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Is Dark Matter part of a Dark Sector? The possibility of a dark sector neutral under Standard Model (SM) forces furnishes an attractive explanation for the existence of Dark Matter (DM), and is a compelling new-physics direction to explore…

Structure formation at small cosmological scales provides an important frontier for dark matter (DM) research. Scenarios with small DM particle masses, large momenta or hidden interactions tend to suppress the gravitational clustering at…

Cosmology and Nongalactic Astrophysics · Physics 2017-11-27 Riccardo Murgia , Alexander Merle , Matteo Viel , Maximilian Totzauer , Aurel Schneider

The measurements of the Hubble parameter using the cosmic microwave background radiation appear to be inconsistent with the measurements of this parameter using Cepheid variable stars. This inconsistency may be a result of using the…

General Physics · Physics 2021-01-25 Nikodem J. Popławski

Soft cosmology is an extension of standard cosmology allowing for a scale-dependent equation-of-state (EoS) parameter in the dark sectors, which is one of the properties of soft materials in condensed-matter physics, that may arise either…

Cosmology and Nongalactic Astrophysics · Physics 2022-12-12 Emmanuel N. Saridakis , Weiqiang Yang , Supriya Pan , Fotios K. Anagnostopoulos , Spyros Basilakos

The nonbaryonic dark matter of the Universe can consist of new stable charged leptons and quarks, if they are hidden in elusive "dark atoms" of composite dark matter. Such possibility can be compatible with the severe constraints on…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-20 Maxim Yu. Khlopov

A huge amount of good quality astrophysical data converges towards the picture of a spatially flat universe undergoing the today observed phase of accelerated expansion. This new observational trend is commonly addressed as Precision…

Astrophysics · Physics 2009-06-23 S. Capozziello

The cosmological scenario where the Peccei-Quinn symmetry is broken after inflation is investigated. In this scenario, topological defects such as strings and domain walls produce a large number of axions, which contribute to the cold dark…

High Energy Physics - Phenomenology · Physics 2015-08-12 Masahiro Kawasaki , Ken'ichi Saikawa , Toyokazu Sekiguchi

The nonbaryonic dark matter of the Universe is assumed to consist of new stable forms of matter. Their stability reflects symmetry of micro world and mechanisms of its symmetry breaking. Particle candidates for cosmological dark matter are…

Cosmology and Nongalactic Astrophysics · Physics 2013-11-12 Maxim Yu. Khlopov

We report the first constraints on the properties of weakly interacting low-mass dark matter (DM) particles using asteroseismology. The additional energy transport mechanism due to accumulated asymmetric DM particles modifies the central…

Solar and Stellar Astrophysics · Physics 2013-02-20 Jordi Casanellas , Ilídio Lopes

(Abridged) Present cosmological constraints and the absence of a direct detection and identification of any dark matter particle candidate leave room to the possibility that the dark sector of the Universe be actually more complex than it…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-04 Marco Baldi

The nature of dark matter remains obscure in spite of decades of experimental efforts. The mass of dark matter candidates can span a wide range, and its coupling with the Standard Model sector remains uncertain. All these unknowns make the…

The WIMPs are considered one of the favorable dark matter (DM) candidates, but as the upper bounds on the interactions between DM and standard model (SM) particles obtained by the upgraded facilities of DM direct detections get lower and…

High Energy Physics - Phenomenology · Physics 2017-02-01 Lian-Bao Jia , Xue-Qian Li

Recent lattice measurements have given accurate estimates of the light and strange quark condensates in the proton. We use these new results to significantly improve the dark matter predictions in a set of benchmark models that represent…

High Energy Physics - Phenomenology · Physics 2010-03-04 Joel Giedt , Anthony W. Thomas , Ross D. Young

In this paper we review the main theoretical and experimental achievements in the field of Dark Matter from the Cosmological and Astrophysical point of view. We revisit it from the very first surveys of local astrophysical matter, up to the…

Cosmology and Nongalactic Astrophysics · Physics 2014-11-14 Vladimir Lukovic , Paolo Cabella , Nicola Vittorio

The cold dark matter (CDM) scenario has proved successful in cosmology. However, we lack a fundamental understanding of its microscopic nature. Moreover, the apparent disagreement between CDM predictions and subgalactic-structure…

Cosmology and Nongalactic Astrophysics · Physics 2018-08-29 J. A. R. Cembranos , A. L. Maroto , S. J. Núñez Jareño , H. Villarrubia-Rojo

Thermal freeze-out offers an attractive explanation of the dark matter density free from fine-tuning of initial conditions. For dark matter with a mass below tens of MeV, photons, electrons, and neutrinos are the only available direct…

High Energy Physics - Phenomenology · Physics 2024-05-10 Xiaoyong Chu , Josef Pradler

The Standard Model of Fundamental Interactions (SM) represents one of the most precise theories in physics. Among the predictions of the SM we find, for instance, the anomalous magnetic moment of the electron $a_e = 0.001159652181643(764)$.…

High Energy Physics - Phenomenology · Physics 2021-04-29 Miguel G. Folgado

The nature of dark matter is unknown. A number of dark matter candidates are quantum flavor-mixed particles but this property has never been accounted for in cosmology. Here we explore this possibility from the first principles via…

Cosmology and Nongalactic Astrophysics · Physics 2015-02-13 Mikhail V. Medvedev

We propose an experiment to search for ultralight scalar dark matter (DM) with dilatonic interactions. Such couplings can arise for the dilaton as well as for moduli and axion-like particles in the presence of CP violation. Ultralight…

High Energy Physics - Phenomenology · Physics 2015-02-03 Asimina Arvanitaki , Junwu Huang , Ken Van Tilburg

The era of precision cosmology allows us to test the composition of the dark matter. Mixed ultralight or fuzzy dark matter (FDM) is a cosmological model with dark matter composed of a combination of particles of mass $m\leq…

Cosmology and Nongalactic Astrophysics · Physics 2023-12-11 Alex Laguë , Bodo Schwabe , Renée Hložek , David J. E. Marsh , Keir K. Rogers