TY - JOUR T1 - Cosmological and High-Energy Physics Implications from Gravitational-Wave Background Searches in LIGO-Virgo-KAGRA’s O1–O4a Runs JO - Physical Review X UR - https://doi.org/10.1103/dlfv-z6m2 PY - 2026/10/22 AU - Abac AG AU - Abouelfettouh I AU - Acernese F AU - Ackley K AU - Adamcewicz C AU - Adhicary S AU - Adhikari D AU - Adhikari N AU - Adhikari RX AU - Adkins VK AU - Afroz S et al ED - DO - DOI: 10.1103/dlfv-z6m2 PB - American Physical Society (APS) VL - 16 IS - 4 Y2 - 2026/10/30 ER -