Results 21 to 30 of about 214,465 (268)
The Possibility of Mirror Planet as Planet Nine in the Solar System
Universe, 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
Brazilian 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
One-Minute Quasi-Periodic Pulsations during an M-Class Solar Flare
Universe, 2022 We study the Quasi-Periodic Pulsations (QPPs) of an M4.4 class solar flare, which occurred in active region NOAA 11165 on 8 March 2011. With the Fast Fourier Transform (FFT) method, we decompose the flare light curve into fast- and slowly-varying ...
Fanpeng Shi, Dong Li, Zongjun Ning
doaj +1 more source
DARK MATTER INTERFERENCE [PDF]
Modern 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
‘Excess’ of primary cosmic ray electrons
Physics Letters B, 2015 With the accurate cosmic ray (CR) electron and positron spectra (denoted as Φe− and Φe+, respectively) measured by AMS-02 Collaboration, the difference between the electron and positron fluxes (i.e., ΔΦ=Φe−−Φe+), dominated by the propagated primary ...
Xiang Li +7 more
doaj +1 more source
Physics Letters B, 2019 The paper brings a novel approach to unification of dark matter and dark energy in terms of a cosmic fluid. A model is introduced in which the cosmic fluid speed of sound squared is defined as a function of its equation of state (EoS) parameter. It is shown how logarithmic part of this function results in dynamical regimes previously not observed in ...
Dalibor Perković, Hrvoje Štefančić
openaire +3 more sources
Journal of High Energy Physics, 2017 46 pages, 22 figures.
Thomas Jubb +2 more
openaire +6 more sources
Dark matter from a dark connection [PDF]
Modern 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
Convergent Bayesian global fits of 4D composite Higgs models
Journal of High Energy Physics, 2021 Models in which the Higgs boson is a composite pseudo-Nambu-Goldstone boson offer attractive solutions to the Higgs mass naturalness problem. We consider three such models based on the minimal SO(5) → SO(4) symmetry breaking pattern, and perform ...
Ethan Carragher +6 more
doaj +1 more source
THE DARK-MATTER WORLD: ARE THERE DARK-MATTER GALAXIES? [PDF]
International Journal of Modern Physics: Conference Series, 2012 We attempt to answer whether neutrinos and antineutrinos, such as those in the cosmic neutrino background, would clusterize among themselves or even with other dark-matter particles, under certain time span, say 1 Gyr. With neutrino masses in place, the similarity with the ordinary matter increases and so is our confidence for neutrino clustering if ...
openaire +2 more sources