BROWSE

Related Scientist

kamada,ayuki's photo.

kamada,ayuki
순수물리이론연구단
more info

ITEM VIEW & DOWNLOAD

Lessons from T-mu(mu) on inflation models: Two-scalar theory and Yukawa theory

Cited 0 time in webofscience Cited 0 time in scopus
415 Viewed 0 Downloaded
Title
Lessons from T-mu(mu) on inflation models: Two-scalar theory and Yukawa theory
Author(s)
Ayuki Kamada; Takumi Kuwahara
Publication Date
2020-05
Journal
Physical Review d, v.101, no.9, pp.096012-1
Publisher
AMER PHYSICAL SOC
Abstract
© 2020 authors. Published by the American Physical Society. We demonstrate two properties of the trace of the energy-momentum tensor T-mu(mu) in the flat spacetime. One is the decoupling of heavy degrees of freedom; i.e., heavy degrees of freedom leave no effect for low-energy T-mu(mu)-inserted amplitudes. This is intuitively apparent from the effective field theory point of view, but one has to take into account the so-called trace anomaly to explicitly demonstrate the decoupling. As a result, for example, in the R-2 inflation model, scalaron decay is insensitive to heavy degrees of freedom when a matter sector minimally couples to gravity (up to a nonminimal coupling of a matter scalar field other than the scalaron). The other property is a quantum contribution to a nonminimal coupling of a scalar field. The nonminimal coupling disappears from the action in the flat spacetime, but leaves the so-called improvement term in T-mu(mu). We study the renormalization group equation of the nonminimal coupling to discuss its quantum-induced value and implications for inflation dynamics. We work it out in the two-scalar theory and Yukawa theory
URI
https://pr.ibs.re.kr/handle/8788114/7857
DOI
10.1103/PhysRevD.101.096012
ISSN
2470-0010
Appears in Collections:
Center for Fundamental Theory(순수물리이론 연구단) > 1. Journal Papers (저널논문)
Files in This Item:
There are no files associated with this item.

qrcode

  • facebook

    twitter

  • Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
해당 아이템을 이메일로 공유하기 원하시면 인증을 거치시기 바랍니다.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse