Two-loop scalar self-mass during inflation
By T. Brunier, V. Onemli, Richard P. Woodard. 2004
153 citations recorded by the source corpus.
We work in the locally de Sitter background of an inflating universe and consider a massless, minimally coupled scalar with a quartic self-interaction. We use dimensional regularization to compute the fully renormalized scalar self-mass-squared at one- and two-loop order for a state which is released in Bunch–Davies vacuum at t = 0. Although the field strength and coupling constant renormalizations are identical to those of flat space, the geometry induces a non-zero mass renormalization. The finite part also shows a sort of growing mass that competes with the classical force in eventually turning off this system's super-acceleration.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/4cf5abbc556449e47a0bb081805ca153c06debb7
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In Astronomy and Astrophysics
In Nuclear and High Energy Physics
Citations in the corpus
- Super-Hubble de Sitter fluctuations and the dynamical RG (2009, background): “[37] which discusses large infrared logarithms in a time-dependent situation, and argues, following a proposal of Starobinsky and Yokoyama [21], that these may be resummed [38] using ideas from stochastic inflation.”