Combining ACT DR6, SPT-3G D1, and Planck CMB data tightens the 95% upper limits on primordial oscillation amplitudes to about 0.029, with no significant signal.
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Tightening constraints on primordial oscillations with latest ACT and SPT data
Combining ACT DR6, SPT-3G D1, and Planck CMB data tightens the 95% upper limits on primordial oscillation amplitudes to about 0.029, with no significant signal.