Light singlet particles and their cosmological consequences in witten-type supersymmetric models |
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Authors: | Mahiko Suzuki |
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Institution: | Lawrence Berkeley Laboratory, University of California, Berkeley, CA 94720, USA;Department of Physics and Lawrence Berkeley Laboratory, University of California, Berkeley, CA 94720, USA |
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Abstract: | In a class of supersymmetric gauge models which generate a large mass scale from a supersymmetry breaking mass scale M through loop corrections, there exists generally a very light scalar particle which transforms like a singlet under SU(3)c × SU(2)L with no U(1) charge. Cosmological constraints on such a particle are so severe that an upper bound is set on possible values of supersymmetry breaking scale in this class of models as M ? 500 TeV provided that the large mass scale is 1015 GeV and the mass of the light scalar particle is generated in one-loop order. This bound holds even if the goldstino is not absorbed into the gravitino. |
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