George Lazarides
Published 2020-05-14Version 1
The early stages of the universe evolution are discussed according to the hot big bang model and the grand unified theories. The shortcomings of big bang are summarized and their resolution by inflationary cosmology is sketched. Cosmological inflation, the subsequent oscillation and decay of the inflaton field, and the resulting reheating of the universe are studied in some detail. The density perturbations produced by inflation and the temperature fluctuations of the cosmic microwave background radiation are introduced. Baryogenesis via non-thermal leptogenesis is analyzed and dark energy and matter in the universe are presented. Quantum gravity and string theory are very briefly introduced. The problem of initial conditions for inflation is discussed in the light of string theory and the possibly detectable primordial gravity waves from inflation are mentioned.
Comments: 23 pages, talk presented in the "Corfu Summer Institute 2019: School and Workshops on Elementary Particle Physics and Gravity (CORFU2019)", 31 August - 25 September 2019, Corfu, Greece, to appear in the proceedings. arXiv admin note: text overlap with arXiv:hep-ph/0607032, arXiv:hep-ph/0204294, arXiv:hep-ph/0111328
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Neutrinos as a signature of ultrahigh energy photons at high red shift
Initial conditions for evolution of double parton distributions
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