Report/Journal Article

PUBDB-2016-00457

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Pole inflation — Shift symmetry and universal corrections

Broy, B.DESY* ; Galante, M. ; Roest, D. ; Westphal, A. (Corresponding author)DESY*

2015
Springer Berlin

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Please use a persistent id in citations: doi:10.1007/JHEP12(2015)149

Report No.: DESY-15-115; arXiv: 1507.02277

Abstract: An appealing explanation for the Planck data is provided by inflationary mod els with a singular non-canonical kinetic term: a Laurent expansion of the kinetic function translates into a potential with a nearly shift-symmetric plateau in canonical fields. The shift symmetry can be broken at large field values by including higher-order poles, which need to be hierarchically suppressed in order not to spoil the inflationary plateau. The herefrom resulting corrections to the inflationary dynamics and predictions are shown to be universal at lowest order and possibly to induce power loss at large angular scales. At lowest order there are no corrections from a pole of just one order higher and we argue that this phenomenon is related to the well-known extended no-scale structure arising in string theory scenarios. Finally, we outline which other corrections may arise from string loop effects.

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Contributing Institute(s):

1. Theorie-Gruppe (T)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF3-611) (POF3-611)
2. HZ-NG-603 - Strings and Cosmology - an Interface for Testing fundamental Theories (2015_IFV-HZ-NG-603) (2015_IFV-HZ-NG-603)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2015

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Database coverage:
; ; ; Current Contents - Physical, Chemical and Earth Sciences ; IF >= 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Internal Report Broy, B. (Corresponding author)DESY* ; Galante, M. ; Roest, D. ; Westphal, A.DESY*
Pole Inflation - Shift Symmetry and Universal Corrections
9 pp. (2015)2015     Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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