Quest for CMB spectral distortions to probe the scalar-induced gravitational wave background interpretation of pulsar timing array data

Matteo Tagliazucchi, Matteo Braglia, Fabio Finelli +1

Gravitational Waves (GW) sourced by second-order primordial curvature fluctuations are among the favored models fitting the recent pulsar timing array (PTA) measurement of a stocha…