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Kamada, Ayuki
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Lessons from Tμμ on inflation models: Two-loop renormalization of η in the scalar QED

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Title
Lessons from Tμμ on inflation models: Two-loop renormalization of η in the scalar QED
Author(s)
Ayuki Kamada; Takumi Kuwahara
Publication Date
2021-06
Journal
Physical Review D, v.103, no.11
Publisher
American Physical Society
Abstract
© 2021 authors. Published by the American Physical Society.A nonminimal coupling η has been attracting growing interest particularly in the context of inflation models, though its quantum nature is not clear yet. We study the renormalization of η in the scalar quantum electrodynamics (QED). There are one-loop diagrams, which could give the finite correction to η in the scalar QED. We find that they cancel with each other. We also find no inhomogeneous term of the renormalization group equation (RGE) at the two-loop level, while there could be the two-loop order finite correction. This is similar to other theories, where an inhomogeneous term of the RGE appears only at a higher-loop order: e.g., four-loop order in λφ4 theory.
URI
https://pr.ibs.re.kr/handle/8788114/9953
DOI
10.1103/PhysRevD.103.116001
ISSN
2470-0010
Appears in Collections:
Center for Fundamental Theory(순수물리이론 연구단) > 1. Journal Papers (저널논문)
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