Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1995-12-22
Phys.Lett.B377:60-66,1996
Physics
High Energy Physics
High Energy Physics - Phenomenology
12 pages, uuencoded latex file + 4 ps figures
Scientific paper
10.1016/0370-2693(96)00313-9
It has been recently realized that within the Minimal Supersymmetric Standard Model, for certain patterns of superpartner masses, consistent with all the present experimental constraints, the scalar potential may develop at some scale $Q_0$ unbounded color/charge breaking directions involving the sfermion fields, and that these patterns are then excluded unless some new physics is invoked at or below the scale $Q_0$. We reanalyze this observation and point out that such patterns of superpartner masses at the weak scale are {\it not} ruled out when taking into account the probability of decay for the metastable color conserving minimum along these color breaking unbounded directions. It turns out that the color conserving minimum, although metastable, has a lifetime longer than the present age of the Universe and can survive both quantum tunneling and the effects of high temperatures in the early Universe, causing the color/charge breaking effects to be in practice not dangerous.
Riotto Antonio
Roulet Esteban
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