Cosmological Constraint on the String Dilaton in Gauge-Mediated Supersymmetry Breaking Theories
Cosmological Constraint on the String Dilaton in Gauge-Mediated Supersymmetry Breaking Theories
The dilaton field in string theories (if it exists) is expected to have a mass of the order of the gravitino mass ${m}_{3/2}$ which is in a range of ${10}^{\ensuremath{-}2}\mathrm{keV}--1\mathrm{GeV}$ in gauge-mediated supersymmetry breaking models. If this is the case, the cosmic energy density of coherent dilaton oscillation easily exceeds …