Obviating PBH overproduction for SIGWs generated by pulsar timing arrays in loop corrected EFT of bounce
Year: 2024
Type: article
Abstract: In order to unravel the present situation of the PBH overproduction problem, our study emphasizes the critical role played by the equation of state (EoS) parameter w within the framework of effective field theory (EFT) of non-singular bounce. Our analysis focuses on a wide range of EoS parameter values that are still optimal for explaining the latest data from the pulsar timing array (PTA). As a result of our study, the most advantageous window, 0.31 ≤w≤ 1/3, is identified as the location of a substantial PBH abundance,fPBH∈ (10-3,1) with large mass PBHs,MPBH∼𝒪(10-7–10-3)M⊙, in the SIGW interpretation of the PTA signal. When confronted with PTA, we find that the overproduction avoiding circumstances are between 1σ-2σ, while the EoS parameter lies inside the narrow window, 0.31
Authors: Sayantan Choudhury, Siddhant Ganguly, Sudhakar Panda, Soumitra SenGupta, Pranjal Tiwari
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4402235561