Haloscope Mass Coverage of the ADMX Search and the Prior a Bounce Places on the Axion Mass

The band from 6.50e-01 to 8.00e+00 GHz corresponds to masses from 2.69e+00 to 3.31e+01 micro-electronvolts. At 1 GHz the implied decay constant is 1.38e+12 GeV, with a DFSZ coupling of 6.29e-16 per GeV and a KSVZ coupling larger by a factor of 2.57e+00, at 1.62e-15 per GeV. Every mass in the band corresponds to an oscillation temperature deep in the radiation era, far below the bounce ceiling set by the bound density of 9.72e+54 g per cubic centimetre, so the ceiling reorders nothing inside the band. The post-inflationary preference for tens of micro-electronvolts therefore stands or falls with crossover physics, not with the bounce. This study is computed from stated assumptions and published comparison values; it is not a measurement.