Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-04-14
JHEP 1007:085,2010
Physics
High Energy Physics
High Energy Physics - Phenomenology
20 pages, 1 figure; added footnotes and references for section 1 and 2, a footnote replaced with a new paragraph in section 2
Scientific paper
10.1007/JHEP07(2010)085
We propose a simple extension of the minimal supersymmetric standard model by introducing a gauge singlet in addition to right-handed neutrinos. The model resolves the strong CP problem by Pecci-Quinn symmetry, explains the origin of left-handed neutrino masses as well as MSSM $\mu$-parameter. It also gives rise to thermal inflation, baryogenesis and dark matter in a remarkably consistent way. Interestingly, resolution of moduli problem by thermal inflation constrains tightly axion coupling constant and flaton decay temperature to be $f_a \sim 10^{12} \GeV$ and $T_\mathrm{d} \sim 100 \MeV$, respectively. Model parameters in this case are likely to give right amount of baryon asymmetry and dark matter at present. The main component of dark matter is expected to be the axino whose mass is nearly fixed to be about $1 \GeV$.
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