Zobrazeno 1 - 10
of 1 027
pro vyhledávání: '"Choi, Ki Young"'
We propose a novel and comprehensive particle physics framework that addresses multiple cosmological tensions observed in recent measurements of the Hubble parameter, $S_8$, and Lyman-$\alpha$ forest data. Our model, termed `{\bf SIDR+$\boldsymbol{z_
Externí odkaz:
http://arxiv.org/abs/2408.03004
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 to those final states is not allowed, as a result, DM becomes stable.
Externí odkaz:
http://arxiv.org/abs/2407.08229
Publikováno v:
JCAP 07(2024)064
In this article, we investigate the stochastic gravitational waves (GWs) spectrum, resulting from the emission of gravitons through bremsstrahlung, in the decay of particles produced by Hawking radiation. Although particle decays inevitably entail th
Externí odkaz:
http://arxiv.org/abs/2403.15269
Autor:
Choi, Ki-Young, Kim, Sung Hyun, Kim, Yeong Gyun, Lee, Kang Young, Lee, Kyong Sei, Park, Byung Do, Sohn, Jong Yoon, Yoo, Seong Moon, Yoon, Chun Sil
Publikováno v:
J. High Energ. Phys. 2024, 166 (2024)
We study the expected sensitivity to the mixing between sterile and tau neutrinos directly from the tau neutrino disappearance in the high-energy fixed target experiment. Here, the beam energy is large enough to produce tau neutrinos at the target wi
Externí odkaz:
http://arxiv.org/abs/2403.04191
Publikováno v:
JCAP02(2024)020
We consider the possibility that the weakly interacting massive particles produced from the evaporation of primordial black hole can explain both the relic density of dark matter and the baryon asymmetry of the Universe, through their annihilation wh
Externí odkaz:
http://arxiv.org/abs/2309.16122
Autor:
Panda, Chandan Kumar, Lee, Hong Gu, Park, Hwiwoo, Jung, Soon-Gil, Choi, Ki-Young, Hwang, Jungseek
Publikováno v:
Results in Physics 50, 106572 (2023)
We investigated a single crystal BaFe(2-x)CoxAs2 (Co-doped BaFe2As2: Co-doped Ba122) with x = 0.20 using infrared spectroscopy. We obtained the bosonic spectrum from the measured spectrum using an extended Drude-Lorentz model for the normal state and
Externí odkaz:
http://arxiv.org/abs/2308.05325
Publikováno v:
Physics Letters B, Volume 845, 2023, 138126
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 sub-dominant at the moment of decay. We show that the resulting dark mat
Externí odkaz:
http://arxiv.org/abs/2304.07462
Publikováno v:
JCAP06(2023)021
We study the prospect to detect the cosmic background of sterile neutrinos in the Tritium $\beta$-decay, such as PTOLEMY-like experiments. The sterile neutrino with mass between 1 eV - 10 keV may contribute to the local density as warm or cold DM com
Externí odkaz:
http://arxiv.org/abs/2212.14192
Autor:
Lee, Youjin, Son, Suhan, Kim, Chaebin, Kang, Soonmin, Shen, Junying, Kenzelmann, Michel, Delley, Bernard, Savchenko, Tatiana, Parchenko, Sergii, Na, Woongki, Choi, Ki-Young, Kim, Wondong, Cheong, Hyeonsik, Derlet, Peter M., Kleibert, Armin, Park, Je-Geun
Van der Waals (vdW) magnets are an ideal platform for tailoring two-dimensional (2D) magnetism with immense potential for spintronics applications and are intensively investigated. However, little is known about the microscopic origin of magnetic ord
Externí odkaz:
http://arxiv.org/abs/2211.05381
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 dark matter can heat the center of the galaxy and make it cored. This e
Externí odkaz:
http://arxiv.org/abs/2204.01431