Results 21 to 30 of about 2,875,148 (209)

Dark Matter [PDF]

open access: yesBrazilian Journal of Physics, 2011
Abstract I give a review of the development of the concept of dark matter. The dark matter story passed through several stages from a minor observational puzzle to a major challenge for theory of elementary particles. Modern data suggest that dark matter is the dominant matter component in the Universe, and that it consists of some ...
openaire   +6 more sources

Dark Matter [PDF]

open access: yesIndo-European Linguistics, 2015
The assumption of a root *√k̑u̯el ‘dark, black’ offers new possible etymologies for Arm. šaɫax, Gk. πηλός, Toch. B kwele, Hitt. kuu̯aliu-, Gk. κύλα, Lat. culex, and Lat. color, whose derivational background will be dealt with in the course of this paper.
openaire   +4 more sources

Limits on spin-dependent WIMP-proton cross-sections using the DRIFT-IId directional dark matter detector [PDF]

open access: yes, 2011
The nature of dark matter remains one of the biggest questions in physics today. Weakly Interacting Massive Particles (WIMPs) are a particularly well motivated candidate for the missing matter that makes up 85% of the mass of the Universe.
Pipe, Mark
core   +4 more sources

DARK MATTER INTERFERENCE [PDF]

open access: yesModern Physics Letters A, 2012
We study different patterns of interference in WIMP-nuclei elastic scattering that can accommodate the DAMA and CoGeNT experiments via an isospin violating ratio fn/fp = -0.71. We study interference between the following pairs of mediators: Z and Z′, Z′ and Higgs, and two Higgs fields. We show under what conditions interference works.
Del Nobile, Eugenio   +3 more
openaire   +2 more sources

Dark matter from a dark connection [PDF]

open access: yesModern Physics Letters A, 2021
In the first part of this note, we observe that a non-Riemannian piece in the affine connection (a “dark connection”) leads to an algebraically determined, conserved, symmetric 2-tensor in the Einstein field equations that is a natural dark matter candidate. The only other effect it has, is through its coupling to standard model fermions via covariant
Das, Ranit, Krishnan, Chethan
openaire   +3 more sources

Energy-releasing Process for the 2013 May 13 X1.7 Limb Flare: A Continued Study

open access: yesThe Astrophysical Journal, 2023
In this paper, we reanalyze the X1.7 class limb flare that occurred on 2013 May 13 (SOL2013-05-13T01:56 UT), concentrating on the energy-releasing process using microwave observations mainly made by Nobeyama and X-ray observations made by RHESSI.
Jinhua Shen   +5 more
doaj   +1 more source

A real triplet-singlet extended Standard Model: dark matter and collider phenomenology

open access: yesJournal of High Energy Physics, 2021
We examine the collider and dark matter phenomenology of the Standard Model extended by a hypercharge-zero SU(2) triplet scalar and gauge singlet scalar.
Nicole F. Bell   +4 more
doaj   +1 more source

An r−process macronova/kilonova in GRB 060614: evidence for the merger of a neutron star-black hole binary

open access: yesEPJ Web of Conferences, 2016
After the jet break at t ~ 1.4 days, the optical afterglow emission of the long-short burst GRB 060614 can be divided into two components. One is the power-law decaying forward shock afterglow emission.
Jin Zhi-Ping, Fan Yi-Zhong, Wei Da-Ming
doaj   +1 more source

The Possibility of Mirror Planet as Planet Nine in the Solar System

open access: yesUniverse, 2022
A series of dynamical anomalies in the orbits of distant trans-Neptunian objects points to a new celestial body (usually named Planet Nine) in the solar system.
Pei Wang   +4 more
doaj   +1 more source

Charming dark matter [PDF]

open access: yesJournal of High Energy Physics, 2017
46 pages, 22 figures.
Thomas Jubb   +2 more
openaire   +6 more sources

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