hadron era | is followed by lepton era | ![2001-09-27 09:29:58.0 2001-09-27 09:29:58.0](facet.gif) |
has density ρ = 1093 g cm-3 | ![has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:29:58.0 has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:29:58.0](facet.gif) |
has duration 10-5 s | ![2001-09-27 09:29:58.0 2001-09-27 09:29:58.0](facet.gif) |
has synonym hadron barrier | ![2001-09-27 09:29:58.0 2001-09-27 09:29:58.0](facet.gif) |
is preceded by Planck era | ![2001-09-27 09:29:58.0 2001-09-27 09:29:58.0](facet.gif) |
has start time 10-43 s after Big Bang | ![2001-09-27 09:29:58.0 2001-09-27 09:29:58.0](facet.gif) |
has definition The Big Bang era when the Universe was matter-dominated, containing many hadrons in equilibrium with the radiation field and when kT ≈ mπ. The hadron era ended when the characteristic photon energy fell below the rest mass of a pion or π-meson (270 electron masses), and very few hadrons remained (about one hadron for every 108 photons). | ![has source: Silk, J. 1990 The Big Bang, W. H. Publishers, New York, 2001-09-27 09:29:58.0 has source: Silk, J. 1990 The Big Bang, W. H. Publishers, New York, 2001-09-27 09:29:58.0](facet.gif) |
has definition The Big Bang era during which quantum and general-relativistic effects are expected to modify each other in an unknown way. | ![has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:29:58.0 has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:29:58.0](facet.gif) |
is a kind of Big Bang era | ![2001-09-27 09:29:58.0 2001-09-27 09:29:58.0](facet.gif) |
Big Bang era | has temperature | ![2001-09-27 09:29:57.0 2001-09-27 09:29:57.0](facet.gif) |
event | has time of occurrence | ![2001-09-27 09:29:57.0 2001-09-27 09:29:57.0](facet.gif) |