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Dark matter with MeV scale mass is difficult to detect with standard direct search detectors. However, they can be searched for by considering the up-scattering of kinetic energies by cosmic rays. Because the dark matter density is higher…

Cosmology and Nongalactic Astrophysics · Physics 2023-08-01 Keiko I. Nagao , Satoshi Higashino , Tatsuhiro Naka , Kentaro Miuchi

The identification of the nature of dark matter is one of the most important problems confronting particle physics. Current observational constraints permit the mass of the dark matter to range from $10^{-22}$ eV - $10^{48}$ GeV. Given the…

High Energy Physics - Phenomenology · Physics 2022-04-08 Surjeet Rajendran

One of the frontiers for advancing what is known about dark matter lies in using strong gravitational lenses to characterize the population of the smallest dark matter halos. There is a large volume of information in strong gravitational…

Cosmology and Nongalactic Astrophysics · Physics 2023-09-01 Ryan E. Keeley , Anna M. Nierenberg , Daniel Gilman , Simon Birrer , Andrew Benson , Tommaso Treu

The dark matter relic density has been measured by Planck and its predecessors with an accuracy of about 2%. We present theoretical calculations with the numerical program DM@NLO in next-to-leading order SUSY QCD and beyond, which allow to…

High Energy Physics - Phenomenology · Physics 2014-08-22 J. Harz , B. Herrmann , M. Klasen , K. Kovarik , M. Meinecke , P. Steppeler

As cosmology has entered a phase of precision experiments, the content of the universe has been established to contain interesting and not yet fully understood components, namely dark energy and dark matter. While the cause and exact nature…

High Energy Physics - Phenomenology · Physics 2015-06-25 Lars Bergstrom

In this Letter we explore the direct detection of the dark matter in the universe, assuming the dark matter particles are degenerate in mass with new colored particles below TeV scale. The scenario with such a mass spectrum is difficult to…

High Energy Physics - Phenomenology · Physics 2011-12-22 Junji Hisano , Koji Ishiwata , Natsumi Nagata

Exotic dark matter together with the vacuum energy or cosmological constant seem to dominate in the Universe. An even higher density of such matter seems to be gravitationally trapped in the Galaxy. Thus its direct detection is central to…

High Energy Physics - Phenomenology · Physics 2014-11-17 J. D. Vergados

The detection of High Energy Cosmic Rays (HECR) with energies around and beyond GZK expected cutoff has introduced the idea of existence of a decaying Ultra Heavy Dark Matter (UHDM). If this type of particles make a substantial part of the…

Astrophysics · Physics 2007-05-23 Houri Ziaeepour

We propose a new mechanism for thermal dark matter freezeout, termed Co-Decaying Dark Matter. Multi-component dark sectors with degenerate particles and out-of-equilibrium decays can co-decay to obtain the observed relic density. The dark…

High Energy Physics - Phenomenology · Physics 2016-12-08 Jeff Asaf Dror , Eric Kuflik , Wee Hao Ng

In this contribution I review the present status and discuss some prospects for indirect detection of dark matter with gamma-rays. Thanks to the Fermi Large Area Telescope, searches in gamma-rays have reached sensitivities that allow to…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-11 Jan Conrad

We propose a novel strategy to search for new physics in timing spectra, envisioning the situation in which a new particle comes from the decay of its heavier partner with a finite particle width. The timing distribution of events induced…

High Energy Physics - Phenomenology · Physics 2020-04-01 Bhaskar Dutta , Doojin Kim , Shu Liao , Jong-Chul Park , Seodong Shin , Louis E. Strigari

Recently we studied the direct detection of multi-component dark matter with arbitrary local energy densities. Although the generation of the dark matter relic abundance is model-dependent, and in principle could be only indirectly related…

High Energy Physics - Phenomenology · Physics 2019-01-23 Juan Herrero-Garcia , Andre Scaffidi , Martin White , Anthony G. Williams

Asymmetric dark matter theories generically allow for mass terms that lead to particle-antiparticle mixing. Over the age of the Universe, dark matter can thus oscillate from a purely asymmetric configuration into a symmetric mix of…

High Energy Physics - Phenomenology · Physics 2013-05-30 Matthew R. Buckley , Stefano Profumo

We compute the neutralino-nucleon cross section in several supersymmetric scenarios, taking into account all kind of experimental and astrophysical constraints. In addition, the constraints that the absence of dangerous charge and colour…

High Energy Physics - Phenomenology · Physics 2007-05-23 C. Munoz

The sub-keV mass range has long posed a challenge for the direct detection of dark matter via elastic scattering. In this Letter, we propose a new mechanism in which dark matter, assumed to be quadratically coupled to SM particles, scatters…

High Energy Physics - Phenomenology · Physics 2025-12-19 Zhi-Han Liu , Shigeki Matsumoto , Jie Sheng , Chuan-Yang Xing

If dark matter is composed of weakly interacting particles with mass in the GeV-TeV range, their annihilation or decay may produce gamma rays that could be detected by gamma-ray telescopes. Observations of dwarf spheroidal satellite…

High Energy Astrophysical Phenomena · Physics 2020-04-30 Javier Rico

We determine the ability of future experiments to observe supersymmetric contributions to the rare decays $B \to X_s \gamma$ and $B \to X_s l^+l^-$. A global fit to the Wilson coefficients which contribute to these decays is performed from…

High Energy Physics - Phenomenology · Physics 2007-05-23 J. L. Hewett

The approximate symmetry of the strong interactions under isospin transformations is among the most precise tools available to control hadronic matrix elements. It is crucial in extracting fundamental parameters, but also provides avenues…

High Energy Physics - Phenomenology · Physics 2015-12-16 Martin Jung

We study the indirect detection of dark matter when the local dark matter velocity distribution depends upon position, as expected for the Milky Way and its dwarf spheroidal satellites, and the annihilation cross-section is not purely…

High Energy Astrophysical Phenomena · Physics 2015-06-16 Francesc Ferrer , Daniel R. Hunter

One of the key motivations for supersymmetry is that it provides a natural candidate for dark matter. For a long time the density of this candidate particle fell within cosmological bounds across much of the SUSY parameter space. However…

High Energy Physics - Phenomenology · Physics 2007-06-04 J. P. Roberts