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| Main Authors: | , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2409.10424 |
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| _version_ | 1866916396699484160 |
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| author | Raffuzzi, N. Lembo, M. Giardiello, S. Gerbino, M. Lattanzi, M. Natoli, P. Pagano, L. |
| author_facet | Raffuzzi, N. Lembo, M. Giardiello, S. Gerbino, M. Lattanzi, M. Natoli, P. Pagano, L. |
| contents | V-mode polarization of the cosmic microwave background is expected to be vanishingly small in the $Λ$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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_10424 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Unveiling V Modes: Enhancing CMB Sensitivity to BSM Physics with a Non-Ideal Half-Wave Plate Raffuzzi, N. Lembo, M. Giardiello, S. Gerbino, M. Lattanzi, M. Natoli, P. Pagano, L. Cosmology and Nongalactic Astrophysics V-mode polarization of the cosmic microwave background is expected to be vanishingly small in the $Λ$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. |
| title | Unveiling V Modes: Enhancing CMB Sensitivity to BSM Physics with a Non-Ideal Half-Wave Plate |
| topic | Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2409.10424 |