TY  - JOUR
AU  - Broy, Benedict
AU  - Galante, M.
AU  - Roest, D.
AU  - Westphal, A.
TI  - Pole inflation — Shift symmetry and universal corrections
JO  - Journal of high energy physics
VL  - 2015
IS  - 12
SN  - 1029-8479
CY  - Berlin
PB  - Springer
M1  - PUBDB-2016-00457
M1  - DESY-15-115
M1  - arXiv: 1507.02277
SP  - 149
PY  - 2015
AB  - 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.
LB  - PUB:(DE-HGF)29 ; PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000411148700001
DO  - DOI:10.1007/JHEP12(2015)149
UR  - https://bib-pubdb1.desy.de/record/293352
ER  -