Dark matter from an ultra-light pseudo-Goldsone-boson

  title={Dark matter from an ultra-light pseudo-Goldsone-boson},
  author={Luca Amendola and Riccardo Barbieri},
  journal={Physics Letters B},
Cosmologically probing ultra-light particle dark matter using 21 cm signals
There can arise ubiquitous ultra-light scalar fields in the Universe, such as the pseudo-Goldstone bosons from the spontaneous breaking of an approximate symmetry, which can make a partial
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Constraining the mass of light bosonic dark matter using SDSS Lyman-α forest
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Ultra-high energy extragalactic neutrinos interacting with ultra-light dark matter
We show the results and discussions of the study of a possible suppression of the extragalactic neutrino flux during its propagation due to a nonstandard interaction with a candidate field to dark
Constraining the nature of ultra light dark matter particles with the 21 cm forest
The ultra-light scalar fields can arise ubiquitously, for instance, as a result of the spontaneous breaking of an approximate symmetry such as the axion and more generally the axion-like particles.
Ultra-light dark matter in ultra-faint dwarf galaxies
Cold Dark Matter (CDM) models struggle to match the observations at galactic scales. The tension can be reduced either by dramatic baryonic feedback effects or by modifying the particle physics of
Probing ultra-light axions with the 21-cm Signal during Cosmic Dawn
Ultra-light axions (ULAs) are a promising and intriguing set of dark-matter candidates. We study the prospects to use forthcoming measurements of 21-cm fluctuations from cosmic dawn to probe ULAs. We
Constraining ultralight axions with galaxy surveys
Ultralight axions and other bosons are dark matter candidates present in many high energy physics theories beyond the Standard Model. In particular, the string axiverse postulates the existence of up


Fuzzy cold dark matter: the wave properties of ultralight particles.
These problems might be solved, and the virtues of CDM models retained, even without postulating ad hoc dark matter particle or field interactions, if the dark matter is composed of ultralight scalar particles initially in a (cold) Bose-Einstein condensate, similar to axion dark matter models.
Evolving Dark Energy with w =/ -1
Theories of evolving quintessence are constructed that generically lead to deviations from the w = -1 prediction of non-evolving dark energy. The small mass scale that governs evolution, m_\phi
Neutrino mass and dark energy from weak lensing.
Focusing on the radial information contained in a future deep 4000 deg(2) survey, it is found that the expected (1-sigma) error on a neutrino mass is 0.1 eV, if the dark-energy parameters are allowed to vary.
Linear Power Spectra in Cold + Hot Dark Matter Models: Analytical Approximations and Applications
This paper presents simple analytic approximations to the linear power spectra, linear growth rates, and rms mass fluctuations for both components in a family of cold + hot dark matter (CDM+HDM)
Model-dependent axion as quintessence with almost massless hidden sector quarks
A pseudo-Goldstone boson for quintessence is known to require the decay constant Fq ~ MP and the height of the potential (0.003 eV)4, and hence the pseudo-Goldstone boson mass of order 10−33 eV. The
The collisionless damping of density fluctuations in an expanding universe
The best candidate for the dark matter is a massive collisionless non-baryonic relic of the early universe. The most natural type of initial density fluctuations expected are of the adiabatic rather
Inferring the dark matter power spectrum from the Lyman α forest in high-resolution QSO absorption spectra
We use the LUQAS sample, a set of 27 high-resolution and high signal-to-noise ratio quasi-stellar object (QSO) absorption spectra at a median redshift of z = 2.25, and the data from Croft et al. at a
String or M theory axion as a quintessence
A slow-rolling scalar field ($Q\equiv$ Quintessence) with potential energy $V_Q\sim (3\times 10^{-3} {\rm eV})^4$ has been proposed as the origin of accelerating universe at present. We investigate