Galileon inflation evades the no-go for PBH formation in the single-field framework
Choudhury S. Panda S. Sami M.
1 August 2023Institute of Physics
Journal of Cosmology and Astroparticle Physics
2023#2023Issue 8
We consider Galileon inflation in the Effective Field Theory (EFT) framework and examine the possibility for PBH formation during slow roll (SR) to ultra slow roll (USR) transitions. We show that loop corrections to the power spectrum, in this case, do not impose additional constraints on the masses of PBHs produced. We indicate that the remarkable non-renormalization property of Galileans due to generalized shift symmetry dubbed as Galilean symmetry is responsible for protecting PBH formation from quantum loop corrections.
cosmological perturbation theory , inflation , physics of the early universe , primordial black holes
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Centre For Cosmology and Science Popularization (CCSP), SGT University, Haryana Delhi- NCR, Gurugram, 122505, India
School of Physical Sciences, National Institute of Science Education and Research, Odisha, Bhubaneswar, 752050, India
Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai, 400085, India
Center for Theoretical Physics, Eurasian National University, Astana, 010008, Kazakhstan
Chinese Academy of Sciences, 52 Sanlihe Rd, Xicheng District, Beijing, China
Centre For Cosmology and Science Popularization (CCSP)
School of Physical Sciences
Homi Bhabha National Institute
Center for Theoretical Physics
Chinese Academy of Sciences
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