English

Galileon inflation evades the no-go for PBH formation in the single-field framework

Cosmology and Nongalactic Astrophysics 2023-08-31 v2 General Relativity and Quantum Cosmology High Energy Physics - Phenomenology High Energy Physics - Theory

Abstract

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.

Keywords

Cite

@article{arxiv.2304.04065,
  title  = {Galileon inflation evades the no-go for PBH formation in the single-field framework},
  author = {Sayantan Choudhury and Sudhakar Panda and M. Sami},
  journal= {arXiv preprint arXiv:2304.04065},
  year   = {2023}
}

Comments

45 pages, 2 figures, Comments are welcome, Revised version accepted for publication in JCAP