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We explore some of the consequences of Dark Matter-photon interactions on structure formation, focusing on the evolution of cosmological perturbations and performing both an analytical and a numerical study. We compute the cosmic microwave…

Astrophysics · Physics 2009-11-07 Celine Boehm , Alain Riazuelo , Steen H. Hansen , Richard Schaeffer

I discuss theoretical issues related to the top mass measurements in hadronic collisions.

High Energy Physics - Phenomenology · Physics 2018-01-22 Paolo Nason

We study the freeze-in of gravitationally interacting dark matter in extra dimensions. Focusing on a minimal dark matter candidate that only interacts with the SM via gravity in a five-dimensional model we find that a large range of dark…

High Energy Physics - Phenomenology · Physics 2023-04-26 Arturo de Giorgi , Stefan Vogl

We study the structure of compact objects that contain non-self annihilating, self-interacting dark matter admixed with ordinary matter made of neutron star and white dwarf materials. We extend the previous work Phys. Rev. D 92 123002…

General Relativity and Quantum Cosmology · Physics 2019-05-15 Maksym Deliyergiyev , Antonino Del Popolo , Laura Tolos , Morgan Le Delliou , Xiguo Lee , Fiorella Burgio

We consider the impact of relaxing some typical assumptions about dark matter interactions, including isospin-invariance, elastic scattering and contact interactions. We show that detection strategies with neutrino detectors, gamma-ray…

High Energy Physics - Phenomenology · Physics 2015-06-11 Jason Kumar

A search is presented for dark matter produced in association with a hadronically decaying W or Z boson using 3.2 /fb of pp collisions at $\sqrt{s}$=13 TeV recorded by the ATLAS detector at the Large Hadron Collider. Events with a hadronic…

High Energy Physics - Experiment · Physics 2016-11-18 ATLAS Collaboration

Based on Maxwellian quaternionic electromagnetic theory, the electromagnetic interaction, gravitational interaction and their coupling influence with the dark matter field in octonionic space are discussed. The research results disclose the…

Classical Physics · Physics 2009-10-28 Zihua Weng

In ultrarelativistic heavy ion collisions the produced high temperature, high energy density state will cross different phases of the strongly interacting matter. The original idea of quark-gluon plasma formation has been evolved and the…

Nuclear Theory · Physics 2009-11-11 P. Levai

We have re-investigated Cosmology involving interaction between Dark matter and Dark Energy in the light of a new parametrization. The new parametrization is based on the hypothesis that when Dark matter and Dark Energy will interact, Dark…

Cosmology and Nongalactic Astrophysics · Physics 2023-09-20 Arkajit Aich

A cosmological model of dark energy interacting with dark matter and another general component of the universe is investigated. We found general constraints on these models imposing an accelerated expansion. The same is also studied in the…

High Energy Physics - Phenomenology · Physics 2008-11-26 Norman Cruz , Samuel Lepe , Francisco Pena

We consider the possibility that dark matter can communicate with the Standard Model fields via flavor interactions. We take the dark matter to belong to a "dark sector" which contains at least two types, or "flavors", of particles and then…

High Energy Physics - Phenomenology · Physics 2011-09-15 Jennifer Kile , Amarjit Soni

We describe the model-independent mechanism by which dark matter and dark matter structures heavier than $\sim 8\times 10^{11}$ GeV form binary pairs in the early Universe that spin down and merge both in the present and throughout the…

High Energy Physics - Phenomenology · Physics 2023-08-29 Melissa D. Diamond , David E. Kaplan , Surjeet Rajendran

We discuss how to formulate a quantum field theory of dark energy interacting with dark matter. We show that the proposals based on the assumption that dark matter is made up of heavy particles with masses which are very sensitive to the…

High Energy Physics - Theory · Physics 2017-03-09 Guido D'Amico , Teresa Hamill , Nemanja Kaloper

We propose a mechanism of elementary thermal dark matter with mass up to $10^{14}$ GeV, within a standard cosmological history, whose relic abundance is determined solely by its interactions with the Standard Model, without violating the…

High Energy Physics - Phenomenology · Physics 2019-11-13 Hyungjin Kim , Eric Kuflik

Many of the open questions beyond the Standard Model will be addressed by the LHC, including the origin of mass, supersymmetry, dark matter and the possibility of large extra dimensions. A linear e+ e- collider (LC) with sufficient…

High Energy Physics - Phenomenology · Physics 2009-09-11 John Ellis

We investigate the possibility that the observed behavior of test particles outside galaxies, which is usually explained by assuming the presence of dark matter, is the result of the dynamical evolution of particles in higher dimensional…

General Relativity and Quantum Cosmology · Physics 2009-04-21 M. E. Kahil , T. Harko

The two dark sectors of the universe - dark matter and dark energy - may interact with each other. Background and linear density perturbation evolution equations are developed for a generic coupling. We then establish the general conditions…

Cosmology and Nongalactic Astrophysics · Physics 2010-05-25 M. B. Gavela , D. Hernandez , L. Lopez Honorez , O. Mena , S. Rigolin

In this paper, we explore a scenario where the dark matter is a mixture of interacting and non interacting species. Assuming dark matter-photon interactions for the interacting species, we find that the suppression of the matter power…

Cosmology and Nongalactic Astrophysics · Physics 2020-02-05 Julia Stadler , Celine Bœhm , Olga Mena

Dark matter is the name assigned to one of the most important contemporary challenges that fundamental physics research is facing. In recent years, the hypothesis that dark matter might be "light" is gaining interest. Following this idea,…

High Energy Physics - Phenomenology · Physics 2022-01-10 P. Achenbach , L. Doria , M. Battaglieri

Dark matter interactions with massless or very light Standard Model particles, as photons or neutrinos, may lead to a suppression of the matter power spectrum at small scales and of the number of low mass haloes. Bounds on the dark matter…

Cosmology and Nongalactic Astrophysics · Physics 2019-01-30 Laura Lopez-Honorez , Olga Mena , Pablo Villanueva-Domingo