1-5 July 2019
Faculty of Physics, University of Warsaw
Europe/Warsaw timezone

Power-law Inflation with a Nondynamical Scalar Field

Not scheduled
20m
Faculty of Physics, University of Warsaw

Faculty of Physics, University of Warsaw

conference hall 0.03, Faculty of Physics, University of Warsaw ul. Pasteura 5, 02-093 Warszawa Poland
Poster session

Speaker

AYA IYONAGA

Description

Many scalar-tensor theories have more than 2 degrees of freedom because of additional scalar fields. However, there is a theory named “cuscuton” whose number of degrees of freedom is only 2 on a cosmological background. This theory has a nondynamical scalar field, which is called “cuscuton field.” In this talk, we consider inflation in the context of cuscuton gravity. We find a new exact power-law solution and show that this can be reconciled with the CMB data in the presence of the cuscuton field. We believe the result would be general in any dressed inflationary scenario.

arXiv: 1902.08663 [astro-ph.CO]

Primary authors

Asuka Ito (Kobe University) AYA IYONAGA Suro Kim (Kobe University) Jiro Soda (Kobe University)

Presentation Materials

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