Upper bound on the $W_R$ mass in automatically R-conserving SUSY models

Abstract

We show that in automatically R-conserving minimal SUSY left-right symmetric models there is a theoretical upper limit on the mass of the right-handed $W_R$ boson given by $M_{W_R}\le g{M}_{SUSY}/f$, where $M_{SUSY}$ is the scale of supersymmetry breaking, g is the weak gauge coupling and $f$ is the Yukawa coupling responsible for generating the right-handed neutrino masses. If $M_{W_R}$ violates the above limit, the ground state of the theory breaks electromagnetism. The only way to avoid this bound while keeping the theory automatically R-conserving is to expand the theory to include very specific kinds of additional multiplets and demanding unnatural finetuning of their couplings.

plain latex; 8 pages

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