Article
Astronomy & Astrophysics
Joao G. Rosa, Duarte M. C. Silva
Summary: This article proposes a scenario that explains the comparable abundances of dark matter and baryons without requiring coincidence in particle masses. The scenario suggests that dark matter corresponds to heavy dark baryons in a hidden sector, and the asymmetry in baryon production compensates for the differences in mass to give similar densities in both sectors. The scenario also predicts uncorrelated fluctuations in dark matter and baryon densities.
Editorial Material
Multidisciplinary Sciences
Igor G. Irastorza
Summary: Axions, hypothetical particles that could make up dark matter, could have their detection sensitivity improved by quantum manipulation technology.
Article
Astronomy & Astrophysics
Alexander V. Balatsky, Benjo Fraser, Henrik S. Roising
Summary: This article discusses the axion dark matter condensate and the effects of dark matter interactions on the spectrum of collective modes. It is found that DM self-interactions change the dispersion spectrum from quadratic to linear-like, with the velocity determined by the interactions but dominated by gravity. Additionally, a sound-like mode called dark sound (DS) is identified, which describes stable density oscillations at intermediate length scales.
Article
Physics, Multidisciplinary
Miha Nemevsek, Yue Zhang
Summary: Entropy production is crucial in addressing the overpopulation of thermal relics, widely employed in particle physics models for explaining the origin of dark matter. The partial decay of a long-lived particle, dominating the universe, to dark matter has an impact on the primordial matter power spectrum. We derive a stringent limit on the branching ratio of the dilutor to dark matter from large scale structure observation using sloan digital sky survey data, offering a novel tool for testing models with a dark matter dilution mechanism. We apply it to the left-right symmetric model and firmly exclude a large portion of parameter space for right-handed neutrino warm dark matter.
PHYSICAL REVIEW LETTERS
(2023)
Article
Astronomy & Astrophysics
Yonit Hochberg, Eric David Kramer, Noah Kurinsky, Benjamin Lehmann
Summary: Superconducting detectors are proposed as excellent targets for the direct detection of light dark matter scattering with masses as low as a few keV. By studying the angular distribution of excitations produced in isotropic superconducting targets, we find that dark matter scattering generates an initial anisotropic excitation distribution, which can be preserved during the relaxation process. Our findings suggest that directional detection is feasible for a wide range of dark matter masses, opening up the possibility of discovering light dark matter with bulk superconducting targets.
Article
Astronomy & Astrophysics
Wei Cheng, Ligong Bian, Yu-Feng Zhou
Summary: In this paper, a generalized natural inflation model is proposed to study axionlike particle inflation and dark matter. With two additional parameters, the model can achieve small-field inflation and the axionlike particle inflaton can serve as a dark matter candidate in certain parameter spaces. This model considers cosmic microwave background and other cosmological observation limits.
Article
Physics, Particles & Fields
Dugald Hepburn, Stephen M. M. West
Summary: In this paper, a Portalino-like model of dark matter and neutrino masses is explored, where right-handed neutrino fields connect gauge neutral operators from the Standard Model and Hidden Sector. Neutrino masses are generated through a seesaw-like mechanism that explains the light active neutrino masses. The model includes a Portalino state that connects the two sectors via the neutrino portal. The viable mass ranges for the Portalino states are found to be 0.02 eV ≤ mn ≤ 6.4 eV or 489 MeV ≤ mn ≤ TeV, considering constraints from Big Bang Nucleosynthesis and measurements of the Cosmic Microwave Background radiation.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Astronomy & Astrophysics
Joerg Jaeckel, Sebastian Schenk
Summary: The study investigates the cosmological stability of light bosonic dark matter with tiny electric charge. It finds that annihilation into gauge bosons can be greatly enhanced by parametric resonance in the wavelike regime. Observational constraints on millicharge are stronger with direct coupling, while parameter space is significantly affected by parametric resonance in the case of kinetic mixing.
Article
Physics, Particles & Fields
Eduardo Gonzalo, Miguel Montero, Georges Obied, Cumrun Vafa
Summary: This study explores the cosmological aspects of the Dark Dimension and proposes the existence of dark gravitons as a potential dark matter candidate. By analyzing the generic features of the dark dimension cosmology, the study provides a natural explanation for the correct dark matter density and the resolution of the cosmological coincidence problem.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Astronomy & Astrophysics
Yann Mambrini, Keith A. Olive
Summary: This study investigates the direct s-channel gravitational production of dark matter during the reheating process, finding that the abundance of dark matter primarily depends on the combination T-max(4)/TRHMP3 and can be produced at sufficient densities over a wide range of dark matter masses, from 1 GeV to 1 ZeV.
Article
Physics, Multidisciplinary
Itamar J. Allali, Mark P. Hertzberg
Summary: Quantum mechanics allows for macroscopic superpositions which often decohere rapidly due to environmental interactions, but systems interacting solely gravitationally, such as arrangements of dark matter, may exhibit slow decoherence. In this study, the decoherence rate of a quantum object within general relativity was calculated, focusing on superposed metric oscillations, a rare quantum general relativistic result. It was found that dark matter in the Milky Way is robust against decoherence in a superposition of the field's phase, while spatial superpositions are not, potentially impacting direct detection experiments.
PHYSICAL REVIEW LETTERS
(2021)
Article
Astronomy & Astrophysics
Mar Bastero-Gil, Jose Santiago, Roberto Vega-Morales, Lorenzo Ubaldi
Summary: We study a mechanism for producing dark photon dark matter at the end of inflation. The rolling inflaton induces a tachyonic instability, leading to the coherent production of dark gauge bosons. We examine the case where the dark photons are relativistic when their mass is generated and calculate the relic abundance today. Furthermore, we analyze the late time power spectrum and find that it preserves the peak generated at the end of inflation.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Wei Chao, Jing-Jing Feng, Mingjie Jin
Summary: In this paper, the impact of the decay of excited states on the effective number of neutrino species, Neff, is investigated in the framework of pseudo-Dirac cold dark matter via the Higgs portal. The relic density and direct detection signal of the dark matter are calculated, revealing the available parameter space. The study shows that the decay of excited states can lead to a maximum value of j Delta Neffj of the order Oo0.1 thorn, which can be probed by future CMB-S4 and SPT/SO projects.
Article
Astronomy & Astrophysics
Eung Jin Chun, Seokhoon Yun
Summary: Interactions with a background medium can modify the dispersion relation and canonical normalization of particles. This is important when considering the coupling between light dark matter and quarks and leptons. In this paper, the authors discuss this issue in the context of a vector dark matter background with randomly distributed polarizations or a fixed polarization in a single direction. The observations related to particle dispersion can impose constraints on new light Abelian gauge boson models. The classical vector field also induces significant changes in particle normalization, ruling out a large parameter region of the generic vector dark matter model.
Review
Multidisciplinary Sciences
Malcolm Fairbairn
Summary: This article provides a brief overview of galactic astrophysics and astronomy aspects that may have implications for particle dark matter, highlighting the tendency of particle physicists to overlook already resolved anomalies in their attempts to address observed anomalies in galaxies.
Article
Astronomy & Astrophysics
Hooman Davoudiasl, Hye-Sung Lee, William J. Marciano
Article
Physics, Nuclear
Kunio Kaneta, Subeom Kang, Hye-Sung Lee
INTERNATIONAL JOURNAL OF MODERN PHYSICS A
(2016)
Article
Physics, Nuclear
Yu Seon Jeong, C. S. Kim, Hye-Sung Lee
INTERNATIONAL JOURNAL OF MODERN PHYSICS A
(2016)
Article
Physics, Nuclear
Sunghoon Jung, Hye-Sung Lee
INTERNATIONAL JOURNAL OF MODERN PHYSICS A
(2017)
Article
Physics, Multidisciplinary
Kunio Kaneta, Hye-Sung Lee, Seokhoon Yun
PHYSICAL REVIEW LETTERS
(2017)
Article
Astronomy & Astrophysics
Hye-Sung Lee, Min-Seok Seo
Article
Physics, Particles & Fields
Kunio Kaneta, Zhaofeng Kang, Hye-Sung Lee
JOURNAL OF HIGH ENERGY PHYSICS
(2017)
Article
Physics, Nuclear
Fa Peng Huang, Hye-Sung Lee
INTERNATIONAL JOURNAL OF MODERN PHYSICS A
(2019)
Article
Astronomy & Astrophysics
Jeong Han Kim, Samuel D. Lane, Hye-Sung Lee, Ian M. Lewis, Matthew Sullivan
Article
Astronomy & Astrophysics
Patrick deNiverville, Hye-Sung Lee
Article
Astronomy & Astrophysics
Hye-Sung Lee, Wen Yin
Article
Astronomy & Astrophysics
Kunio Kaneta, Hye-Sung Lee, Seokhoon Yun
Article
Astronomy & Astrophysics
Hye-Sung Lee, Seokhoon Yun
Article
Astronomy & Astrophysics
Minho Kim, Hye-Sung Lee, Myeonghun Park, Mengchao Zhang
Article
Astronomy & Astrophysics
Patrick deNiverville, Hye-Sung Lee, Min-Seok Seo
Article
Astronomy & Astrophysics
Nelson R. F. Braga, Octavio C. Junqueira
Summary: This study investigates the influence of rotation on the transition temperature of strongly interacting matter produced in non-central heavy ion collisions. By using a holographic description of an AdS black hole, the authors extend the analysis to the more realistic case where the matter spreads over a region around the rotational axis. The results show the coexistence of confined and deconfined phases and are consistent with the concept of local temperature in rotating frames developed by Tolman and Ehrenfest.
Article
Astronomy & Astrophysics
Bing Sun, Jiachen An, Zhoujian Cao
Summary: This paper investigates the effect of gravitational constant variation on the propagation of gravitational waves. By employing two analytical methods, the study finds that variations in the gravitational constant result in amplitude and phase corrections for gravitational waves, and the time variation of the gravitational constant can be constrained through the propagation of gravitational waves.
Article
Astronomy & Astrophysics
Abdellah Touati, Zaim Slimane
Summary: This letter presents the first study of Hawking radiation as a tunneling process within the framework of non-commutative gauge theory of gravity. The non-commutative Schwarzschild black hole is reconstructed using the Seiberg-Witten map and the star product. The emission spectrum of outgoing massless particles is computed using the quantum tunneling mechanism. The results reveal pure thermal radiation in the low-frequency scenario, but a deviation from pure thermal radiation in the high-frequency scenario due to energy conservation. It is also found that noncommutativity enhances the correlations between successively emitted particles.
Article
Astronomy & Astrophysics
Shahar Hod
Summary: The travel times of light signals between two antipodal points on a compact star's surface are calculated for two different trajectories. It is shown that, for highly dense stars, the longer trajectory along the surface may have a shorter travel time as measured by asymptotic observers. A critical value of the dimensionless density-area parameter is determined for constant density stars to distinguish cases where crossing through the star's center or following a semi-circular trajectory on the surface has a shorter travel time as measured by asymptotic observers.
