EREP 2026, Spanish & Portuguese Relativity Meeting

Cosmological and High Energy Physics implications from gravitational-wave background searches in LIGO-Virgo-KAGRA's O1-O4a runs

28 May 2026, 09:30

1h

Universidad de Murcia, Campus de la Merced (Murcia, Spain)

Invited talk

Speaker

Prof. Sakellariadou, Maria (King's College Londom)

Description

I will summarise the results of the LIGO-Virgo-KAGRA paper arXiv:2510.26848 [gr-qc]
In this paper we derive gravitational-wave background energy density upper limits from the O1-O4a data to constrain parameters associated with various possible processes in the early Universe: first-order phase transitions, cosmic strings, domain walls, stiff equation of state, axion inflation, second-order scalar perturbations, primordial black hole binaries, and parity violation.