TY  - RPRT
AU  - Broy, Benedict
AU  - Galante, Mario
AU  - Roest, Diederik
AU  - Westphal, Alexander
TI  - Pole Inflation - Shift Symmetry and Universal Corrections
IS  - DESY-15-115
M1  - PUBDB-2015-02691
M1  - DESY-15-115
M1  - arXiv:1507.02277
SP  - 9
PY  - 2015
AB  - An appealing explanation for the Planck data is provided by inflationary models with a 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. We show that the resulting corrections to the inflationary dynamics and predictions are universal at lowest order, and can induce power loss at large angular scales. At lowest order there are no corrections from a pole of one order higher; this is referred to as extended no-scale in string theory and we explain why this is a general phenomenon. Finally, we outline which other corrections may arise as string loop corrections.
KW  - inflation: model (autogen)
KW  - pole (autogen)
KW  - kinetic (autogen)
KW  - Laurent expansion (autogen)
KW  - string model (autogen)
KW  - higher-order (autogen)
KW  - string (autogen)
KW  - Planck (autogen)
LB  - PUB:(DE-HGF)15
UR  - https://bib-pubdb1.desy.de/record/221504
ER  -