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We investigate the possibility that Dark Matter (dm) could be made of scalar candidates and focus, in particular, on the unusual mass range between a few MeV's and a few GeV's. After showing why the Lee-Weinberg limit (which usually forbids…

High Energy Physics - Phenomenology · Physics 2009-09-29 C. Boehm , P. Fayet

We explore the possibility that weakly interacting dark matter can form bound states - WIMPonium. Such states are expected in a wide class of models of particle dark matter, including some limits of the Minimal Supersymmetric Standard…

High Energy Physics - Phenomenology · Physics 2014-11-18 William Shepherd , Tim M. P. Tait , Gabrijela Zaharijas

New strong dynamics at the energy scale ~ 1 TeV is an attractive and elegant theoretical ansatz for the origin of electroweak symmetry breaking. We review here the theoretical models for strong dynamics, particularly, technicolor theories…

High Energy Physics - Phenomenology · Physics 2009-10-31 Pushpalatha Bhat , Estia Eichten

Dark Matter (DM) detection prospects at future e+e- colliders are reviewed under the assumption that DM particles are fermions of the Majorana or Dirac type. Although the discussion is quite general, one will keep in mind the recently…

High Energy Physics - Experiment · Physics 2014-11-04 Francois Richard , Giorgio Arcadi , Yann Mambrini

We study a scalar singlet dark matter (DM) having mass in sub-TeV regime by extending the minimal scalar singlet DM setup by additional vector like fermions. While the minimal scalar singlet DM satisfies the relic and direct detection…

High Energy Physics - Phenomenology · Physics 2020-11-04 Debasish Borah , Rishav Roshan , Arunansu Sil

We discuss the possibility of realising a two-component dark matter (DM) scenario where the two DM candidates differ from each other by virtue of their production mechanism in the early universe. One of the DM candidates is thermally…

High Energy Physics - Phenomenology · Physics 2019-11-13 Debasish Borah , Arnab Dasgupta , Sin Kyu Kang

We explore the properties of self-conjugate dark matter (DM) particles that predominantly interact with Standard Model electroweak gauge bosons, using an effective field theory approach. The study emphasizes effective contact interactions,…

High Energy Physics - Phenomenology · Physics 2025-06-06 Hrishabh Bharadwaj

We present updated constraints on 'light' Dark Matter (DM) particles with masses between 1 MeV and 5 GeV. In this range, we can expect DM-produced $e^\pm$ pairs to up-scatter low-energy ambient photons in the Milky Way via the Inverse…

High Energy Physics - Phenomenology · Physics 2024-01-17 Jordan Koechler

We lay out a comprehensive physics case for a future high-energy muon collider, exploring a range of collision energies (from 1 to 100 TeV) and luminosities. We highlight the advantages of such a collider over proposed alternatives. We show…

We explore the connection between Dark Matter and neutrinos in a model inspired by radiative Type-II seessaw and scotogenic scenarios. In our model, we introduce new electroweakly charged states (scalars and a vector-like fermion) and…

High Energy Physics - Phenomenology · Physics 2021-06-16 Roberto A. Lineros , Mathias Pierre

We introduce a model of dark matter (DM) where the DM is a composite of a spontaneously broken conformal field theory. The DM is a thermal relic with its abundance determined by the freeze-out of annihilations to dilatons, the Goldstone…

High Energy Physics - Phenomenology · Physics 2023-09-13 Steven Ferrante , Ameen Ismail , Seung J. Lee , Yunha Lee

We compute the decay spectrum for dark matter (DM) with masses above the scale of electroweak symmetry breaking, all the way to the Planck scale. For an arbitrary hard process involving a decay to the unbroken standard model, we determine…

High Energy Physics - Phenomenology · Physics 2021-07-07 Christian W. Bauer , Nicholas L. Rodd , Bryan R. Webber

We examine cosmological, astrophysical and collider constraints on thermal dark matter (DM) with mass mX in the range 1 MeV to 10 GeV. Cosmic microwave background (CMB) observations, which severely constrain light symmetric DM, can be…

High Energy Physics - Phenomenology · Physics 2012-12-12 Tongyan Lin , Hai-Bo Yu , Kathryn M. Zurek

We consider the sensitivity of fixed-target neutrino experiments at the luminosity frontier to light stable states, such as those present in models of MeV-scale dark matter. To ensure the correct thermal relic abundance, such states must…

High Energy Physics - Phenomenology · Physics 2015-03-19 Patrick deNiverville , Maxim Pospelov , Adam Ritz

In this work, we provide a comprehensive study of fermion-portal dark matter models in the freeze-in regime at a future muon collider. For different possible non-singlet fermion portals, we calculate the upper bound on the mediator's mass…

High Energy Physics - Phenomenology · Physics 2024-12-20 Pouya Asadi , Samuel Homiller , Aria Radick , Tien-Tien Yu

Dark Matter (DM) comprising particles in the mass range of a few MeV to GeV is waiting to be explored, given the many theoretical models accommodating cosmological abundance. We hereby propose an experiment with the LHC proton beam of 7 TeV…

High Energy Physics - Experiment · Physics 2016-09-04 Ashok Kumar , Archana Sharma

We investigate self-conjugate Dark Matter (DM) particles that primarily interact with standard model electroweak gauge bosons within an effective field theoretical framework. Our analysis focuses on effective contact interactions, invariant…

High Energy Physics - Phenomenology · Physics 2024-06-21 Ekata Singh , Hrishabh Bharadwaj , Devisharan

We consider a minimal extension of the Standard Model (SM), which leads to unification of the SM coupling constants, breaks electroweak symmetry dynamically by a new strongly coupled sector and leads to novel dark matter candidates. In this…

High Energy Physics - Phenomenology · Physics 2015-06-16 Kimmo Kainulainen , Kimmo Tuominen , Jussi Virkajärvi

We introduce the gluequark Dark Matter candidate, an accidentally stable bound state made of adjoint fermions and gluons from a new confining gauge force. Such scenario displays an unusual cosmological history where perturbative freeze-out…

High Energy Physics - Phenomenology · Physics 2019-03-27 Roberto Contino , Andrea Mitridate , Alessandro Podo , Michele Redi

Ultralight dark photons are compelling dark matter candidates, but their allowed kinetic mixing with the Standard Model photon is severely constrained by requiring that the dark photons do not collapse into a cosmic string network in the…

High Energy Physics - Phenomenology · Physics 2025-08-20 David Cyncynates , Zachary J. Weiner