Results 21 to 30 of about 647,754 (283)
Neutrino oscillations in the early Universe [PDF]
, 2001 We discuss the oscillations effects on neutrinos in the early Universe and update the cosmological constraints on the oscillation parameters. It is shown that sterile LOW solution to the solar neutrino problem is almost completely excluded from ...
Abazajian +20 more
core +3 more sources
Horndeski model in nonlinearly realized supergravity
Journal of High Energy Physics, 2019 We construct the Horndeski Lagrangian within non-linearly realized super- gravity. We will show that the bosonic part of the Horndeski Lagrangian can be realized. Gravitino naturally couples to Horndeski sector in a super-covariant way.
Yusuke Yamada, Jun’ichi Yokoyama
doaj +1 more source
Pattern Formation in the Early Universe [PDF]
, 2000 Systems that exhibit pattern formation are typically driven and dissipative. In the early universe, parametric resonance can drive explosive particle production called preheating.
Parry, M., Sornborger, A.
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Higgs as heavy-lifted physics during inflation
Journal of High Energy Physics, 2019 Signals of heavy particle production during inflation are encoded as nonanalytic momentum scaling in primordial non-Gaussianity. These non-analytic signatures can be sourced by Standard Model particles with a modified Higgs scale uplifted by the slow ...
Yi-Peng Wu
doaj +1 more source
Particle asymmetries in the early universe [PDF]
, 2010 The total lepton asymmetry $l=\sum_f l_f$ in our universe is only poorly constrained by theories and experiments. It might be orders of magnitudes larger than the observed baryon asymmetry $b\simeq {\cal O}(10^{-10})$, $|l|/b \leq {\cal O}(10^{9})$.
Boeckel +19 more
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Precision early universe cosmology from stochastic gravitational waves
Journal of High Energy Physics, 2022 The causal tail of stochastic gravitational waves can be used to probe the energy density in free streaming relativistic species as well as measure g * (T) and beta functions β(T) as a function of temperature.
Dawid Brzeminski +2 more
doaj +1 more source
Extra Dimensions in the Early Universe [PDF]
, 1999 We investigate the possible occurrence of extra spatial dimensions (D = 3+epsilon) in the early universe. A detailed calculation is presented which shows that the crucial signal is the apparent inequality of the cosmological Z-term between matching Lyman
Douglas J. Buettner +4 more
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Glimpses into the early Universe
, 2009 This contribution gives a brief overview of the theoretical ideas underlying our current understanding of the early Universe. Confronting the predictions of the early Universe models with cosmological observations, in particular of the cosmic microwave ...
Langlois, David
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Protostar Formation in the Early Universe [PDF]
, 2008 The nature of the first generation of stars in the Universe remains largely unknown. Observations imply the existence of massive primordial stars early in the history of the universe, and the standard theory for the growth of cosmic structure predicts ...
Hernquist, Lars +2 more
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, 1998 I explore some consequences of Milgrom's modified dynamics for cosmology. There appear to be two promising tests for distinguishing MOND from CDM: (1) the rate of growth of structure and (2) the baryon fraction. These should be testable with observations
McGaugh, Stacy
core +2 more sources