Spotting deviations from R2 inflation

被引：34

作者：

de la Cruz-Dombriz, Alvaro ^{[1
]}

Elizalde, Emilio ^{[2
]}

Odintsov, Sergei D. ^{[2
,3
,5
,6
]}

Saez-Gomez, Diego ^{[4
]}

机构：

[1] Univ Cape Town, Dept Math & Appl Math, ACGC, ZA-7701 Cape Town, South Africa

[2] ICE CSIC IEEC, Inst Ciencies Espai, Campus UAB,Carrer Can Magrans S-N, Bellaterra 08193, Barcelona, Spain

[3] ICREA, Passeig Lluis Co 23, Barcelona 08010, Spain

[4] Univ Lisbon, Inst Astrofis & Ciencias Espaco, Fac Ciencias, Edificio C8, P-1749016 Lisbon, Portugal

[5] TSPU, 60A Kiev St, Tomsk 634061, Russia

[6] Tomsk State Univ Control Syst & Radioelect TUSUR, 40 Lenina Prospect, Tomsk 634050, Russia

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2016年 / 05期

基金：

新加坡国家研究基金会;

关键词：

cosmological perturbation theory; gravity; inflation; modified gravity; EFFECTIVE-FIELD-THEORY; MODIFIED GRAVITY; COSMOLOGICAL RECONSTRUCTION; F(R) GRAVITY; DARK ENERGY; MATTER; PERTURBATIONS; CONSTRAINTS; VECTOR; MODELS;

D O I：

10.1088/1475-7516/2016/05/060

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We discuss the soundness of inflationary scenarios in theories beyond the Starobinsky model, namely a class of theories described by arbitrary functions of the Ricci scalar and the K-essence field. We discuss the pathologies associated with higher-order equations of motion which will be shown to constrain the stability of this class of theories. We provide a general framework to calculate the slow-roll parameters and the corresponding Mappings to the theory parameters. For paradigmatic gravitational models within the class of theories under consideration we illustrate the power of the Planck/Bicep2 latest results to constrain such gravitational Lagrangians. Finally, bounds for potential deviations from Starobinsky-like inflation are derived.

引用

页数：29

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