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000293352 1001_ $$0P:(DE-H253)PIP1018435$$aBroy, Benedict$$b0$$udesy
000293352 245__ $$aPole inflation — Shift symmetry and universal corrections
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000293352 520__ $$aAn 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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000293352 7001_ $$aGalante, M.$$b1
000293352 7001_ $$aRoest, D.$$b2
000293352 7001_ $$0P:(DE-H253)PIP1013212$$aWestphal, A.$$b3$$eCorresponding author$$udesy
000293352 773__ $$0PERI:(DE-600)2027350-2$$a10.1007/JHEP12(2015)149$$gVol. 2015, no. 12, p. 149$$n12$$p149$$tJournal of high energy physics$$v2015$$x1029-8479$$y2015
000293352 7870_ $$0PUBDB-2015-02691$$aBroy, Benedict et.al.$$d2015$$iIsParent$$rDESY-15-115; arXiv:1507.02277$$tPole Inflation - Shift Symmetry and Universal Corrections
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