Large logarithms from quantum gravitational corrections to a massless, minimally coupled scalar on de Sitter

0567179 - FZÚ 2023 RIV US eng J - Journal Article
Glavan, Dražen - Miao, S.P. - Prokopec, T. - Woodard, R.P.
Large logarithms from quantum gravitational corrections to a massless, minimally coupled scalar on de Sitter.
Journal of High Energy Physics. Roč. 2022, č. 3 (2022), č. článku 088. ISSN 1029-8479. E-ISSN 1029-8479
R&D Projects: GA ČR(CZ) GA20-28525S
Institutional support: RVO:68378271
Keywords : effective field theories * models of quantum gravity * cosmology of theories beyond the SM * renormalization group
OECD category: Particles and field physics
Impact factor: 5.4, year: 2022
Method of publishing: Open access

We consider single graviton loop corrections to the effective field equation of a massless, minimally coupled scalar on de Sitter background in the simplest gauge. We find a large temporal logarithm in the approach to freeze-in at late times, but no correction to the feeze-in amplitude. We also find a large spatial logarithm (at large distances) in the scalar potential generated by a point source, which can be explained using the renormalization group with one of the higher derivative counterterms regarded as a curvature-dependent field strength renormalization. We discuss how these results set the stage for a project to purge gauge dependence by including quantum gravitational corrections to the source which disturbs the effective field and to the observer who measures it.
Permanent Link: https://hdl.handle.net/11104/0338460