Atacama Cosmology Telescope: The persistence of neutrino self-interaction in cosmological measurements

Christina D. Kreisch; Minsu Park; Erminia Calabrese; Francis Yan Cyr-Racine; Rui An; J. Richard Bond; Olivier Doré; Jo Dunkley; Patricio Gallardo; Vera Gluscevic; J. Colin Hill; Adam D. Hincks; Mathew S. Madhavacheril; Jeff McMahon; Kavilan Moodley; Thomas W. Morris; Federico Nati; Lyman A. Page; Bruce Partridge; Maria Salatino; Cristóbal Sifón; David N. Spergel; Cristian Vargas; Edward J. Wollack

doi:10.1103/PhysRevD.109.043501

Atacama Cosmology Telescope: The persistence of neutrino self-interaction in cosmological measurements

Christina D. Kreisch, Minsu Park, Erminia Calabrese, Francis Yan Cyr-Racine, Rui An, J. Richard Bond, Olivier Doré, Jo Dunkley, Patricio Gallardo, Vera Gluscevic, J. Colin Hill, Adam D. Hincks, Mathew S. Madhavacheril, Jeff McMahon, Kavilan Moodley, Thomas W. Morris, Federico Nati, Lyman A. Page, Bruce Partridge, Maria SalatinoCristóbal Sifón, David N. Spergel, Cristian Vargas, Edward J. Wollack

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Abstract

We use data from the Atacama Cosmology Telescope (ACT) DR4 to search for the presence of neutrino self-interaction in the cosmic microwave background. Consistent with prior works, the posterior distributions we find are bimodal, with one mode consistent with ΛCDM and one where neutrinos strongly self-interact. By combining ACT data with large-scale information from WMAP, we find that a delayed onset of neutrino free streaming caused by significantly strong neutrino self-interaction is compatible with these data at the 2-3σ level. As seen in the past, the preference shifts to ΛCDM with the inclusion of Planck data. We determine that the preference for strong neutrino self-interaction is largely driven by angular scales corresponding to 700≲ℓ≲1000 in the ACT E-mode polarization data. This region is expected to be key to discriminate between neutrino self-interacting modes and will soon be probed with more sensitive data.

Original language	English (US)
Article number	043501
Journal	Physical Review D
Volume	109
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevD.109.043501
State	Published - Feb 15 2024

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

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10.1103/PhysRevD.109.043501

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Kreisch, C. D., Park, M., Calabrese, E., Cyr-Racine, F. Y., An, R., Bond, J. R., Doré, O., Dunkley, J., Gallardo, P., Gluscevic, V., Hill, J. C., Hincks, A. D., Madhavacheril, M. S., McMahon, J., Moodley, K., Morris, T. W., Nati, F., Page, L. A., Partridge, B., ... Wollack, E. J. (2024). Atacama Cosmology Telescope: The persistence of neutrino self-interaction in cosmological measurements. Physical Review D, 109(4), Article 043501. https://doi.org/10.1103/PhysRevD.109.043501

@article{1c56b509a8344a5b96b2f635f7e47f4e,

title = "Atacama Cosmology Telescope: The persistence of neutrino self-interaction in cosmological measurements",

abstract = "We use data from the Atacama Cosmology Telescope (ACT) DR4 to search for the presence of neutrino self-interaction in the cosmic microwave background. Consistent with prior works, the posterior distributions we find are bimodal, with one mode consistent with ΛCDM and one where neutrinos strongly self-interact. By combining ACT data with large-scale information from WMAP, we find that a delayed onset of neutrino free streaming caused by significantly strong neutrino self-interaction is compatible with these data at the 2-3σ level. As seen in the past, the preference shifts to ΛCDM with the inclusion of Planck data. We determine that the preference for strong neutrino self-interaction is largely driven by angular scales corresponding to 700≲ℓ≲1000 in the ACT E-mode polarization data. This region is expected to be key to discriminate between neutrino self-interacting modes and will soon be probed with more sensitive data.",

author = "Kreisch, {Christina D.} and Minsu Park and Erminia Calabrese and Cyr-Racine, {Francis Yan} and Rui An and Bond, {J. Richard} and Olivier Dor{\'e} and Jo Dunkley and Patricio Gallardo and Vera Gluscevic and Hill, {J. Colin} and Hincks, {Adam D.} and Madhavacheril, {Mathew S.} and Jeff McMahon and Kavilan Moodley and Morris, {Thomas W.} and Federico Nati and Page, {Lyman A.} and Bruce Partridge and Maria Salatino and Crist{\'o}bal Sif{\'o}n and Spergel, {David N.} and Cristian Vargas and Wollack, {Edward J.}",

note = "Publisher Copyright: {\textcopyright} 2024 American Physical Society.",

year = "2024",

month = feb,

day = "15",

doi = "10.1103/PhysRevD.109.043501",

language = "English (US)",

volume = "109",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "American Physical Society",

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Kreisch, CD, Park, M, Calabrese, E, Cyr-Racine, FY, An, R, Bond, JR, Doré, O, Dunkley, J, Gallardo, P, Gluscevic, V, Hill, JC, Hincks, AD, Madhavacheril, MS, McMahon, J, Moodley, K, Morris, TW, Nati, F, Page, LA, Partridge, B, Salatino, M, Sifón, C, Spergel, DN, Vargas, C & Wollack, EJ 2024, 'Atacama Cosmology Telescope: The persistence of neutrino self-interaction in cosmological measurements', Physical Review D, vol. 109, no. 4, 043501. https://doi.org/10.1103/PhysRevD.109.043501

TY - JOUR

T1 - Atacama Cosmology Telescope

T2 - The persistence of neutrino self-interaction in cosmological measurements

AU - Kreisch, Christina D.

AU - Park, Minsu

AU - Calabrese, Erminia

AU - Cyr-Racine, Francis Yan

AU - An, Rui

AU - Bond, J. Richard

AU - Doré, Olivier

AU - Dunkley, Jo

AU - Gallardo, Patricio

AU - Gluscevic, Vera

AU - Hill, J. Colin

AU - Hincks, Adam D.

AU - Madhavacheril, Mathew S.

AU - McMahon, Jeff

AU - Moodley, Kavilan

AU - Morris, Thomas W.

AU - Nati, Federico

AU - Page, Lyman A.

AU - Partridge, Bruce

AU - Salatino, Maria

AU - Sifón, Cristóbal

AU - Spergel, David N.

AU - Vargas, Cristian

AU - Wollack, Edward J.

PY - 2024/2/15

Y1 - 2024/2/15

N2 - We use data from the Atacama Cosmology Telescope (ACT) DR4 to search for the presence of neutrino self-interaction in the cosmic microwave background. Consistent with prior works, the posterior distributions we find are bimodal, with one mode consistent with ΛCDM and one where neutrinos strongly self-interact. By combining ACT data with large-scale information from WMAP, we find that a delayed onset of neutrino free streaming caused by significantly strong neutrino self-interaction is compatible with these data at the 2-3σ level. As seen in the past, the preference shifts to ΛCDM with the inclusion of Planck data. We determine that the preference for strong neutrino self-interaction is largely driven by angular scales corresponding to 700≲ℓ≲1000 in the ACT E-mode polarization data. This region is expected to be key to discriminate between neutrino self-interacting modes and will soon be probed with more sensitive data.

AB - We use data from the Atacama Cosmology Telescope (ACT) DR4 to search for the presence of neutrino self-interaction in the cosmic microwave background. Consistent with prior works, the posterior distributions we find are bimodal, with one mode consistent with ΛCDM and one where neutrinos strongly self-interact. By combining ACT data with large-scale information from WMAP, we find that a delayed onset of neutrino free streaming caused by significantly strong neutrino self-interaction is compatible with these data at the 2-3σ level. As seen in the past, the preference shifts to ΛCDM with the inclusion of Planck data. We determine that the preference for strong neutrino self-interaction is largely driven by angular scales corresponding to 700≲ℓ≲1000 in the ACT E-mode polarization data. This region is expected to be key to discriminate between neutrino self-interacting modes and will soon be probed with more sensitive data.

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U2 - 10.1103/PhysRevD.109.043501

DO - 10.1103/PhysRevD.109.043501

M3 - Article

AN - SCOPUS:85183963458

SN - 2470-0010

VL - 109

JO - Physical Review D

JF - Physical Review D

IS - 4

M1 - 043501

ER -

Atacama Cosmology Telescope: The persistence of neutrino self-interaction in cosmological measurements

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