Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2003-03-18
Physics
High Energy Physics
High Energy Physics - Phenomenology
15 pages, 6 figures, LaTeX, uses ws-procs975x65.cls (included). Invited Plenary Talk at the international colloquium on TIME A
Scientific paper
With the recent measurements of temperature and polarization anisotropies in the microwave background by WMAP, we have entered a new era of precision cosmology, with the cosmological parameters of a Standard Cosmological Model determined to 1%. This Standard Model is based on the Big Bang theory and the inflationary paradigm, a period of exponential expansion in the early universe responsible for the large-scale homogeneity and spatial flatness of our observable patch of the Universe. The spectrum of metric perturbations, seen in the microwave background as temperature anisotropies, were produced during inflation from quantum fluctuations that were stretched to cosmological size by the expansion, and later gave rise, via gravitational collapse, to the observed large-scale structure of clusters and superclusters of galaxies. Furthermore, the same theory predicts that all the matter and radiation in the universe today originated at the end of inflation from an explosive production of particles that could also have been the origin of the present baryon asymmetry, before the universe reached thermal equilibrium at a very large temperature. From there on, the universe cooled down as it expanded, in the way described by the standard hot Big Bang model.
No associations
LandOfFree
The evolution of the Universe does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The evolution of the Universe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The evolution of the Universe will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-118591