The recent detection of a stochastic signal in the NANOGrav 15-year dataset has aroused
great interest in uncovering its origin. However, the evidence for the Hellings-Downs …

Recently, multiple pulsar timing array collaborations have presented compelling evidence
for a stochastic signal at nanohertz frequencies, potentially originating from cosmic strings …

Pulsar timing arrays (PTAs) have revealed galaxy-size gravitational waves (GWs) in the form
of a stochastic gravitational wave background (SGWB), correlating the radio pulses emitted …

Space-based gravitational wave detection is based on the astrodynamical equations
derived from gravitational theory to detect changes in distance between spacecraft/celestial …

We discuss E 6 based extensions of the Standard Model (SM) containing two varieties of
superheavy metastable cosmic strings (CSs) that respectively have neutral and electrically …

The recent compelling observation of the nanohertz stochastic gravitational wave
background has brought to light a new galactic arena to test gravity. In this paper, we derive …

In a recent paper (Phys. Rev. D 108 (2023) 095053), we have demonstrated that the 2023
PTA results, which hint at a stochastic gravitational wave (GW) background at nanohertz …

We consider F-term hybrid inflation (FHI) and SUSY breaking in the context of a B− L
extension of the MSSM that largely respects a global U (1) R symmetry. The hidden sector …

The null energy condition (NEC) is a fundamental principle in general relativity, and its
violation could leave discernible signatures in gravitational waves (GWs). A violation of the …

We present the discovery ofA Big Ring on the Sky'(BR), the second ultra-large-scale
structure (uLSS) found in MgII-absorber catalogues, following the previously reported Giant …