Cosmology and elementary-particle physics

Details Cosmology and elementary-particle physics Cosmology and elementary-particle physics

Sep 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979pht....32i..42t&link_type=abstract

Physics Today, vol. 32, Sept. 1979, p. 42-48.

Physics

Big Bang Cosmology, Elementary Particle Interactions, Galactic Evolution, Thermodynamics, Graphs (Charts), Helium, Hydrogen, Lithium, Universe

Scientific paper

Great progress has been made recently in two diverse areas of physics, cosmology and elementary-particle physics. In spite of the obvious differences of the two fields, each has begun to illuminate the other, making possible interdisciplinary studies. For example, the cosmological abundance of He-4 fixes an upper limit of 8 on the number of quark varieties ('flavors') in models that have a symmetry between quarks and leptons. In addition, developments in the grand unified theories of elementary processes may resolve the puzzle of why there are roughly a billion photons for every baryon in the universe.

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