Radiative Symmetry Breaking in a Supersymmetric Model with an Extra $U(1)$

Details Radiative Symmetry Breaking in a Supersymmetric Model with an Extra $U(1)$ Radiative Symmetry Breaking in a Supersymmetric Model with an Extra $U(1)$

1994-11-08

arxiv.org/abs/hep-ph/9411239v2

Int.J.Mod.Phys.A10:4521-4536,1995

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTeX, 20 pages + 5 figures attached as uuencoded tar-compressed

Scientific paper

10.1142/S0217751X95002096

Radiative symmetry breaking is studied in a superstring-inspired supersymmetric model which is extended with a low energy extra $U(1)$ symmetry. In this model the $\mu$-problem is radiatively solved in an automatic way. The right-handed neutrino can be heavy and the seesaw mechanism will produce the small neutrino mass which makes the MSW solution applicable to the solar neutrino problem. We search a parameter region which has the favorable feature for the radiative symmetry breaking at the weak scale. Rather wide parameter region is found to be allowed. The upper bound of the extra $Z$ boson mass is estimated as $M_{Z_2} \le 2000$~GeV for a top mass range $ 150~{\rm GeV} \le m_t \le 190~{\rm GeV}$. Some phenomenological features of the extra $Z$ boson are also presented.

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