arXiv:2306.17022·v2·High Energy Physics — Phenomenology
Footprints of Axion-Like Particle in Pulsar Timing Array Data and James Webb Space Telescope Observations
Shu-Yuan Guo🇨🇳 · Maxim Khlopov🇷🇺 · Xuewen Liu🇨🇳 · Lei Wu🇨🇳 · Yongcheng Wu🇨🇳 · Bin Zhu🇨🇳
Abstract
Several Pulsar Timing Array (PTA) collaborations have recently reported the evidence for a stochastic gravitational-wave background (SGWB), which can unveil the formation of primordial seeds of inhomogeneities in the early universe. With the SGWB parameters inferred from PTAs data, we can make a prediction of the seeds for early galaxy formation from the domain walls in the axion-like particles (ALPs) field distribution. This also naturally provides a solution to the observation of high redshifts by the James Webb Space Telescope. The predicted photon coupling of the ALP is within the reach of future experimental searches.
Comments: 9 pages, 4 figures. version published in Sci. China-Phys. Mech. Astron. November 2024 Vol.67 No.11: 111011