Ultra slow-roll inflation demystified

被引：100
|
作者：
Dimopoulos, Konstantinos [1 ]
机构：
[1] Univ Lancaster, Consortium Fundamental Phys, Dept Phys, Lancaster LA1 4YB, England
来源：
PHYSICS LETTERS B | 2017年 / 775卷
关键词：
MSSM;
D O I：
10.1016/j.physletb.2017.10.066
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Ultra-slow-roll (USR) inflation is a new mode of inflation which corresponds to the occasions when the inflaton field must traverse an extremely flat part of the scalar potential, when the usual slow-roll (SR) fails. We investigate USR and obtain an estimate for how long it lasts, given the initial kinetic density of the inflaton. We also find that, if the initial kinetic density is small enough, USR can be avoided and the usual SR treatment is valid. This has important implications for inflection-point inflation. (C) 2017 The Author(s). Published by Elsevier B.V.
引用
收藏
页码：262 / 265
页数：4
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