HUSCAP logo Hokkaido Univ. logo

Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Science / Faculty of Science >
Peer-reviewed Journal Articles, etc >

Beginning of Universe through large field hybrid inflation

Files in This Item:
MPLA_30_1550106 .pdf214.7 kBPDFView/Open
Please use this identifier to cite or link to this item:

Title: Beginning of Universe through large field hybrid inflation
Authors: Kobayashi, Tatsuo Browse this author →KAKEN DB
Seto, Osamu Browse this author →KAKEN DB
Keywords: Inflationary Universe
Issue Date: 10-Jul-2015
Publisher: World Scientific Publishing
Journal Title: Modern Physics Letters A
Volume: 30
Issue: 21
Start Page: 1550106
Publisher DOI: 10.1142/S0217732315501060
Abstract: Recent detection of B-mode polarization induced from tensor perturbations by the BICEP2 experiment implies the so-called large field inflation, where an inflaton field takes super-Planckian expectation value during inflation, at a high energy scale. We show however, if another inflation follows hybrid inflation, the hybrid inflation can generate a large tensor perturbation with not super-Planckian but Planckian field value. This scenario would relax the tension between BICEP2 and Planck concerning the tensor-to-scalar ratio, because a negative large running can also be obtained for a certain number of e-fold of the hybrid inflation. A natural interpretation of a large gravitational wave mode with or without the scalar spectral running might be multiple inflation in the early Universe.
Rights: Electronic version of an article published as Modern Physics Letters A, Volume 30, Issue 21, 2015, 1550106 (11 pages) DOI: 10.1142/S0217732315501060 © copyright World Scientific Publishing Company
Type: article (author version)
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 小林 達夫

Export metadata:

OAI-PMH ( junii2 , jpcoar_1.0 )

MathJax is now OFF:


 - Hokkaido University