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All presently known stellar-dynamical constraints on the size and mass of the supermassive compact dark object at the Galactic center are consistent with a ball of self-gravitating, nearly non-interacting, degenerate fermions with mass…

Astrophysics · Physics 2007-05-23 Neven Bilic , Gary B. Tupper , Raoul D. Viollier

Thermal relics lighter than an MeV contribute to the energy density of the universe at the time of nucleosynthesis and recombination. Constraints on extra radiation degrees of freedom typically exclude even the simplest of such dark…

High Energy Physics - Phenomenology · Physics 2019-05-29 Asher Berlin , Nikita Blinov

Dark matter experiments primarily search for the scattering of WIMPs on target nuclei of well shielded underground detectors. The results from liquid scintillator experiments furthermore provide precise probes of very light and very weakly…

High Energy Physics - Phenomenology · Physics 2015-10-19 Haipeng An , Kaixuan Ni , Maxim Pospelov , Josef Pradler , Adam Ritz

We continue to explore a question about the existence of a new strongly coupled dynamics above the electroweak scale. The latter has been recently realized in the simplest consistent scenario, the vector-like (or chiral-symmetric)…

High Energy Physics - Phenomenology · Physics 2015-06-17 Roman Pasechnik , Vitaly Beylin , Vladimir Kuksa , Grigory Vereshkov

We show that new physics can show up in dileptonic events through its radiative contributions to the dilepton invariant mass, leading to unique "monocline" features in $m_{\ell\ell}$, as well as the angular distribution of the leptons. We…

High Energy Physics - Phenomenology · Physics 2015-06-17 Wolfgang Altmannshofer , Patrick J. Fox , Roni Harnik , Graham D. Kribs , Nirmal Raj

A singlet fermion which interacts only with a new singlet scalar provides a viable and minimal scenario that can explain the dark matter. The singlet fermion is the dark matter particle whereas the new scalar mixes with the Higgs boson…

High Energy Physics - Phenomenology · Physics 2013-10-30 Sonja Esch , Michael Klasen , Carlos E. Yaguna

Current dark matter detection strategies are based on the assumption that the dark matter is a gas of non-interacting particles with a reasonably large number density. This picture is dramatically altered if there are significant self…

High Energy Physics - Phenomenology · Physics 2018-12-19 Dorota M Grabowska , Tom Melia , Surjeet Rajendran

A search for sub-GeV dark matter produced from collisions of the Fermilab 8 GeV Booster protons with a steel beam dump was performed by the MiniBooNE-DM Collaboration using data from $1.86 \times 10^{20}$ protons on target in a dedicated…

We study the possibility that dark matter is a baryon of a new strongly interacting gauge theory, which was introduced in the low energy theory of Cosmological SUSY Breaking (CSB). This particle can fit the observed dark matter density if…

High Energy Physics - Phenomenology · Physics 2009-11-11 T. Banks , J. D. Mason , D. O'Neil

We propose a new method to detect low-energy neutrinos and low-mass dark matter at or below the MeV scale, through their coherent scatterings from freely falling heavy atoms and the resulting kinematic shifts. We start with a simple…

High Energy Physics - Phenomenology · Physics 2023-03-07 Alim Ruzi , Sitian Qian , Tianyi Yang , Qiang Li

The elastic nuclear recoil signal, being under intense scrutiny by multiple underground experiments, can be interpreted either as coming from the interaction of nuclei with WIMP dark matter or from the scattering of new species of…

High Energy Physics - Phenomenology · Physics 2014-03-26 Maxim Pospelov , Josef Pradler

A comet-like, but magnitudes smaller, extremely low albedo interstellar meteoroid population of fragile aggregates with solar type composition, measured in space and terrestrially, is most probably the universal dark matter. Although…

Astrophysics · Physics 2007-05-23 Robert K. Soberman , Maurice Dubin

The nonbaryonic dark matter of the Universe might consist of new stable charged species, bound by ordinary Coulomb interactions in various forms of heavy neutral "dark atoms". The existing models offer natural implementations for the…

High Energy Physics - Phenomenology · Physics 2015-06-10 Konstantin Belotsky , Maxim Khlopov , Maxim Laletin

We consider a model of dark matter whose most prominent signature is a monochromatic flux of TeV neutrinos from the galactic center. As an example of a general scenario, we consider a specific model where the dark matter is a fermion in the…

High Energy Physics - Phenomenology · Physics 2009-08-14 Adam Falkowski , Jose Juknevich , Jessie Shelton

The XENON experiment aims at the direct detection of dark matter in the form of WIMPs (Weakly Interacting Massive Particles) via their elastic scattering off Xenon nuclei. With a fiducial mass of 1000 kg of liquid xenon, a sufficiently low…

Astrophysics · Physics 2007-05-23 XENON Collaboration , Elena Aprile

Light (sub-GeV) dark matter has gained increasing interest in terms of direct detection. Accelerated dark matter is a promising candidate that can generate detectable nuclear recoil energy within the sub-GeV range. Because of the large…

High Energy Physics - Phenomenology · Physics 2024-01-23 Liangliang Su , Lei Wu , Bin Zhu

Although various pieces of indirect evidence about the nature of dark matter have been collected, its direct detection has eluded experimental searches despite extensive effort. If the mass of dark matter is below 1 MeV, it is essentially…

Quantum Physics · Physics 2013-12-16 C. Jess Riedel

The Dark Ages and the Cosmic Dawn are an untapped well of information about the particle physics properties of dark matter, which may become accessible with future radio telescopes able to probe the 21-cm signal from atomic hydrogen. In…

Cosmology and Nongalactic Astrophysics · Physics 2026-04-22 Markus R. Mosbech , Cristina Benso , Felix Kahlhoefer

The presence of dark matter has been ascertained through a wealth of astrophysical and cosmological phenomena and its nature is a central puzzle in modern science. Elementary particles stand as the most compelling explanation. They have…

High Energy Physics - Phenomenology · Physics 2019-10-02 Daniel A. Camargo , Farinaldo S. Queiroz , Riccardo Sturani

A number of direct detection experiments are searching for electron excitations created by scattering of sub-GeV dark matter. We present an alternate formulation of dark matter-electron scattering in terms of the dielectric response of a…

High Energy Physics - Phenomenology · Physics 2021-08-04 Simon Knapen , Jonathan Kozaczuk , Tongyan Lin
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