The symmetry breaking of grand unified gauge groups in the early Universe often leaves
behind relic topological defects such as cosmic strings, domain walls, or monopoles. For …

A bstract The recent results from the Pulsar Timing Array (PTA) collaborations show the first
evidence for the detection of a stochastic background of gravitational waves at the nHz …

We analyze the classically scale-invariant BL model in the context of resonant leptogenesis
with the recently proposed mass-gain mechanism. The BL symmetry breaking in this …

We propose a new method toward distinguishing the Dirac versus Majorana nature of
neutrino masses from the spectrum of gravitational waves (GWs) associated with neutrino …

Motivated by the recent release of new results from five different pulsar timing array (PTA)
experiments claiming to have found compelling evidence for primordial gravitational waves …

We propose a new way of probing the nonthermal origin of baryon asymmetry of the
Universe (BAU) and dark matter (DM) from evaporating primordial black holes (PBHs) via …

A bstract The Standard Model, extended with three right-handed (RH) neutrinos, is the
simplest model that can explain light neutrino masses, the baryon asymmetry of the …

We study the properties of the stochastic gravitational-wave background (SGWB) produced
by domain walls (DWs) during inflation without forming a network. We numerically simulate …

We study the early Universe evolution of axion-like particle (ALP) domain walls taking into
account the effect of friction from particles in the surrounding plasma, including the case of …

A bstract We discuss the damping of inflationary gravitational waves (GW) that re-enter the
horizon before or during an epoch, where the energy budget of the universe is dominated by …