Results 11 to 20 of about 1,123,493 (287)
A theory of dark energy that matches dark matter [PDF]
Physics Essays, 36(2) 149-159 (2023), 2023 In this paper, a theory of dark energy is proposed that matches dark matter. The relativistic quantum mechanics equations reveal that free particles can have negative energies. We think that the negative energy is the dark energy which behaviors as dark photons with negative energies.
arxiv +1 more source
The Astrophysical Journal, 2023 We perform a rigorous cosmology analysis on simulated Type Ia supernovae (SNe Ia) and evaluate the improvement from including photometric host galaxy redshifts compared to using only the “ z _spec ” subset with spectroscopic redshifts from the host or SN.
Ayan Mitra +4 more
doaj +1 more source
DARK ENERGY WITH DARK SPINORS [PDF]
Modern Physics Letters A, 2010 Ever since the first observations that we are living in an accelerating universe, it has been asked what dark energy is. There are various explanations, all of which have various drawbacks or inconsistencies. Here we show that using a dark spinor field it is possible to have an equation of state that crosses the phantom divide, becoming a dark phantom
James Burnett, Christian G. Böhmer
openaire +4 more sources
Dark energy and dark matter [PDF]
Physics Letters B, 2003 4 pages latex, 2 ...
COMELLI, DANIELE +2 more
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Characterizing the Sample Selection for Supernova Cosmology
The Open Journal of Astrophysics, 2021 Type Ia supernovae (SNe Ia) are used as distance indicators to infer the cosmological parameters that specify the expansion history of the universe. Parameter inference depends on the criteria by which the analysis SN sample is selected.
Alex G. Kim +1 more
doaj +1 more source
Physical Review D, 2020 We present a novel source of dark energy, which is motivated by the prevalence of hidden sectors in string theory models and is consistent with all of the proposed swampland conjectures. Thermal effects hold a light hidden sector scalar at a point in field space that is not a minimum of its zero temperature potential.
Edward Hardy, Susha Parameswaran
openaire +4 more sources
Dark Vector Mesons at LHC Forward Detector Searches [PDF]
, 2023 Confining gauge dynamics in dark sector is promising to provide dark matter with a mass in the range of sub-GeV to GeV. These dark sectors consist of composite particles, such as dark baryons and dark mesons, that are neutral under the standard-model charge.
arxiv +1 more source
A comparison of optimisation algorithms for high-dimensional particle and astrophysics applications
Journal of High Energy Physics, 2021 Optimisation problems are ubiquitous in particle and astrophysics, and involve locating the optimum of a complicated function of many parameters that may be computationally expensive to evaluate.
The DarkMachines High Dimensional Sampling Group +20 more
doaj +1 more source
On dark matter and dark energy
Литьë и металлургия, 2020 The dark matter hypothesis was created to explain the reason for the preservation of stellar clusters from dispersion. The weak point of this hypothesis is the great age of space, which is 13.8 billion years.
V. Yu. Stetsenko, A. V. Stetsenko
doaj +1 more source