The Experts below are selected from a list of 294 Experts worldwide ranked by ideXlab platform
O. S. Khovanskaya - One of the best experts on this subject based on the ideXlab platform.
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Parameters of the Early Universe and primordial black holes
Astronomy Letters, 2002Co-Authors: S. O. Alexeyev, M. V. Sazhin, O. S. KhovanskayaAbstract:We consider the possibility of low-mass primordial black holes being formed in terms of the inflationary theory of the Early Universe. We found a condition on the reheating temperature under which the relic remnants of primordial black holes had been formed by now. These relic remnants may account for a part of the dark matter in our Universe.
S. O. Alexeyev - One of the best experts on this subject based on the ideXlab platform.
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Parameters of the Early Universe and primordial black holes
Astronomy Letters, 2002Co-Authors: S. O. Alexeyev, M. V. Sazhin, O. S. KhovanskayaAbstract:We consider the possibility of low-mass primordial black holes being formed in terms of the inflationary theory of the Early Universe. We found a condition on the reheating temperature under which the relic remnants of primordial black holes had been formed by now. These relic remnants may account for a part of the dark matter in our Universe.
M. V. Sazhin - One of the best experts on this subject based on the ideXlab platform.
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Parameters of the Early Universe and primordial black holes
Astronomy Letters, 2002Co-Authors: S. O. Alexeyev, M. V. Sazhin, O. S. KhovanskayaAbstract:We consider the possibility of low-mass primordial black holes being formed in terms of the inflationary theory of the Early Universe. We found a condition on the reheating temperature under which the relic remnants of primordial black holes had been formed by now. These relic remnants may account for a part of the dark matter in our Universe.
Johann Rafelski - One of the best experts on this subject based on the ideXlab platform.
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Connecting QGP-Heavy Ion Physics to the Early Universe
Nuclear Physics B - Proceedings Supplements, 2020Co-Authors: Johann RafelskiAbstract:We discuss properties and evolution of quark-gluon plasma in the Early Universe and compare to laboratory heavy ion experiments. We describe how matter and antimatter emerged from a primordial soup of quarks and gluons. We focus our discussion on similarities and differences between the Early Universe and the laboratory experiments.Comment: 8 pages, 1 figure, presented at SpacePart12 held at CERN, November 5-7 201
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Connecting QGP-Heavy Ion Physics to the Early Universe
arXiv: Cosmology and Nongalactic Astrophysics, 2013Co-Authors: Johann RafelskiAbstract:We discuss properties and evolution of quark-gluon plasma in the Early Universe and compare to laboratory heavy ion experiments. We describe how matter and antimatter emerged from a primordial soup of quarks and gluons. We focus our discussion on similarities and differences between the Early Universe and the laboratory experiments.
E Pierpaoli - One of the best experts on this subject based on the ideXlab platform.
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Early Universe models from noncommutative geometry
Advances in Theoretical and Mathematical Physics, 2010Co-Authors: Matilde Marcolli, E PierpaoliAbstract:We investigate cosmological predictions on the Early Universe based on the noncommutative geometry (NCG) models of gravity coupled to matter. Using the renormalization group analysis for the standard model with right-handed neutrinos and Majorana mass terms, which is the particle physics content of the most recent NCG models, we analyze the behavior of the coefficients of the gravitational and cosmological terms in the Lagrangian derived from the asymptotic expansion of the spectral action functional of NCG. We find emergent Hoyle–Narlikar and conformal gravity at the see-saw scales and a running effective gravitational constant, which affects the propagation of gravitational waves and the evaporation law of primordial black holes and provides Linde models of negative gravity in the Early Universe. The same renormalization group analysis also governs the running of the effective cosmological constant of the model. The model also provides a Higgs-based slow-roll inflationary mechanism, for which one can explicitly compute the slow-roll parameters. The particle physics content allows for dark matter models based on sterile neutrinos with Majorana mass terms.
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Early Universe models from noncommutative geometry
arXiv: High Energy Physics - Theory, 2009Co-Authors: Matilde Marcolli, E PierpaoliAbstract:We investigate cosmological predictions on the Early Universe based on the noncommutative geometry models of gravity coupled to matter. Using the renormalization group analysis for the Standard Model with right handed neutrinos and Majorana mass terms, which is the particle physics content of the most recent noncommutative geometry models, we analyze the behavior of the coefficients of the gravitational and cosmological terms in the Lagrangian derived from the asymptotic expansion of the spectral action functional of noncommutative geometry. We find emergent Hoyle-Narlikar and conformal gravity at the see-saw scales and a running effective gravitational constant, which affects the propagation of gravitational waves and the evaporation law of primordial black holes and provides Linde models of negative gravity in the Early Universe. The same renormalization group analysis also governs the running of the effective cosmological constant of the model. The model also provides a Higgs based slow-roll inflationary mechanism, for which one can explicitly compute the slow-roll parameters. The particle physics content allows for dark matter models based on sterile neutrinos with Majorana mass terms.
