Various pulsar timing array (PTA) experiments (NANOGrav, EPTA, PPTA, CPTA, including
data from InPTA) very recently reported evidence for excess red common-spectrum signals …

We discuss the interpretation of the detected signal by pulsar timing array (PTA)
observations as a gravitational wave background of cosmological origin. We combine …

A bstract In recent years, several pulsar timing array collaborations have reported first hints
for a stochastic gravitational wave background at nano-Hertz frequencies. Here we …

Models that produce axionlike particles (ALPs) after cosmological inflation due to
spontaneous U (1) symmetry breaking also produce cosmic-string networks. Those axionic …

Supermassive black hole binaries source gravitational waves measured by Pulsar Timing
Arrays. The frequency spectrum of this stochastic background is predicted more precisely …

In this paper, we analyse sound waves arising from a cosmic phase transition where the full
velocity profile is taken into account as an explanation for the gravitational wave spectrum …

The stochastic gravitational-wave background is imprinted on the times of arrival of radio
pulses from millisecond pulsars. Traditional pulsar timing analyses fit a timing model to each …

We study the effect of an ultralight primordial black hole (PBH) dominated phase on the
gravitational wave (GW) spectrum generated by a cosmic string (CS) network formed as a …

Scale-invariant extensions of the electroweak theory are not only attractive because they
can dynamically generate the weak scale, but also due to their role in facilitating …

A bstract In type I seesaw models, the right-handed neutrinos are typically super-heavy,
consistent with the generation of baryon asymmetry via standard leptogenesis. Primordial …