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Footprints of Axion-Like Particle in Pulsar Timing Array Data and James Webb Space Telescope Observations
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Footprints of Axion-Like Particle in Pulsar Timing Array Data and James Webb Space Telescope Observations
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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.
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