Gauged R-symmetry, Fermion and Higgs Mass Problem

Details Gauged R-symmetry, Fermion and Higgs Mass Problem Gauged R-symmetry, Fermion and Higgs Mass Problem

1995-08-17

arxiv.org/abs/hep-ph/9508320v2

Phys.Lett. B367 (1996) 226-228

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, Latex, no figures

Scientific paper

We consider the simplest model of $SU(3) \times SU(2) \times U(1)_Y \times U(1)_R$ gauge symmetry with one extra singlet field whose vacuum expectation value breaks the horizontal $R$-symmetry $U(1)_R$ and gives rise to Yukawa textures. The $U(1)_R$ symmetry is able to provide both acceptable fermion mass hierarchies and a natural solution to the $\mu$ problem only if its mixed anomalies are cancelled by the Green-Schwarz mechanism. When the canonical normalization $g_3^2=g_2^2={5\over3}g_1^2$ of the gauge coupling constants is assumed, the Higgs mass parameter $\mu \sim m_{3/2}$ can arise taking into acount the uncertainty in the ultraviolet relation $m_e m_\mu m_\tau/m_d m_s m_b \simeq \lambda^q$ with $q \neq 0$. When $q=0$ is taken only a suppressed value of $\mu \sim \lambda m_{3/2}$ can be obtained.

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