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4901“…We study the growth of matter perturbations beyond the linear level in cosmologies in which the dark energy has a variable equation of state. …”
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info:eu-repo/semantics/article -
4902“…In particular, the non-Gaussianity may have a sharp cut-off and be very suppressed on large cosmological scales, but sizeable on small scales. This may have an impact on probes of non-Gaussianity in the large-scale structure and in the cosmic microwave background radiation anisotropies.…”
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info:eu-repo/semantics/article -
4903por Pretzl, Klaus P“…Cryogenic devices are widely used in double beta decay experiments, in cosmological dark matter searches, in x-ray detection of galactic and extragalactic objects as well as in cosmic background radiation experiments. …”
Publicado 2000
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4904por Van Hooydonk, G“…It is not necessary to look for large scale anti-matter domains at distances Mpc away or at the cosmological horizon.…”
Publicado 2000
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4905por Pauli, Wolfgang“…Pauli writes about Jordan's cosmological equations. Pauli thinks that Einstein's model is simpler and more convincing. …”
Publicado 2000
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4906“…Finally, we estimate the baryon to cold dark matter ratio in a cosmological scenario in which Q-balls are responsible for both the net baryon number of the Universe and its dark matter. …”
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4907por Tomaschitz, R“…A pre-relativistic cosmological approach to electromagnetism and gravitation is explored that leads to a cosmic time variation of the fundamental constants. …”
Publicado 2000
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4908“…We scan the possible values of potential parameters for which the cosmological parameters are within the allowed range by observations. …”
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4909por Ng, Y. Jack“…Generalizing the discussion for a static spacetime region to the cosmos, we find a component of dark energy (resembling an effective positive cosmological constant of the correct magnitude) in the current epoch of the universe. …”
Publicado 2019
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4910Publicado 2004“…Central focus will be on various versions of the "brane world" scenario, some of which suggest that extra dimensions may be accessible experimentally in foreseeable future, either at colliders or in searches for exotica. Cosmological aspects will also be discussed…”
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4911por Ellis, Jonathan Richard“…Motivations for expecting supersymmetry to appear at energies <or approximately=1 TeV are reviewed, and it is emphasized that the lightest supersymmetric particle is an ideal candidate for cold dark matter. Experimental and cosmological constraints on supersymmetric dark matter are reviewed, and the prospects for indirect or direct detection are discussed. …”
Publicado 2001
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4912por Cline, James M.“…It has been suggested that a 1/R addition to the gravitational Lagrangian could be the source of the observed late-time cosmological acceleration. By itself this term is ruled out by constraints on scalar-tensor gravity, but the addition of extra contributions of the form R^p makes it possible to evade these constraints. …”
Publicado 2003
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4913“…In this letter, we propose a new cosmological scenario where the Higgs chemical potential mediates asymmetries between visible and dark matter sectors, either generating a baryon asymmetry from a dark matter asymmetry or vice-versa. …”
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4914“…This proof applies to all cosmological solutions -- to the whole phase space. However, in a more realistic situation, when one includes any matter which is not directly coupled to the Galileon, there always exists a region of phase space where these perturbations propagate superluminally, indeed with arbitrarily high speed. …”
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4915por Giovannini, Massimo“…The quasinormal mode of a gravitating and magnetized fluid in a spatially flat, isotropic and homogeneous cosmological background is derived in the presence of the fluid sources of anisotropic stress and of the entropic fluctuations of the plasma. …”
Publicado 2014
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4916“…It is found that the renormalization of the cosmological constant due to the scalar field fluctuations vanishes identically in one dimension. …”
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4917“…We discuss several aspects of the cosmological evolution of moduli fields in heterotic string/M-theory scenarios. …”
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4918“…The values of the right-handed neutrino masses predicted by soft leptogenesis can be low enough to evade the cosmological gravitino problem.…”
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4919“…Furthermore, a straightforward calculation of the cosmic relic density of neutralinos ($\chi$) gives $\Omega_\chi h^2\gg1$ for most of the allowed parameter space in this model, although small regions may still be cosmologically acceptable. We finally discuss how the {\it no-scale flipped $SU(5)$ supergravity model} avoids naturally the above troubles and thus constitutes a good candidate for the low-energy effective supergravity model.…”
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4920“…There are important differences with conventional supergravity models: the goldstino has components along the higgsino direction; SU(2) x U(1) breaking occurs already at the classical level; the scales m_{3/2} and m_Z, the gauge couplings, the lightest Higgs mass and the cosmological constant are entirely determined by quantum corrections.…”
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