19 citations · 47 across the 7 of their papers we have counts for
7 papers
Stable dark matter from Pauli blocking in the degenerate fermion background with Quantum Field Theory
Wonsub Cho, Ki-Young Choi, Junghoon Joh +1
We study a mechanism to make dark matter stable based on the Pauli blocking in the fermion background. In the background where fermions occupy the states, the decay of dark matter…
Light cold dark matter from non-thermal decay
Ki-Young Choi, Jinn-Ouk Gong, Junghoon Joh +2
We investigate the mass range and the corresponding free-streaming length scale of dark matter produced non-thermally from decay of heavy objects which can be either dominant or su…
Cored Dark Matter halos in the Cosmic Neutrino Background
Wonsub Cho, Ki-Young Choi, Hee Jung Kim
We study the impact of the interaction between DM and the cosmic neutrino background on the evolution of galactic dark matter halos. The energy transfer from the neutrinos to the d…
Sterile neutrino dark matter with dipole interaction
Wonsub Cho, Ki-Young Choi, Osamu Seto
We consider the possibility of the lightest sterile neutrino dark matter which has dipole interaction with heavier sterile neutrinos. The lifetime can be long enough to be a dark m…
Primordial perturbations from dilaton-induced gauge fields
Kiwoon Choi, Ki-Young Choi, Hyungjin Kim +1
We study the primordial scalar and tensor perturbations in inflation scenario involving a spectator dilaton field. In our setup, the rolling spectator dilaton causes a tachyonic in…
Quasar polarization with two axionlike particles
Ki-Young Choi, Subhayan Mandal, Chang Sub Shin
Recently, it was shown, that the absence of circular polarization of visible light from quasars, severely constrains the interpretation of axion like particles (ALPs) as a solution…
Higgsino mass matrix ansatz for MSSM
Kang-Sin Choi, Ki-Young Choi, Kyuwan Hwang +1
An ansatz, Det. for the Higgsino mass matrix in string orbifold trinification is suggested toward the minimal supersymmetric standard model(MSSM). Small instanton…