Particle dark matter: Evidence, candidates and constraints
TLDR
The current status of particle dark matter, including experimental evidence and theoretical motivations, including direct and indirect detection techniques, is discussed in this paper. But the authors focus on neutralinos in models of supersymmetry and Kaluza-Klein dark matter in universal extra dimensions.About:
This article is published in Physics Reports.The article was published on 2005-01-01 and is currently open access. It has received 4614 citations till now. The article focuses on the topics: Warm dark matter & Light dark matter.read more
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Dark matter annihilation effects on the first stars
Fabio Iocco,Alessandro Bressan,Alessandro Bressan,E. Ripamonti,Raffaella Schneider,Andrea Ferrara,Paola Marigo +6 more
Abstract: We study the effects of WIMP dark matter (DM) on the collapse and evolution of the first stars in the Universe. Using a stellar evolution code, we follow the pre-Main Sequence (MS) phase of a grid of metal-free stars with masses in the range 5-600 solar mass forming in the centre of a 1e6 solar mass halo at redhisft z=20. DM particles of the parent halo are accreted in the proto-stellar interior by adiabatic contraction and scattering/capture processes, reaching central densities of order 1e12 GeV/cm3 at radii of the order of 10 AU. Energy release from annihilation reactions can effectively counteract the gravitational collapse, in agreement with results from other groups. We find this stalling phase (known as "dark" star) is transients and lasts from 2.1e3 yr (M=600 solar mass) to 1.8e4 yr (M=9 solar mass). Later in the evolution, DM scattering/capture rate becomes high enough that energy deposition from annihilations significantly alters the pre-MS evolution of the star in a way that depends on DM (i) velocity dispersion, (ii) density, (iii) elastic scattering cross section with baryons. For our fiducial set of parameters (10 km/s, 1e11 GeV/cm3, 1e-38 cm2) we find that the evolution of stars of mass lower than 40 solar masses "freezes" on the HR diagram before reaching the ZAMS. Stars with bigger masses manage to ignite nuclear reactions; however, DM "burning" prolonges their lifetimes by a factor 2 (5) for a 600 (40) solar mass star.
Journal ArticleDOI
The gamma-ray-flux PDF from galactic halo substructure
TL;DR: In this paper, the gamma-ray-flux probability distribution function (PDF) was proposed as a probe of substructure in the Galactic halo, which can detect substructure on the smallest micro-halo mass scales.
Journal ArticleDOI
Revealing dark matter substructure with anisotropies in the diffuse gamma-ray background
TL;DR: In this article, the angular power spectrum of the gamma-ray emission from dark matter was calculated for several models of the subhalo population and features in the power spectrum can be used to infer the presence of substructure.
Journal ArticleDOI
Soft L_e-L_mu-L_tau flavour symmetry breaking and sterile neutrino keV Dark Matter
TL;DR: In this article, a flavour symmetry that is softly broken leads to keV sterile neutrinos, which are a prime candidate for Warm Dark Matter, which is to the best of our knowledge the first model where flavour symmetries are applied simultaneously to active and sterile neutrons explaining at the same time active neutrino properties.
Journal ArticleDOI
The calibration and electron energy reconstruction of the BGO ECAL of the DAMPE detector
Zhiyong Zhang,Chi Wang,J. Dong,Yifeng Wei,Sicheng Wen,Yunlong Zhang,Zhiying Li,Changqing Feng,Shanshan Gao,Zhongtao Shen,Deliang Zhang,Junbin Zhang,Qi Wang,Siyuan Ma,Di Yang,Di Jiang,Deng-Yi Chen,Yi-Ming Hu,Guangshun Huang,Xiaolian Wang,Z. Z. Xu,Shubin Liu,Qi An,Yizhong Gong +23 more
TL;DR: In this article, the BGO electromagnetic calorimeter (ECAL) is used for energy measurement in the DArk Matter Particle Explorer (DAMPE) space experiment.
References
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First year Wilkinson Microwave Anisotropy Probe (WMAP) observations: Determination of cosmological parameters
David N. Spergel,Licia Verde,Hiranya V. Peiris,Eiichiro Komatsu,M. R. Nolta,Charles L. Bennett,Mark Halpern,Gary Hinshaw,N. Jarosik,Alan J. Kogut,Michele Limon,Michele Limon,S. S. Meyer,Lyman A. Page,Gregory S. Tucker,Gregory S. Tucker,Gregory S. Tucker,Janet L. Weiland,Edward J. Wollack,Edward L. Wright +19 more
TL;DR: In this article, the authors find that the emerging standard model of cosmology, a flat -dominated universe seeded by a nearly scale-invariant adiabatic Gaussian fluctuations, fits the WMAP data.
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Large Mass Hierarchy from a Small Extra Dimension
TL;DR: In this paper, the weak scale is generated from the Planck scale through an exponential hierarchy, but this exponential arises not from gauge interactions but from the background metric, which is a slice of spacetime.
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The Structure of cold dark matter halos
TL;DR: In this article, high-resolution N-body simulations show that the density profiles of dark matter halos formed in the standard CDM cosmogony can be fit accurately by scaling a simple universal profile.
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The Early Universe
Edward W. Kolb,Michael S. Turner +1 more
TL;DR: In this article, the Robertson-Walker Metric is used to measure the radius of the Planck Epoch in the expanding universe, which is a measure of the number of atoms in the universe.
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The Hierarchy problem and new dimensions at a millimeter
TL;DR: In this paper, the authors propose a new framework for solving the hierarchy problem which does not rely on either supersymmetry or technicolor, and they take as the only fundamental short distance scale in nature.
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