Author:
Bezerra-Sobrinho J.,Medeiros L.G.
Abstract
Abstract
In the context of effective theories of gravity, a minimalist bottom-up
approach which takes into account 1-loop quantum corrections leads to
modifications in the Einstein-Hilbert action through the inclusion of four
extra terms: R
2, CκραβCκραβ
,
R ln (□) R and Cκραβ
ln(□) Cκραβ
. The first two terms are necessary
to guarantee the renormalizability of the gravitational theory, and the last
two terms (nonlocal terms) arise from the integration of massless/light matter
fields. This work aims to analyze how one of the nonlocal terms, namely
R ln(□) R, affects the Starobinsky inflation. We
consider the nonlocal term as a small correction to the R
2 term, and we
demonstrate that the model behaves like a local model in this context. In
addition, we show that the approximate model in the Einstein frame is
described by a canonical scalar field minimally coupled to general relativity.
Finally, we study the inflationary regime of this model and constrain its free
parameters through observations of CMB anisotropies.
Subject
Astronomy and Astrophysics
Cited by
2 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献