Loop Corrections to Standard Model Fields in Inflation

TL;DR

This paper computes one-loop quantum corrections to Standard Model fields during inflation, addressing late-time divergences and demonstrating their resummation into finite results, advancing our understanding of particle physics in the early universe.

Contribution

It introduces a method to handle late-time divergences in loop corrections for Standard Model fields during inflation using dynamical renormalization group techniques.

Findings

Late-time divergences can be resummed into finite results.

Loop corrections are computed for spin-0, 1/2, and 1 fields during inflation.

This work paves the way for studying Standard Model and new physics in the early universe.

Abstract

We calculate 1-loop corrections to the Schwinger-Keldysh propagators of Standard-Model-like fields of spin-0, 1/2, and 1, with all renormalizable interactions during inflation. We pay special attention to the late-time divergences of loop corrections, and show that the divergences can be resummed into finite results in the late-time limit using dynamical renormalization group method. This is our first step toward studying both the standard model and new physics in the primordial universe.