Found 1304 results, showing the newest relevant preprints. Sort by relevancy only.Update me on new preprints

Density perturbation in interacting holographic dark energy model

The present work deals with the evolution of the density contrasts for a cosmological model where along with the standard cold dark matter (CDM), the present Universe also contains holographic dark energy (HDE). Expand abstract.
7 days ago
4/10 relevant
arXiv

Two-component asymmetric dark matter via bound states and freeze-in decay

Assuming a particle-antiparticle asymmetry is initially shared by SM baryons and two dark matter components, we demonstrate that the existence of bound states among the heavy DM particles is able to transfer most of the asymmetry stored in the heavy component to the light one by late decay. Expand abstract.
7 days ago
10/10 relevant
arXiv

Signatures of Dark Matter in Cosmic-Ray Observations

For each case I will focus on various excesses reported in the literature which have been interpreted as possible hints of dark matter, and I will use them as examples to discuss theoretical aspects and analysis methodologies. Expand abstract.
8 days ago
10/10 relevant
arXiv

Primordial universe with the running cosmological constant

By using the handy model of Reduced Relativistic Gas for describing the Dark Matter, we consider the dynamics of both cosmic background and linear perturbations and evaluate the impact of the vacuum decay on the matter power spectrum and to the first CMB peak. Expand abstract.
8 days ago
4/10 relevant
arXiv

Marked correlation functions in perturbation theory

We develop perturbation theory approaches to model the marked correlation function constructed to up-weight low density regions of the Universe, which might help distinguish modified gravity models from the standard cosmology model based on general relativity. Expand abstract.
8 days ago
4/10 relevant
arXiv

Constraining the abundance of primordial black holes with gravitational lensing of gravitational waves at LIGO frequencies

Similarly, if a small percentage of the dark matter is in the form of microlenses with a few tens of solar masses, at sufficiently large magnification factors, all gravitational waves will show interference effects. Expand abstract.
9 days ago
7/10 relevant
arXiv

Axion Dark Matter, Proton Decay and Unification

We discuss the possibility to predict the QCD axion mass in the context of grand unified theories. Expand abstract.
9 days ago
7/10 relevant
arXiv

The Dark Matter Distributions in Low-Mass Disk Galaxies. II. The Inner Density Profiles

Dark matter-only simulations predict that dark matter halos have steep, cuspy inner density profiles, while observations of dwarf galaxies find a range of inner slopes that are often much shallower. Expand abstract.
9 days ago
10/10 relevant
arXiv

DANCE: Dark matter Axion search with riNg Cavity Experiment

We have proposed a new approach to search for axion dark matter with an optical ring cavity [Phys. Expand abstract.
11 days ago
10/10 relevant
arXiv

Improved limits on solar axions and bosonic dark matter from the CDEX-1B experiment using profile likelihood ratio method

We present improved constraints on couplings of solar axions and more generic bosonic dark matter particles using 737.1 kg-days of data from the CDEX-1B experiment. Expand abstract.
14 days ago
10/10 relevant
arXiv