Results 71 to 80 of about 536,719 (375)
Journal of High Energy Physics, 2018 Macroscopic nuggets of quark matter were proposed several decades ago as a candidate for dark matter. The formation of these objects in the early universe requires the QCD phase transition to be first order — a requirement that is not satisfied in the ...
Yang Bai, Andrew J. Long
doaj +1 more source
Dark matter from torsion in Friedmann cosmology
European Physical Journal C: Particles and Fields, 2022 A cosmological model in an Einstein–Cartan framework endowed with torsion is studied. For a torsion function assumed to be proportional to Hubble expansion function, namely $$\phi =-\alpha H$$ ϕ = - α H , the contribution of torsion function as a dark ...
S. H. Pereira +3 more
doaj +1 more source
, 2009 The talk at international conference in honor of Ya. B. Zeldovich 95th Anniversary, Minsk, Belarus, April 2009. The talk represents a review of the old results and contemporary development on the problem of cosmological singularity.Comment: to appear in ...
Belinski, V.
core +1 more source
Improved cosmological constraints from a joint analysis of the SDSS-II and SNLS supernova samples [PDF]
, 2014 Aims. We present cosmological constraints from a joint analysis of type Ia supernova (SN Ia) observations obtained by the SDSS-II and SNLS collaborations.
M. Betoule +71 more
semanticscholar +1 more source
A Test of the Cosmological Principle with Quasars [PDF]
, 2020 We study the large-scale anisotropy of the universe by measuring the dipole in the angular distribution of a flux-limited, all-sky sample of 1.36 million quasars observed by the Wide-field Infrared Survey Explorer (WISE).
N. Secrest +5 more
semanticscholar +1 more source
The Cosmological Optical Theorem [PDF]
Journal of Cosmology and Astroparticle Physics, 2020 The unitarity of time evolution, or colloquially the conservation of probability, sits at the heart of our descriptions of fundamental interactions via quantum field theory. The implications of unitarity for scattering amplitudes are well understood, for
H. Goodhew, Sadra Jazayeri, E. Pajer
semanticscholar +1 more source
‘Turkeys Cannot Vote for Christmas’: Why Epistemic Disobedience in an Anti‐Black World Matters
Australian Journal of Social Issues, EarlyView.ABSTRACT Never in the history of global coloniality has the idea of epistemic disobedience been as important as in the 21st century. This is not only because the struggle for decolonisation has shifted from physical confrontation between the coloniser and the colonised into a battle of ideas but also because the former has deployed the idea of ...
Morgan Ndlovu
wiley +1 more source
Is there evidence for additional neutrino species from cosmology?
, 2013 It has been suggested that recent cosmological and flavor-oscillation data favor the existence of additional neutrino species beyond the three predicted by the Standard Model of particle physics.
Feeney, Stephen M. +2 more
core +1 more source
Journal of High Energy Physics, 2019 Abstract We show that the potential of Nambu-Goldstone bosons can have two or more local minima e.g. at antipodal positions in the vacuum manifold. This happens in many models of composite Higgs and of composite Dark Matter. Trigonometric potentials lead to unusual features, such as symmetry non-restoration at high temperature.
Di Luzio L. +3 more
openaire +6 more sources