Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-11-22
JHEP 1101:101,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
17 pages, 3 figures, minor comments added, accepted for publication in JHEP
Scientific paper
10.1007/JHEP01(2011)101
Q-balls are a possible feature of any model with a conserved, global U(1) symmetry and no massless, charged scalars. It is shown that for a broad class of models of metastable supersymmetry breaking they are extremely influential on the vacuum lifetime and make seemingly viable vacua catastrophically short lived. A net charge asymmetry is not required as there is often a significant range of parameter space where statistical fluctuations alone are sufficient. This effect is examined for two supersymmetry breaking scenarios. It is found that models of minimal gauge mediation (which necessarily have a messenger number U(1)) undergo a rapid, supersymmetry restoring phase transition unless the messenger mass is greater than 10^8 GeV. Similarly the ISS model, in the context of direct mediation, quickly decays unless the perturbative superpotential coupling is greater than the Standard Model gauge couplings.
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