Zobrazeno 1 - 10
of 115
pro vyhledávání: '"Chang, Jae Hyeok"'
Autor:
Agashe, Kaustubh, Buen-Abad, Manuel, Chang, Jae Hyeok, Clark, Steven J., Dutta, Bhaskar, Tsai, Yuhsin, Xu, Tao
We consider the possibility of indirect detection of dark sector processes by investigating a novel form of interaction between ambient dark matter (DM) and primordial black holes (PBHs). The basic scenario we envisage is that the ambient DM is ``dor
Externí odkaz:
http://arxiv.org/abs/2409.13811
The QCD axion and axion-like particles, as leading dark matter candidates, can also have interesting implications for dark matter substructures if the Peccei-Quinn symmetry is broken after inflation. In such a scenario, axion perturbations on small s
Externí odkaz:
http://arxiv.org/abs/2406.09499
We propose a novel baryogenesis scenario where the baryon asymmetry originates directly from a hierarchy between two fundamental mass scales: the electroweak scale $v$ and the Planck scale $M_P$, in the form of \begin{equation} Y_B \sim \sqrt{\frac{v
Externí odkaz:
http://arxiv.org/abs/2401.13734
We initiate a study of the gravitational-wave signatures of a phase transition that occurs as the Universe's temperature increases during reheating. The gravitational-wave signatures of such a heating phase transition are different from those of a co
Externí odkaz:
http://arxiv.org/abs/2305.09712
Recent studies reveal that more than a dozen of white dwarfs displaying near-perfect blackbody spectra in the optical range have been lurking in the Sloan Digital Sky Survey catalog. We point out that, in a way analogous to the Cosmic Microwave Backg
Externí odkaz:
http://arxiv.org/abs/2305.03749
Dark radiation (DR) is generally predicted in new physics scenarios that address fundamental puzzles of the Standard Model or tensions in the cosmological data. Cosmological data has the sensitivity to constrain not only the energy density of DR, but
Externí odkaz:
http://arxiv.org/abs/2212.13264
Future gamma-ray experiments, such as the e-ASTROGAM and AMEGO telescopes, can detect the Hawking radiation of photons from primordial black holes (PBHs) if they make up a fraction or all of dark matter. PBHs can analogously also Hawking radiate new
Externí odkaz:
http://arxiv.org/abs/2212.11980
Finite temperature effects in the Standard Model tend to restore the electroweak symmetry in the early universe, but new fields coupled to the higgs field may as well reverse this tendency, leading to the so-called electroweak symmetry non-restoratio
Externí odkaz:
http://arxiv.org/abs/2210.05680
Autor:
Chang, Jae Hyeok, Kaplan, David E., Rajendran, Surjeet, Ramani, Harikrishnan, Tanin, Erwin H.
We study the solar emission of light dark sector particles that self-interact strongly enough to self-thermalize. The resulting outflow behaves like a fluid which accelerates under its own thermal pressure to highly relativistic bulk velocities in th
Externí odkaz:
http://arxiv.org/abs/2205.11527
Asteroid-mass primordial black holes (PBH) can explain the observed dark matter abundance while being consistent with the current indirect detection constraints. These PBH can produce gamma-ray signals from Hawking radiation that are within the sensi
Externí odkaz:
http://arxiv.org/abs/2202.04653