Inflation with massive vector fields

被引：15

作者：

Liu, Junyu ^{[1
]}

Wang, Yi ^{[2
]}

Zhou, Siyi ^{[2
]}

机构：

[1] Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China

[2] Hong Kong Univ Sci & Technol, Dept Phys, Kowloon, Hong Kong, Peoples R China

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2015年 / 08期

基金：

欧洲研究理事会;

关键词：

inflation; physics of the early universe; cosmological perturbation theory; PERTURBATIONS; FLATNESS; UNIVERSE; HORIZON;

D O I：

10.1088/1475-7516/2015/08/033

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We investigate the coupling between the inflaton and massive vector fields. All renormalizable couplings with shift symmetry of the inflaton are considered. The massive vector can be decomposed into a scalar mode and a divergence-free vector mode. We show that the former naturally interacts with the inflaton and the latter decouples at tree level. The model in general predicts f(NL)(equil) = O(1), while in some regions of the parameter space large non-Gaussianity can arise.

引用

页数：20

共 21 条

[1] COSMOLOGY FOR GRAND UNIFIED THEORIES WITH RADIATIVELY INDUCED SYMMETRY-BREAKING
ALBRECHT, A
STEINHARDT, PJ
[J]. PHYSICAL REVIEW LETTERS, 1982, 48 (17) : 1220 - 1223
[2] k-Inflation
Armendáriz-Picón, C
Damour, T
Mukhanov, V
[J]. PHYSICS LETTERS B, 1999, 458 (2-3) : 209 - 218
[3] k-Essence, superluminal propagation, causality and emergent geometry
Babichev, Eugeny
Mukhanov, Viatcheslav
Vikman, Alexander
[J]. JOURNAL OF HIGH ENERGY PHYSICS, 2008, (02):
[4] Signature of supersymmetry from the early universe
Baumann, Daniel
Green, Daniel
[J]. PHYSICAL REVIEW D, 2012, 85 (10)
[5] Observational signatures and non-Gaussianities of general single-field inflation
Chen, Xingang
Huang, Min-xin
Kachru, Shamit
Shiu, Gary
[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2007, (01):
[6] Quasi-single field inflation with large mass
Chen, Xingang
Wang, Yi
[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2012, (09):
[7] Primordial Non-Gaussianities from Inflation Models
Chen, Xingang
[J]. ADVANCES IN ASTRONOMY, 2010, 2010
[8] Quasi-single field inflation and non-Gaussianities
Chen, Xingang
Wang, Yi
[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2010, (04):
[9] Large non-Gaussianities with intermediate shapes from quasi-single-field inflation
Chen, Xingang
Wang, Yi
[J]. PHYSICAL REVIEW D, 2010, 81 (06)
[10] INFLATION DRIVEN BY A VECTOR FIELD
FORD, LH
[J]. PHYSICAL REVIEW D, 1989, 40 (04): : 967 - 972

← 1 2 3 →