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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
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‘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
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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 ...
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QCD equation of state and dark matter [PDF]
, 2012 The QCD equation of state is not often discussed in cosmology. However, the relic density of weakly interacting massive particles (WIMPs) depends on the entropy and the expansion rate of the Universe when they freeze out, at a temperature in the range ...
Philipsen, Owe +3 more
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Astronomy & AstrophysicsThe nature of dark energy remains one of the most profound mysteries in modern cosmology. One intriguing proposal is that black holes (BHs) could be the astrophysical source of dark energy through a cosmological coupling mechanism, and strong evidence ...
Lei Lei +4 more
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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
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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
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Dark matter from dark photons: A taxonomy of dark matter production [PDF]
Physical Review D, 2019 18 pages, 14 ...
Thomas Hambye +3 more
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Brazilian Community Report on Dark Matter
, 2019 Brazilian Community Report on Dark Matter This white paper summarizes the activities of the Brazilian community concerning dark matter physics and highlights the importance of financial support to Brazilian groups that are deeply involved in ...
Brazilian Community Report on Dark Matter
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Black hole evaporation beyond the Standard Model of particle physics
Journal of High Energy Physics, 2023 The observation of an evaporating black hole would provide definitive information on the elementary particles present in nature. In particular, it could discover or exclude particles beyond those present in the standard model of particle physics.
Michael J. Baker, Andrea Thamm
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