Article
Astronomy & Astrophysics
Cristina Mondino, Maxim Pospelov, Joshua T. Ruderman, Oren Slone
Summary: A new U(1) dark gauge group is coupled to the Standard Model through kinetic mixing, providing a dark matter candidate in the form of the dark Higgs field, which generates the mass of the dark photon. Conditions involving the mass of the dark Higgs, the kinetic mixing parameter, and the dark gauge coupling lead to a sufficiently metastable dark Higgs to serve as dark matter. Both freeze-in and freeze-out processes can result in viable dark Higgs dark matter with a sub-GeV mass and a specific range of kinetic mixing parameter.
Article
Astronomy & Astrophysics
Rodrigo Alonso, Jakub Scholtz
Summary: It has been found that the abundance of dark matter may be sourced by the baryon/lepton asymmetry of the early Universe. Through the mechanism of the Goldstone field, initial conditions for dark matter can be dynamically generated, with predictions showing an inverse dependence on coupling. When combined with leptogenesis, a viable region of parameter space for dark matter production can be identified.
Article
Astronomy & Astrophysics
Csaba Csaki, Sungwoo Hong, Gowri Kurup, Seung J. Lee, Maxim Perelstein, Wei Xue
Summary: The study focuses on dark matter models based on a gapped continuum, describing a mixture of states with continuous mass distribution using effective field theory. A specific weakly interacting continuum (WIC) model is considered, which successfully reproduces observed relic density and exhibits intriguing observational consequences such as continuous and cascade decays of dark matter states.
Article
Astronomy & Astrophysics
Philippe Brax, Kunio Kaneta, Yann Mambrini, Mathias Pierre
Summary: In this study, dark matter production is generalized to a two-metric framework where the physical metric coupling to the Standard Model is related to the gravitational dynamics metric. The research shows that this setup is naturally present in many Ultra Violet constructions and investigates dark matter production in the early Universe through scatterings off the thermal bath and radiative decay of the inflaton. Additionally, noninstantaneous reheating effects are taken into account at the end of inflation.
Article
Physics, Multidisciplinary
Pierluca Carenza, Roman Pasechnik, Gustavo Salinas, Zhi-Wei Wang
Summary: This paper reexamines the possibility of dark matter being composed of stable scalar glueballs, and studies the relic abundance of glueballs in a thermal effective theory. The use of an effective potential fitted by lattice simulations leads to a prediction that is an order of magnitude smaller than existing results.
PHYSICAL REVIEW LETTERS
(2022)
Article
Astronomy & Astrophysics
Joshua W. Foster, Yonatan Kahn, Rachel Nguyen, Nicholas L. Rodd, Benjamin R. Safdi
Summary: The next generation of ultralight dark matter direct detection experiments will utilize multiple detectors operating at different terrestrial locations to confirm sub-eV bosons as the dominant source of DM. By combining data from multiple detectors, directional information about the DM phase space distribution can be constrained. Additionally, it is shown that the signal in multiple detectors exhibits a daily modulation effect unique to wavelike DM.
Article
Physics, Multidisciplinary
Pouya Asadi, Eric David Kramer, Eric Kuflik, Gregory W. Ridgway, Tracy R. Slatyer, Juri Smirnov
Summary: This study examines the impact of a first-order phase transition in a confining SU(N) dark sector with heavy dark quarks, focusing on the behavior of heavy dark quarks during the phase transition and the resulting dark matter candidates. The research shows that the correct dark matter abundance can be achieved for O(1-100) PeV dark quarks, exceeding the usual unitarity bound.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Yu-Dai Tsai, Robert McGehee, Hitoshi Murayama
Summary: This paper presents new models based on QCD-like dark sectors to solve small-scale structure problems. By drawing analogies to the meson spectra in standard model QCD, the models introduce resonant self-interacting dark matter and discuss experimental probes for both setups. The paper also comments on the resonant self-interactions already built into SIMP and ELDER mechanisms.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
Ronny Frumkin, Eric Kuflik, Itay Lavie, Tal Silverwater
Summary: We study the general properties of the freeze-out of a thermal relic and provide estimates for relic abundance and corrections for slow freeze-out processes. The results generalize the relationship between dark matter mass and coupling. The study also predicts nearly degenerate states and generically metastable dark matter beyond the conventional freeze-out maximum mass.
PHYSICAL REVIEW LETTERS
(2023)
Article
Astronomy & Astrophysics
Enrico Cannizzaro, Laura Sberna, Andrea Caputo, Paolo Pani
Summary: This study shows that black-hole superradiance bounds on dark photons can be challenged by simple extensions of the minimal model, depending on the interaction between dark photons and dark matter.
Article
Astronomy & Astrophysics
Yu Cheng, Wei Liao
Summary: Light dark matter with right relic density can be produced by the decay of other dark sector particles. The dark matter candidate is generated by the decay of a heavier dark sector singlet scalar, and its mass can be at the GeV or MeV scale with very weak interactions. The dark sector singlet scalar can have a mass at the GeV-TeV scale and interacts weakly with Standard Model particles.
Article
Astronomy & Astrophysics
Arya Farahi, Daisuke Nagai, Dhayaa Anbajagane
Summary: In this work, the coupling between dark matter, hot gas, and stellar mass is studied using cosmological simulations. The researchers find that the strength of this coupling depends on the scale at which halo profiles are measured. They also observe a radius-dependent additive bias when halos are selected based on properties other than their mass, which has implications for cluster abundance and cross-correlation cosmology.
ASTROPHYSICAL JOURNAL
(2022)
Article
Physics, Multidisciplinary
Haipeng An, Fa Peng Huang, Jia Liu, Wei Xue
Summary: The Dark Photon, a candidate for ultralight dark matter, can be detected using radio telescopes during solar observations. The conversion of dark photon dark matter into photons in the solar corona allows for efficient detection. Radio telescopes offer high sensitivity in specific frequency ranges, leading to promising results for future experiments.
PHYSICAL REVIEW LETTERS
(2021)
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
Mateja Gosenca, Andrew Eberhardt, Yourong Wang, Benedikt Eggemeier, Emily Kendall, J. Luna Zagorac, Richard Easther
Summary: Ultralight dark matter (ULDM) is usually assumed to be a single scalar field, but we explore the possibility that it consists of N light scalar fields with only gravitational interactions, which is more consistent with the underlying particle physics motivations for these scenarios. In multifield simulations, we find that the amplitude of the total density fluctuations inside a ULDM halo decreases as 1/sqrt(N) and the fields do not significantly correlate over cosmological timescales. Smoother halos heat stellar orbits less efficiently, weakening the observational constraints on the field mass.
Article
Physics, Particles & Fields
T. Fukuyama, T. Kikuchi, K. Matsuda
EUROPEAN PHYSICAL JOURNAL C
(2008)
Review
Physics, Particles & Fields
T. Fukuyama, A. Ilakovac, T. Kikuchi
EUROPEAN PHYSICAL JOURNAL C
(2008)
Article
Astronomy & Astrophysics
Takeshi Fukuyama, Tatsuru Kikuchi
MODERN PHYSICS LETTERS A
(2009)
Article
Astronomy & Astrophysics
Tatsuru Kikuchi, Nobuchika Okada, Michihisa Takeuchi
Article
Astronomy & Astrophysics
Tatsuru Kikuchi, Takayuki Kubo
Article
Astronomy & Astrophysics
Tatsuru Kikuchi, Nobuchika Okada
Article
Astronomy & Astrophysics
Tatsuru Kikuchi, Takayuki Kubo
Article
Astronomy & Astrophysics
Tatsuru Kikuchi
Article
Physics, Particles & Fields
Tatsuru Kikuchi
JOURNAL OF HIGH ENERGY PHYSICS
(2008)
Article
Physics, Nuclear
Takeshi Fukuyama, Tatsuru Kikuchi, Nobuchika Okada
INTERNATIONAL JOURNAL OF MODERN PHYSICS E
(2007)
Article
Astronomy & Astrophysics
Takeshi Fukuyama, Tatsuru Kikuchi, Nobuchika Okada
Article
Astronomy & Astrophysics
Takeshi Fukuyama, Tatsuru Kikuchi
Article
Physics, Particles & Fields
T. Fukuyama, T. Kikuchi
EUROPEAN PHYSICAL JOURNAL C
(2006)
Article
Astronomy & Astrophysics
T Fukuyama, T Kikuchi, W Naylor
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.
