Results 31 to 40 of about 178,552 (314)
Cosmological parameters from SDSS and WMAP [PDF]
, 2003 We measure cosmological parameters using the three-dimensional power spectrum P(k) from over 200,000 galaxies in the Sloan Digital Sky Survey (SDSS) in combination with WMAP and other data.
Max Tegmark +37 more
semanticscholar +1 more source
The Cosmological Constant and Dark Energy [PDF]
, 2002 Physics invites the idea that space contains energy whose gravitational effect approximates that of Einstein's cosmological constant, Lambda: nowadays the concept is termed dark energy or quintessence.
P. Peebles, Bharat Ratra
semanticscholar +1 more source
COSMOLOGICAL ZITTERBEWEGUNG [PDF]
International Journal of Modern Physics D, 2013 We describe a new phenomenon of zitterbewegung of a free Dirac particle in cosmological spacetimes. Unlike the similar effect theorized by Schrödinger in 1930, the cosmological zitterbewegung is a real, physically attainable effect, which originates from the mixing of positive and negative frequency modes of a field operator in cosmological spacetimes.
Girdhar, Parth, Kobakhidze, Archil
openaire +2 more sources
Baryogenesis at a lepton-number-breaking phase transition
Journal of High Energy Physics, 2017 We study a scenario in which the baryon asymmetry of the universe arises from a cosmological phase transition where lepton-number is spontaneously broken.
Andrew J. Long +2 more
doaj +1 more source
Cosmological parameters from CMB and other data: A Monte Carlo approach [PDF]
, 2002 We present a fast Markov chain Monte Carlo exploration of cosmological parameter space. We perform a joint analysis of results from recent cosmic microwave background ~CMB!
A. Lewis, S. Bridle
semanticscholar +1 more source
simba: Cosmological simulations with black hole growth and feedback [PDF]
Monthly notices of the Royal Astronomical Society, 2019 We introduce the Simba simulations, the next generation of the Mufasa cosmological galaxy formation simulations run with Gizmo's meshless finite mass hydrodynamics.
R. Dav'e +5 more
semanticscholar +1 more source
Physical Review D, 1995 An exploratory study of the cosmology of moduli in string theory. Moduli are argued to be natural inflaton fields and lead to a robust inflationary cosmology in which inflation takes place at the top of domain walls. The amplitude of microwave background fluctuations constrains the dynamics responsible for inflation to take place at a higher scale than
Banks, T. +4 more
openaire +3 more sources
DECOHERENCE IN QUANTUM COSMOLOGY AND THE COSMOLOGICAL CONSTANT [PDF]
Modern Physics Letters A, 2013 We discuss a spacetime having the topology of S3×ℝ but with a different smoothness structure. The initial state of the cosmos in our model is identified with a wildly embedded 3-sphere (or a fractal space). In previous work we showed that a wild embedding is obtained by a quantization of a usual (or tame) embedding.
Asselmeyer-Maluga, T., Krol, J.
openaire +2 more sources
Coherent elastic neutrino-nucleus scattering at the European Spallation Source
Journal of High Energy Physics, 2020 The European Spallation Source (ESS), presently well on its way to completion, will soon provide the most intense neutron beams for multi-disciplinary science.
D. Baxter +14 more
doaj +1 more source