A viable logarithmic f (R) model for inflation

被引：17

作者：

Amin, M. ^{[1
]}

Khalil, S. ^{[1
]}

Salah, M. ^{[1
,2
]}

机构：

[1] Ctr Fundamental Phys, Zewail City Sci & Technol, 6 October City, Giza, Egypt

[2] Cairo Univ, Fac Sci, Dept Math, Giza, Egypt

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2016年 / 08期

关键词：

inflation; modified gravity; MODIFIED GRAVITY; UNIVERSE; FLATNESS; HORIZON; PHYSICS;

D O I：

10.1088/1475-7516/2016/08/043

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Inflation in the framework of f(R) modified gravity is revisited. We study the conditions that f(R) should satisfy in order to lead to a viable inflationary model in the original form and in the Einstein frame. Based on these criteria we propose a new logarithmic model as a potential candidate for f (R) theories aiming to describe inflation consistent with observations from Planck satellite (2015). The model predicts scalar spectral index 0.9615 < n(s) < 0.9693 in agreement with observation and tensor-to-scalar ratio gamma of order 10(-3). Furthermore, we show that for a class of models, a natural coupling between inflation and a scalar boson is generated through the minimal coupling between gravity and matter fields and a reheating temperature less that 10(9) GeV is obtained.

引用

页数：14

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