General formula for the running of local fNL

被引：25

作者：

Byrnes, Christian T. ^{[1
,2
]}

Gong, Jinn-Ouk ^{[1
]}

机构：

[1] CERN, Div Theory, CH-1211 Geneva 23, Switzerland

[2] Univ Sussex, Ctr Astron, Brighton BN1 9QH, E Sussex, England

来源：

PHYSICS LETTERS B | 2013年 / 718卷 / 03期

基金：

美国国家科学基金会;

关键词：

MULTICOMPONENT INFLATON; INFLATIONARY UNIVERSE; HORIZON; 2ND-ORDER; FLATNESS; SPECTRUM;

D O I：

10.1016/j.physletb.2012.11.052

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We compute the scale dependence of f(NL), for models of multi-field inflation, allowing for an arbitrary field space metric. We show that, in addition to multi-field effects and self-interactions, the curved field space metric provides another source of scale dependence, which arises from the field-space Riemann curvature tensor and its derivatives. The scale dependence may be detectable within the near future if the amplitude of f(NL) is not too far from the current observational bounds. (c) 2012 Elsevier B.V. All rights reserved,

引用

页码：718 / 721

页数：4

共 61 条

[1] COSMOLOGY FOR GRAND UNIFIED THEORIES WITH RADIATIVELY INDUCED SYMMETRY-BREAKING [J].

ALBRECHT, A ;

STEINHARDT, PJ .

PHYSICAL REVIEW LETTERS, 1982, 48 (17) :1220-1223

[2]

[Anonymous], 2004, JCAP

[3]

[Anonymous], JCAP

[4] Strong scale dependent bispectrum in the Starobinsky model of inflation [J].

Arroja, Frederico ;

Sasaki, Misao .

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2012, (08)

[5]

Becker A., ARXIV12066165ASTROPH

[6] First Constraints on the Running of Non-Gaussianity [J].

Becker, Adam ;

Huterer, Dragan .

PHYSICAL REVIEW LETTERS, 2012, 109 (12)

[7] Scale-dependent non-Gaussianity as a generalization of the local model [J].

Becker, Adam ;

Huterer, Dragan ;

Kadota, Kenji .

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2011, (01)

[8] Gravity- and non-gravity-mediated couplings in multiple-field inflation [J].

Bernardeau, Francis .

CLASSICAL AND QUANTUM GRAVITY, 2010, 27 (12)

[9]

Burrage C., 2011, J COSMOL ASTROPART P, V1107, P032

[10]

Byrnes C.T., 2010, JCAP, V1010, P004

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