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Analysis of Leptogenesis in Supersymmetric Triplet Seesaw Model
E. J. Chun, S. Scopel
We analyze leptogenesis in a supersymmetric triplet seesaw scenario that explains the observed neutrino masses, adopting a phenomenological approach where the decay branching ratio…
Axino Light Dark Matter and Neutrino Masses with R-parity Violation
Eung Jin Chun, Hang Bae Kim
Motivated by the recent observation of the 511 keV -ray line emissions from the galactic bulge and an explanation for it by the decays of light dark matter particles, we conside…
Cosmological Aspects of the D-brane World
Inyong Cho, Eung Jin Chun, Hang Bae Kim +1
The D-brane world is an idea that we are living on the D-brane imbedded in a 10- or 11-dimensional spacetime of string theories, aiming at the construction of realistic models from…
String Cosmology of the D-brane Universe
Inyong Cho, Eung Jin Chun, Hang Bae Kim +1
We analyze homogeneous anisotropic cosmology driven by the dilaton and the self-interacting ``massive'' antisymmetric tensor field which are indispensable bosonic degrees with the…
Cosmological implication of antisymmetric tensor field on D-brane
Inyong Cho, Eung Jin Chun, Hang Bae Kim +1
We discuss the cosmological implications of an antisymmetric tensor field when it experiences a kind of ``Higgs mechanism,'' including nonlocal interaction terms, on D-branes. Even…