TY - JOUR
T1 - Inflation with low reheat temperature and cosmological constraint on stable charged massive particles
AU - Kudo, Atsushi
AU - Yamaguchi, Masahiro
N1 - Funding Information:
We thank T. Moroi for delightful conversations. A.K. also thanks Sh. Matsumoto and F. Takayama for discussions and Y. Kiyo for assistance on numerical computation. This work was supported in part by the Grant-in-aid from the Ministry of Education, Culture, Sports, Science and Technology, Japan, priority area (#707) “Supersymmetry and unified theory of elementary particles”, and in part by the Grants-in-aid No. 11640246 and No. 12047201.
PY - 2001/9/6
Y1 - 2001/9/6
N2 - Abundance of stable charged massive particles (CHAMPs) is severely constrained by their searches inside sea water. We examine whether inflation with low reheat temperature can sufficiently dilute the abundance to evade this severe bound on CHAMPs, by taking into account their production and annihilation in a plasma during reheating phase. We argue that the abundance of the CHAMPs with mass less than 1 TeV will exceed the experimental bound, ruling out these CHAMPs, especially the possibility of the superpartner of tau lepton as the stable lightest superparticle. On the other hand, it is found that the CHAMP much heavier than 1 TeV can survive the bound, if the reheat temperature is low enough.
AB - Abundance of stable charged massive particles (CHAMPs) is severely constrained by their searches inside sea water. We examine whether inflation with low reheat temperature can sufficiently dilute the abundance to evade this severe bound on CHAMPs, by taking into account their production and annihilation in a plasma during reheating phase. We argue that the abundance of the CHAMPs with mass less than 1 TeV will exceed the experimental bound, ruling out these CHAMPs, especially the possibility of the superpartner of tau lepton as the stable lightest superparticle. On the other hand, it is found that the CHAMP much heavier than 1 TeV can survive the bound, if the reheat temperature is low enough.
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U2 - 10.1016/S0370-2693(01)00938-8
DO - 10.1016/S0370-2693(01)00938-8
M3 - Article
AN - SCOPUS:0042164675
VL - 516
SP - 151
EP - 155
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
SN - 0370-2693
IS - 1-2
ER -