R2 log R quantum corrections and the inflationary observables

被引：22

作者：

Ben-Dayan, Ido ^{[1
]}

Jing, Shenglin ^{[2
,3
]}

Torabian, Mahdi ^{[4
]}

Westphal, Alexander ^{[1
]}

Zarate, Lucila ^{[5
]}

机构：

[1] DESY Theory Grp, D-22607 Hamburg, Germany

[2] Univ Toronto, Canadian Inst Theoret Astrophys, Toronto, ON M5S 3H8, Canada

[3] Univ Toronto, Dept Astron & Astrophys, Toronto, ON M5S 3H4, Canada

[4] Inst Res Fundamental Sci, Sch Particles & Accelerators, Tehran, Iran

[5] Univ Hamburg, Inst Theoret Phys, D-22761 Hamburg, Germany

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2014年 / 09期

关键词：

inflation; cosmological perturbation theory; CONSTRAINTS;

D O I：

10.1088/1475-7516/2014/09/005

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study a model of inflation with terms quadratic and logarithmic in the Ricci scalar, where the gravitational action is f (R) = R+alpha R-2+beta R-2 In R. These terms are expected to arise from one loop corrections involving matter fields in curved space-time. The spectral index ris and the tensor to scalar ratio yield 4 x 10(-4) less than or similar to r less than or similar to 0.03 and 0.94 less than or similar to n(s) <= 0.99. i.e. r is an order of magnitude bigger or smaller than the original Starobinsky model which predicted r similar to 10(-3). Further enhancement of r gives a scale invariant n(s) similar to 1 or higher. Other inflationary observables are dn(s)/d ln k greater than or similar to 5.2 x 10(-4), mu less than or similar to 2.1 x 10(-8), y less than or similar to 2.6 x 10(-9). Despite the enhancement in r, if the recent BICEP2 measurement stands, this model is disfavoured.

引用

页数：10

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