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Inflation and Invisible Axions

1988; American Physical Society; Volume: 60; Issue: 19 Linguagem: Inglês

10.1103/physrevlett.60.1899

1092-0145

Savas Dimopoulos, Lawrence J. Hall,

Particle physics theoretical and experimental studies

An era of inflation in the hot big bang can lead to a dilution of axions. Such a dilution removes the upper bound on ${f}_{A}$, the symmetry-breaking scale at which axions are produced. The dilution may occur during or just after inflation, but in either case there is a restriction on the reheat temperature of the Universe after inflation. Hence, such a scenario for an invisible axion requires baryogenesis to occur at a low temperature.