

1994-06-13

arxiv.org/abs/hep-ph/9406296v1

Mod.Phys.Lett.A9:3575-3584,1994

Physics

High Energy Physics

High Energy Physics - Phenomenology

Latex file, 13 pages

Scientific paper

10.1142/S0217732394003415

We stress that a natural solution of the $\mu$ problem requires two ingredients: a symmetry that would enforce $\mu = 0$ as well as the occurence of a small breaking parameter that generates a nonzero $\mu$. It is suggested that both the Peccei-Quinn symmetry and the spontaneously broken $R$ symmetry may be the sources of the needed $\mu$ term in the minimal supersymmetric standard model provided that they are spontaneously broken at a scale $10^{10}-10^{12}$ GeV. To solve the strong CP problem with a hidden sector confining group, both of these symmetries are needed in superstring models with an anomalous $U(1)_A$.

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