NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Nuclear and particle physics in the early universeBasic principles and implications of Big Bang cosmology are reviewed, noting the physical evidence of a previous universe temperature of 10,000 K and theoretical arguments such as grand unification decoupling indicating a primal temperature of 10 to the 15th eV. The Planck time of 10 to the -43rd sec after the Big Bang is set as the limit before which gravity was quantized and nothing is known. Gauge theories of elementary particle physics are reviewed for successful predictions of similarity in weak and electromagnetic interactions and quantum chromodynamic predictions for strong interactions. The large number of photons in the universe relative to the baryons is considered and the grand unified theories are cited as showing the existence of baryon nonconservation as an explanation. Further attention is given to quark-hadron phase transition, the decoupling for the weak interaction and relic neutrinos, and Big Bang nucleosynthesis.
Document ID
19820042548
Document Type
Conference Proceedings
Authors
Schramm, D. N. (Chicago, University Chicago, IL, United States)
Date Acquired
August 10, 2013
Publication Date
January 1, 1981
Subject Category
ASTROPHYSICS
Meeting Information
Nuclear astrophysics(Erice)
Funding Number(s)
CONTRACT_GRANT: NSG-7212
CONTRACT_GRANT: NSF AST-78-20402
Distribution Limits
Public
Copyright
Other