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

Abstract

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.

Authors:
; ; ;
Publication Date:
OSTI Identifier:
22375844
Resource Type:
Journal Article
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2014; Journal Issue: 10; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1475-7516
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; CORRELATIONS; DUSTS; FLUCTUATIONS; FUNCTIONS; ORIGIN; PERTURBATION THEORY; POLARIZATION; SIGNALS; SPECTRA

Citation Formats

Kehagias, A., Dizgah, A. Moradinezhad, Noreña, J., Perrier, H., and Riotto, A., E-mail: kehagias@central.ntua.gr, E-mail: Azadeh.Moradinezhad@unige.ch, E-mail: Jorge.Norena@unige.ch, E-mail: Hideki.Perrier@unige.ch, E-mail: Antonio.Riotto@unige.ch. A consistency relation for the CMB B-mode polarization in the squeezed limit. United States: N. p., 2014. Web. doi:10.1088/1475-7516/2014/10/011.
Kehagias, A., Dizgah, A. Moradinezhad, Noreña, J., Perrier, H., & Riotto, A., E-mail: kehagias@central.ntua.gr, E-mail: Azadeh.Moradinezhad@unige.ch, E-mail: Jorge.Norena@unige.ch, E-mail: Hideki.Perrier@unige.ch, E-mail: Antonio.Riotto@unige.ch. A consistency relation for the CMB B-mode polarization in the squeezed limit. United States. https://doi.org/10.1088/1475-7516/2014/10/011
Kehagias, A., Dizgah, A. Moradinezhad, Noreña, J., Perrier, H., and Riotto, A., E-mail: kehagias@central.ntua.gr, E-mail: Azadeh.Moradinezhad@unige.ch, E-mail: Jorge.Norena@unige.ch, E-mail: Hideki.Perrier@unige.ch, E-mail: Antonio.Riotto@unige.ch. 2014. "A consistency relation for the CMB B-mode polarization in the squeezed limit". United States. https://doi.org/10.1088/1475-7516/2014/10/011.
@article{osti_22375844,
title = {A consistency relation for the CMB B-mode polarization in the squeezed limit},
author = {Kehagias, A. and Dizgah, A. Moradinezhad and Noreña, J. and Perrier, H. and Riotto, A., E-mail: kehagias@central.ntua.gr, E-mail: Azadeh.Moradinezhad@unige.ch, E-mail: Jorge.Norena@unige.ch, E-mail: Hideki.Perrier@unige.ch, E-mail: Antonio.Riotto@unige.ch},
abstractNote = {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.},
doi = {10.1088/1475-7516/2014/10/011},
url = {https://www.osti.gov/biblio/22375844}, journal = {Journal of Cosmology and Astroparticle Physics},
issn = {1475-7516},
number = 10,
volume = 2014,
place = {United States},
year = {Wed Oct 01 00:00:00 EDT 2014},
month = {Wed Oct 01 00:00:00 EDT 2014}
}