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
Astronomy & Astrophysics
J. R. Angevaare, G. Bertone, A. P. Colijn, M. P. Decowski, B. J. Kavanagh
Summary: In this work, Bayesian inference is used to identify the parameter space where future detectors can detect WIMP Dark Matter through nuclear recoils, Migdal-induced electronic recoils, or a combination of both. The study determines the regions where each detector is best at constraining the Dark Matter mass and spin independent cross-section and infers the complementary nature of two or more detection configurations in constraining these Dark Matter parameters through a combined analysis.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
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
Astronomy & Astrophysics
Elham Rahimi, Evan Vienneau, Nassim Bozorgnia, Andrew Robertson
Summary: We investigate the impact of dark matter self-interactions on the local distribution of dark matter in selected Milky Way-like galaxies. Two different self-interacting dark matter models, with constant and velocity-dependent self-interaction cross-sections, are employed in hydrodynamical simulations. The results show that adding self-interactions and baryons in the simulations leads to local velocity distributions of dark matter halos resembling those obtained from simulations with cold collisionless dark matter and baryons. The best fit Maxwellian distributions fit well with the local dark matter speed distributions in both cases. Inclusion of baryons increases the local dark matter density and shifts the dark matter speed distributions to higher speeds. Considering the implications for direct detection, the halo integrals obtained directly from the simulations are compared to those derived from the best fit Maxwellian velocity distribution, with the majority of halos showing good agreement with the Maxwellian distribution regardless of the dark matter self-interaction models.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Article
History & Philosophy Of Science
Siska De Baerdemaeker
Summary: Particle physicists have set up experiments to detect dark matter particles using a different logic structure due to the limited description of dark matter. By exploring this "method-driven logic," new insights are provided on measurement robustness and methodological pluralism in the context of dark matter research.
PHILOSOPHY OF SCIENCE
(2021)
Review
Physics, Multidisciplinary
Hyun Min Lee
Summary: This article reviews the current status of model building for light dark matter in theories of QCD-like gauge groups in the hidden sector, focusing on dark mesons with SU(3)(V) flavor symmetry in scenarios of Strongly Interacting Massive Particles. The production mechanism and kinetic equilibrium condition for dark mesons are discussed, along with a unitarization of dark chiral perturbation theory with vector mesons in the scheme of hidden gauge symmetry.
EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS
(2022)
Article
Astronomy & Astrophysics
Riccardo Catena, Taylor R. Gray
Summary: This study extends the current framework for dark matter search to include spin-1 dark matter models. The study explores simplified models and a non-abelian gauge group-based model, calculating various properties of these models and comparing them with experimental results. The study finds that the simplified models are strongly constrained by current experiments and the unitarity bound, while the vector SIMP model is compatible with current observations in a wide region of the parameter space.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Article
Astronomy & Astrophysics
Youjia Wu, Sebastian Baum, Katherine Freese, Luca Visinelli, Hai -Bo Yu
Summary: Dark matter annihilation could potentially power the formation of the first luminous stars in the Universe, known as dark stars. In this study, we investigate the formation of dark stars in the self-interacting dark matter (SIDM) scenario. We propose a concrete particle physics model for SIDM that can explain various astrophysical observations and address small-scale problems of collisionless dark matter. Our findings suggest that dark stars powered by SIDM can have similar properties to those predicted in collisionless dark matter models.
Article
Astronomy & Astrophysics
Nikita Blinov, Gordan Krnjaic, Douglas Tuckler
Summary: Fixed target missing-momentum experiments like LDMX and M-3 are powerful tools for probing light dark matter and other weakly coupled particles beyond the Standard Model. By measuring kinematic variables and experimental parameters such as beam energy and polarization, these experiments can potentially discriminate between models and study the properties of radiated particles. In particular, variations in beam energy, polarization, and lepton flavor can be utilized to disentangle the Lorentz structure of new interactions.
Article
Astronomy & Astrophysics
Hyungjin Kim, Alessandro Lenoci
Summary: This study investigates the local overdensity of dark matter caused by massive astrophysical objects and the effects of gravitational focusing on dark matter signals. It provides insights into the similarities and differences between wave dark matter and particle dark matter, and examines the impact of wave properties on density contrast and spectrum.
Article
Physics, Particles & Fields
Yoo-Jin Kang, Hyun Min Lee
Summary: The study proposes a new mechanism for dark matter self-interaction in the presence of a massive spin-2 mediator, finding that the resulting self-scattering cross section is velocity-dependent. The model is shown to be marginally compatible with perturbative unitarity in the ghost-free realization of the massive spin-2 particle.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Astronomy & Astrophysics
D. Pugliese, Z. Stuchlik
Summary: By comparing different dark matter models, we have investigated the influence of dark matter on black hole accretion disk physics. Our results show that the accretion onto a black hole can serve as a good indicator of the presence of dark matter. We have analyzed the accretion around spinning black holes immersed in perfect-fluid dark matter, cold dark matter, and scalar field dark matter. The study reveals distinctive effects of dark matter on toroidal accretion disks and protojet configurations, suggesting that black hole accretion tori immersed in dark matter may exhibit characteristics similar to superspinars and naked singularity attractors.
Article
Physics, Multidisciplinary
Yohei Ema, Filippo Sala, Ryosuke Sato
Summary: The study establishes new strong limits on interactions of sub-GeV Dark Matter with nuclei using data from cosmic-ray upscatterings, and demonstrates that their proposal tests genuinely new parameter space. This motivates and shapes a new physics case for large volume detectors sensitive to nuclear recoils.
Article
Astronomy & Astrophysics
Huangyu Xiao, Xuejian Shen, Philip F. Hopkins, Kathryn M. Zurek
Summary: The study suggests that a dissipative dark matter interaction cross-section of about 0.05 cm^2/g is sufficient to produce the observed supermassive black holes in the early Universe through the collapse of high density dark matter fluctuations in rare scenarios.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Andreas Nygaard, Thomas Tram, Steen Hannestad
Summary: This study updates constraints on the simple decaying cold dark matter model with dark radiation, using the latest CMB data to infer new constraints in both short-lived and long-lived regimes. The model's impact on Hubble and sigma 8 tensions is investigated, showing that each decay regime can slightly alleviate a different tension, but not both simultaneously. The study also derives a mapping between short-lived DCDM and a correction to the effective number of massless neutrino species.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)