Author:
Jeong Kwang Sik,Park Wan-il
Abstract
Abstract
We propose a minimal gauged U(1)
B-L
extension of the minimal supersymmetric Standard
Model (MSSM) which resolves the cosmological moduli problem via thermal inflation, and realizes
late-time Affleck-Dine leptogensis so as to generate the right amount of baryon asymmetry at the
end of thermal inflation. The present relic density of dark matter can be explained by
sneutrinos, MSSM neutralinos, axinos, or axions. Cosmic strings from U(1)
B-L
breaking are
very thick, and so the expected stochastic gravitational wave background from cosmic string loops
has a spectrum different from the one in the conventional Abelian-Higgs model, as would be
distinguishable at least at LISA and DECIGO. The characteristic spectrum is due to a flat
potential, and may be regarded as a hint of supersymmetry. Combined with the resolution of moduli
problem, the expected signal of gravitational waves constrains the U(1)
B-L
breaking scale to
be 𝒪(1012–13) GeV. Interestingly, our model provides a natural possibility
for explaining the observed ultra-high-energy cosmic rays thanks to the fact that the core width
of strings in our scenario is very large, allowing a large enhancement of particle emissions from
the cusps of string loops. Condensation of LHu
flat-direction inside of string cores arises
inevitably and can also be the main source of the ultra-high-energy cosmic rays accompanied by
ultra-high-energy lightest supersymmetric particles.
Subject
Astronomy and Astrophysics
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献