Explaining large electromagnetic logarithms from loops of inflationary gravitons

0575984 - FZÚ 2024 RIV DE eng J - Článek v odborném periodiku
Glavan, Dražen - Miao, S.P. - Prokopec, T. - Woodard, R.P.
Explaining large electromagnetic logarithms from loops of inflationary gravitons.
Journal of High Energy Physics. Roč. 2023, č. 8 (2023), č. článku 195. ISSN 1029-8479. E-ISSN 1029-8479
Grant CEP: GA MŠMT(CZ) EH22_010/0002906
Institucionální podpora: RVO:68378271
Klíčová slova: de Sitter space * renormalization group
Obor OECD: Particles and field physics
Impakt faktor: 5.4, rok: 2022
Způsob publikování: Open access

Recent progress on nonlinear sigma models on de Sitter background has permitted the resummation of large inflationary logarithms by combining a variant of Starobinsky’s stochastic formalism with a variant of the renormalization group. We reconsider single graviton loop corrections to the photon wave function, and to the Coulomb potential, in light of these developments. Neither of the two 1-loop results have a stochastic explanation, however, the flow of a curvature-dependent field strength renormalization explains their factors of ln(a). We speculate that the factor of ln(Hr) in the Coulomb potential should not be considered as a leading logarithm effect.
Trvalý link: https://hdl.handle.net/11104/0348538