Big bang nucleosynthesis and physics beyond the standard model

摘要: The Hubble expansion of galaxies, the 2.73 K black-body radiation background and cosmic abundances light elements argue for a hot, dense origin universe - standard big bang cosmology enable its evolution to be traced back fairly reliably nucleosynthesis era when temperature was O(1) MeV corresponding an age s. All particles, known hypothetical, would have been created at higher temperatures in early analyses their possible effects on synthesized many interesting constraints obtained particle properties. These arguments usefully complemented laboratory experiments guiding attempts extend physics beyond model, incorporating ideas such as supersymmetry, compositeness unification. We first present pedagogical account relativistic primordial nucleosynthesis, discussing both theoretical observational aspects, then proceed examine detail, particular those pertaining new massless particles massive unstable particles. Finally, section aimed physicists, we illustrate applications models physics.