期刊
PHYSICS LETTERS B
卷 730, 期 -, 页码 81-88出版社
ELSEVIER
DOI: 10.1016/j.physletb.2014.01.039
关键词
-
资金
- MEC
- FEDER (EC) [FPA2011-23596]
- Generalitat Valenciana [PROMETEOII/2013/017]
- Basic Science Research Program through the National Research Foundation of Korea (NRF)
- Ministry of Education, Science and Technology [2013R1A1A2007919]
- SRC program of NRF Grant [2009-0083526]
- Korea Government (MSIP) through Korea Neutrino Research Center
We revisit a single field inflationary model based on Coleman-Weinberg potentials. We show that in small field Coleman-Weinberg inflation, the observed amplitude of perturbations needs an extremely small quartic coupling of the inflaton, which might be a signature of radiative origin. However, the spectral index obtained in a standard cosmological scenario turns out to be outside the 2 sigma region of the Planck data. When a non-standard cosmological framework is invoked, such as brane-world cosmology in the Randall-Sundrum model, the spectral index can be made consistent with Planck data within la, courtesy of the modification in the evolution of the Hubble parameter in such a scheme. We also show that the required inflaton quartic coupling as well as a phenomenologically viable B - L symmetry breaking together with a natural electroweak symmetry breaking can arise dynamically in a generalized B - L extension of the Standard Model where the full potential is assumed to vanish at a high scale. (C) 2014 The Authors. Published by Elsevier B.V.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据