Alpha-attractor quintessential inflation models are disfavored by DESI observations and Delta Neff limits from gravitational waves, as they predict an inconsistent scalar spectral index when the gravitational-wave abundance is constrained.
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Reanalysis of CAPP-12T axion data sets 90% CL limits on HFGW strain down to 3.9e-21 at 5.311 GHz and excludes certain 10^{-6} solar mass black holes within 0.01 AU via superradiance interpretation.
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DESI and Gravitational Wave Constraints Challenge Quintessential {\alpha}-Attractor Inflation
Alpha-attractor quintessential inflation models are disfavored by DESI observations and Delta Neff limits from gravitational waves, as they predict an inconsistent scalar spectral index when the gravitational-wave abundance is constrained.
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Search for high-frequency gravitational waves via re-analysis of cavity axion data
Reanalysis of CAPP-12T axion data sets 90% CL limits on HFGW strain down to 3.9e-21 at 5.311 GHz and excludes certain 10^{-6} solar mass black holes within 0.01 AU via superradiance interpretation.