Automaticity, axion invisibility and cosnological baryosynthesis

Details Automaticity, axion invisibility and cosnological baryosynthesis Automaticity, axion invisibility and cosnological baryosynthesis

Jun 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983nuphb.219...41f&link_type=abstract

Nuclear Physics B, Volume 219, Issue 1, p. 41-60.

Physics

Nuclear Physics

1

Scientific paper

We explore the reconciliation between solution of the strong CP problem by the invisible axion technique and the successful qualitative explanation of the baryon number of the universe from grand unification. Imposition of Peccei-Quinn symmetry can make the baryon asymmetry too small, if the dominant mechanism is decay of superheavy scalars. We show that grand unified models with automatic axion invisibility can avoid this difficulty. In particular a three-family SU(7) model gives an acceptable fourth-order contribution to baryon asymmetry. The requirement of sufficient baryosybthesis suggests how the light families of fermions must be assigned to representations of SU(7). The role of superheavy fermions is also discussed.

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