TY - JOUR
T1 - A note on Polonyi problem
AU - Nakamura, Shuntaro
AU - Yamaguchi, Masahiro
N1 - Funding Information:
We would like to thank T. Higaki for useful discussions. The work was partially supported by the grants-in-aid from the Ministry of Education, Science, Sports, and Culture of Japan, Nos. 16081202 and 17340062.
PY - 2007/11/1
Y1 - 2007/11/1
N2 - We reinvestigate the cosmological Polonyi problem in the case where the Polonyi mass is O (10) TeV or larger. Such a large supersymmetry breaking scale implies that the Polonyi field should be sequestered from the Standard Model sector. Since the Polonyi field does not have a coupling to the gauge multiplets at tree level, in order to obtain sufficiently high reheating temperature compatible with the standard big-bang nucleosynthesis the Polonyi mass well exceeds 100-1000 TeV, depending on the decay channels. Moreover, we find that the branching ratio of the Polonyi field into neutralinos is of order unity, and thus the resulting neutralino LSPs, if stable, overclose the Universe even for the case of the wino-like LSP. Our explicit computation given here exhibits a very serious cosmological difficulty for models where supersymmetry breaking is caused by the Polonyi-type field.
AB - We reinvestigate the cosmological Polonyi problem in the case where the Polonyi mass is O (10) TeV or larger. Such a large supersymmetry breaking scale implies that the Polonyi field should be sequestered from the Standard Model sector. Since the Polonyi field does not have a coupling to the gauge multiplets at tree level, in order to obtain sufficiently high reheating temperature compatible with the standard big-bang nucleosynthesis the Polonyi mass well exceeds 100-1000 TeV, depending on the decay channels. Moreover, we find that the branching ratio of the Polonyi field into neutralinos is of order unity, and thus the resulting neutralino LSPs, if stable, overclose the Universe even for the case of the wino-like LSP. Our explicit computation given here exhibits a very serious cosmological difficulty for models where supersymmetry breaking is caused by the Polonyi-type field.
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U2 - 10.1016/j.physletb.2007.09.001
DO - 10.1016/j.physletb.2007.09.001
M3 - Article
AN - SCOPUS:35349024339
SN - 0370-2693
VL - 655
SP - 167
EP - 171
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
IS - 3-4
ER -