Many symmetry breaking patterns in grand unified theories (GUTs) give rise to cosmic
strings that eventually decay when pairs of GUT monopoles spontaneously nucleate along …

Motivated by the NANOGrav 15 year data and other recent investigations of stochastic
gravitational background radiation based on pulsar timing arrays, we show how superheavy …

We show that, when connected with monopoles, the flat D-flat direction breaking the local U
(1) BL symmetry as an extension of the minimal supersymmetric standard model can be …

A bstract We explore a variety of composite topological structures that arise from the
spontaneous breaking of SO (10) to SU (3) c× U (1) em via one of its maximal subgroups SU …

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 …

A bstract We consider a minimal non-supersymmetric SO (10) Grand Unified Theory (GUT)
model that can reproduce the observed fermionic masses and mixing parameters of the …

We investigate the inflationary cosmology involving an SU (5) GUT (grand unified theory)
singlet scalar with nonminimal coupling to the Ricci scalar. In this scenario the scale of …

In this work, for the first time in literature, we study the predictions of non-minimally coupled
Natural and Coleman-Weinberg potentials in the n sr plane, and an extended ΛCDM model …

We study stochastic gravitational waves from cosmic strings generated in an ultraviolet-
complete model for pseudo-Nambu-Goldstone dark matter with a hidden ${U (1)} $ gauge …

A bstract Motivated by the direct discovery of gravitational waves (GWs) from black holes
and neutron stars, there is a growing interest in investigating GWs from other sources …