Are supersymmetric models with large tan(beta) natural ?

Details Are supersymmetric models with large tan(beta) natural ? Are supersymmetric models with large tan(beta) natural ?

2002-11-26

arxiv.org/abs/hep-ph/0211418v2

Phys.Lett. B561 (2003) 145-152

Physics

High Energy Physics

High Energy Physics - Phenomenology

Revtex, 12 pages, 2 eps figures

Scientific paper

10.1016/S0370-2693(03)00416-7

We point out that, contrary to general belief, generic supersymmetric models are not technically unnatural in the limit of very large values of the parameter tan(beta) when radiative corrections are properly included. Rather, an upper limit on tan(beta) only arises from the requirement that Yukawa couplings remain perturbative up to some high scale. We quantify the relation between this scale and the maximum value of tan(beta). Whereas tan(beta) is limited to lie below 50-70 in the mSUGRA model, models with a much lower scale of new physics (beyond supersymmetry) may have tan(beta) < 150-200.

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