MSSM curvaton in the gauge-mediated SUSY breaking |
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| Affiliation: | 1. Helsinki Institute of Physics, PO Box 64, FIN-00014, University of Helsinki, Finland;2. Research Center for the Early Universe, University of Tokyo, Tokyo 113-0033, Japan;1. Institute for Cosmic Ray Research, University of Tokyo, Kashiwa 277-8582, Japan;2. Institute for the Physics and Mathematics of the Universe, University of Tokyo, Kashiwa 277-8568, Japan;1. Department of Physics, University of Tokyo, Tokyo 113-0033, Japan;2. Department of Physics, Tohoku University, Sendai 980-8578, Japan;3. Institute for the Physics and Mathematics of the Universe, University of Tokyo, Chiba 277-8568, Japan;1. Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan;2. Institute for the Physics and Mathematics of the Universe, University of Tokyo, Kashiwa 277-8568, Japan;1. Department of Mathematics and Physics, Kanagawa University, Kanagawa 259-1293, Japan;2. Max-Planck-Institut für Kernphysik, PO Box 103980, 69029 Heidelberg, Germany;3. Institute for Cosmic Ray Research, the University of Tokyo, Chiba 277-8582, Japan;4. Kavli Institute for the Physics and Mathematics of the Universe (WPI), Todai Institutes for Advanced Study, the University of Tokyo, Chiba 277-8582, Japan;1. Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan;2. Theoretische Natuurkunde and IIHE/ELEM, Vrije Universiteit Brussel, and International Solvay Institutes, Pleinlaan 2, B-1050 Brussels, Belgium;3. Department of Physics, King''s College London, London WC2R 2LS, UK;1. Academic Support Center, Kogakuin University, Hachioji 192-0015, Japan;2. Department of Physics, Tohoku University, Sendai 980-8578, Japan |
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| Abstract: | We study the curvaton scenario using the MSSM flat directions in the gauge-mediated SUSY breaking model. We find that the fluctuations in the both radial and phase directions can be responsible for the density perturbations in the universe through the curvaton mechanism. Although it has been considered difficult to have a successful curvaton scenario with the use of those flat directions, it is overcome by taking account of the finite temperature effects, which induce a negative thermal logarithmic term in the effective potential of the flat direction. |
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