Unveiling V modes: enhancing CMB sensitivity to BSM physics with a non-ideal half-wave plate

被引：0

作者：

Raffuzzi, N. ^{[1
,2
]}

Lembo, M. ^{[1
,2
]}

Giardiello, S. ^{[1
,3
]}

Gerbino, M. ^{[2
]}

Lattanzi, M. ^{[2
]}

Natoli, P. ^{[2
]}

Pagano, L. ^{[1
,2
,4
]}

机构：

[1] Univ Ferrara, Dipartimento Fis & Sci Terra, Via Saragat 1, I-44122 Ferrara, Italy

[2] Ist Nazl Fis Nucleare, Sez Ferrara, Via Saragat 1, I-44122 Ferrara, Italy

[3] Cardiff Univ, Sch Phys & Astron, Cardiff CF24 3AA, Wales

[4] Univ Paris Saclay, Univ Paris Sud, Inst Astrophys Spatiale, CNRS, Bat 121, F-91405 Orsay, France

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2025年 / 03期

基金：

欧盟地平线“2020”;

关键词：

CMBR experiments; CMBR polarisation; cosmological parameters from CMBR; Bayesian reasoning; MICROWAVE BACKGROUND ASTRONOMY; SUBMILLIMETER INSTRUMENTS; POWER SPECTRA;

D O I：

10.1088/1475-7516/2025/03/009

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

V-mode polarization of the cosmic microwave background is expected to be vanishingly small in the Lambda CDM model and, hence, usually ignored. Nonetheless, several astrophysical effects, as well as beyond standard model physics could produce it at a detectable level. A realistic half-wave plate an optical element commonly used in CMB experiments to modulate the polarized signal can provide sensitivity to V modes without significantly spoiling that to linear polarization. We assess this sensitivity for some new-generation CMB experiments, such as the LiteBIRD satellite, the ground-based Simons Observatory and a CMB-S4-like experiment. We forecast the efficiency of these experiments to constrain the phenomenology of certain classes of BSM models inducing mixing of linear polarization states and generation of V modes in the CMB. We find that new-generation experiments can improve current limits by 1-to-3 orders of magnitude, depending on the data combination. The inclusion of V-mode information dramatically boosts the sensitivity to these BSM models.

引用

页数：28