A consistency relation for the CMB B-mode polarization in the squeezed limit

被引：2

作者：

Kehagias, A. ^{[1
,2
,3
]}

Dizgah, A. Moradinezhad ^{[1
,2
]}

Norena, J. ^{[1
,2
]}

Perrier, H. ^{[1
,2
]}

Riotto, A. ^{[1
,2
]}

机构：

[1] Univ Geneva, Dept Theoret Phys, CH-1211 Geneva 4, Switzerland

[2] Ctr Astroparticle Phys, CH-1211 Geneva 4, Switzerland

[3] Natl Tech Univ Athens, Div Phys, Athens 15780, Greece

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2014年 / 10期

基金：

瑞士国家科学基金会;

关键词：

CMBR polarisation; non-gaussianity; CMBR theory; physics of the early universe; LARGE-SCALE STRUCTURE; SYMMETRIES;

D O I：

10.1088/1475-7516/2014/10/011

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A large-scale temperature perturbation has a non-zero correlation with the power spectrum of B-modes of cosmological origin on short scales while the corresponding correlation is expected to be zero for B-modes sourced by galactic foregrounds. We thus compute the squeezed limit of a three-point function in which one correlates the temperature fluctuations at large scales with two polarization modes at small scales. In the particular case of the B-mode polarization we obtain a relation that connects the squeezed limit of the TBB three-point function with the cosmological B-mode power spectrum, which can be used as a consistency relation. This could in principle help to distinguish a primordial signal from that induced by inter-stellar dust.

引用

页数：17

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