Results 61 to 70 of about 41,122 (294)
Advances in High Energy Physics, 2017 We investigate matter creation processes during the reheating period of the early Universe, by using the thermodynamic of open systems. The Universe is assumed to consist of the inflationary scalar field, which, through its decay, generates relativistic ...
Juntong Su +2 more
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Scalar field dark matter in clusters of galaxies [PDF]
, 2016 One alternative to the cold dark matter (CDM) paradigm is the scalar field dark matter (SFDM) model, which assumes dark matter is a spin-0 ultra-light scalar field (SF) with a typical mass $m\sim10^{-22}\mathrm{eV}/c^2$ and positive self-interactions ...
T. Bernal, V. Robles, T. Matos
semanticscholar +1 more source
The continuous tower of scalar fields as a system of interacting dark matter–dark energy
Physics Letters B, 2015 This paper aims to introduce a new parameterisation for the coupling Q in interacting dark matter and dark energy models by connecting said models with the Continuous Tower of Scalar Fields model.
Paulo Santos
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interplay between black holes and ultralight dark matter: analytic solutions
Journal of High Energy Physics, 2023 Dark matter (DM) can consist of a scalar field so light that DM particles in the galactic halo are best described by classical waves. We investigate how these classical solutions are influenced by the presence of a non-rotating supermassive black hole at
Bruno Bucciotti, Enrico Trincherini
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Bose-Einstein-condensed scalar field dark matter and the gravitational wave background from inflation: New cosmological constraints and its detectability by LIGO [PDF]
, 2016 We consider an alternative cold dark matter candidate, ultralight bosons ($m>10^{-22}$eV) described by a complex scalar field (SFDM) with global U(1) symmetry, with comoving particle number density conserved after particle production during standard ...
Bohua Li, P. Shapiro, T. Rindler-Daller
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The Open Journal of Astrophysics, 2021 We apply the squeezed state formalism to scalar field dark matter (e.g. axion) perturbations generated during inflation. As for the inflationary perturbations, the scalar field state becomes highly squeezed as modes exit the horizon. For as long as $H>m_\
Jondalar L. J. Kuß, David J. E. Marsh
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Is Dark Matter a BEC or Scalar Field? [PDF]
Journal of the Korean Physical Society, 2009 This is a brief review on the history of the Bose-Einstein condensate (BEC) or boson star model of galactic dark matter halos, where ultra-light scalar dark matter particles condense in a single BEC quantum state. The halos can be described as a self-gravitating, possibly self-interacting, coherent scalar field.
openaire +2 more sources
Oscillating scalar-field dark matter in supergravity [PDF]
Journal of High Energy Physics, 2001 We show that an oscillating scalar field in supergravity of mass of the order of $\sim$ TeV with a nonzero vacuum expectation value ($\sim 10^{10}$ GeV) can be a candidate of cold dark matter (CDM). To avoid the gravitino problem, we need a low reheating temperature after the primordial inflation.
Seto, Osamu +2 more
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Is Sextans dwarf galaxy in a scalar field dark matter halo? [PDF]
, 2014 The Bose-Einstein condensate/scalar field dark matter model, considers that the dark matter is composed by spinless-ultra-light particles which can be described by a scalar field. This model is an alternative model to the Λ-cold dark matter paradigm, and
V. Lora, J. Magaña
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Effects of dark matter on the spontaneous scalarization in neutron stars
European Physical Journal C: Particles and FieldsDark matter, an important portion of compact objects, can influence different phenomena in neutron stars. The spontaneous scalarization in the scalar-tensor gravity has been proposed for neutron stars.
Fahimeh Rahimi, Zeinab Rezaei
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