Probing the Earth Core Composition with Neutrino Oscillation Tomography
International audience Atmospheric neutrinos open the way to alternative probing methods to study the structure and composition of the inner Earth, complementary to geophysical methods. At GeV energies, the flavour oscillations of neutrinos crossing the Earth are distorted due to coherent forward sc...
Published in: | Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019) |
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ftunivparis:oai:HAL:hal-02966278v1 2024-06-02T08:12:48+00:00 Probing the Earth Core Composition with Neutrino Oscillation Tomography Bourret, Simon Coelho, Joao Kaminski, Edouard van Elewyck, Veronique AstroParticule et Cosmologie (APC (UMR_7164)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) Laboratoire de l'Accélérateur Linéaire (LAL) Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) Institut de Physique du Globe de Paris (IPGP) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS) Madison, United States 2019-07-24 https://hal.science/hal-02966278 https://doi.org/10.22323/1.358.1024 en eng HAL CCSD info:eu-repo/semantics/altIdentifier/doi/10.22323/1.358.1024 hal-02966278 https://hal.science/hal-02966278 doi:10.22323/1.358.1024 INSPIRE: 1819219 PoS 36th International Cosmic Ray Conference https://hal.science/hal-02966278 36th International Cosmic Ray Conference, Jul 2019, Madison, United States. pp.1024, ⟨10.22323/1.358.1024⟩ [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] info:eu-repo/semantics/conferenceObject Conference papers 2019 ftunivparis https://doi.org/10.22323/1.358.1024 2024-05-07T02:54:47Z International audience Atmospheric neutrinos open the way to alternative probing methods to study the structure and composition of the inner Earth, complementary to geophysical methods. At GeV energies, the flavour oscillations of neutrinos crossing the Earth are distorted due to coherent forward scattering on electrons along their path. The signature of these matter effects in the neutrino angular, energy and flavour distributions may provide sensitivity to the electron density, and thus the composition, in the different layers traversed.The combination of this neutrino-based measurement with a reference mass density profile constrains the effective proton-to-nucleon ratio of the medium (Z/A). Since this parameter varies among chemical elements, this technique has the potential to provide unprecedented insights into the chemical composition of the core. Current geophysical data require the presence of a few wt% of light elements inside the iron core, whose nature and amount remain controversial.Such a measurement requires large-sized neutrino detectors with good efficiency in the relevant energy range and precise determination of the neutrino energy, arrival direction, and flavour. Considering a generic but realistic model of detector response, we discuss the influence of various detector performance indicators on the sensitivity to the average Z/A in the core. Starting from specific examples of the next-generation detectors (ORCA, DUNE), we also identify the main improvements required to reach a measurement of the H content of the core at the 1 wt% level. Conference Object Orca Université de Paris: Portail HAL Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019) 1024 |
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Université de Paris: Portail HAL |
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[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] |
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[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] Bourret, Simon Coelho, Joao Kaminski, Edouard van Elewyck, Veronique Probing the Earth Core Composition with Neutrino Oscillation Tomography |
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[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] |
description |
International audience Atmospheric neutrinos open the way to alternative probing methods to study the structure and composition of the inner Earth, complementary to geophysical methods. At GeV energies, the flavour oscillations of neutrinos crossing the Earth are distorted due to coherent forward scattering on electrons along their path. The signature of these matter effects in the neutrino angular, energy and flavour distributions may provide sensitivity to the electron density, and thus the composition, in the different layers traversed.The combination of this neutrino-based measurement with a reference mass density profile constrains the effective proton-to-nucleon ratio of the medium (Z/A). Since this parameter varies among chemical elements, this technique has the potential to provide unprecedented insights into the chemical composition of the core. Current geophysical data require the presence of a few wt% of light elements inside the iron core, whose nature and amount remain controversial.Such a measurement requires large-sized neutrino detectors with good efficiency in the relevant energy range and precise determination of the neutrino energy, arrival direction, and flavour. Considering a generic but realistic model of detector response, we discuss the influence of various detector performance indicators on the sensitivity to the average Z/A in the core. Starting from specific examples of the next-generation detectors (ORCA, DUNE), we also identify the main improvements required to reach a measurement of the H content of the core at the 1 wt% level. |
author2 |
AstroParticule et Cosmologie (APC (UMR_7164)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) Laboratoire de l'Accélérateur Linéaire (LAL) Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) Institut de Physique du Globe de Paris (IPGP) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS) |
format |
Conference Object |
author |
Bourret, Simon Coelho, Joao Kaminski, Edouard van Elewyck, Veronique |
author_facet |
Bourret, Simon Coelho, Joao Kaminski, Edouard van Elewyck, Veronique |
author_sort |
Bourret, Simon |
title |
Probing the Earth Core Composition with Neutrino Oscillation Tomography |
title_short |
Probing the Earth Core Composition with Neutrino Oscillation Tomography |
title_full |
Probing the Earth Core Composition with Neutrino Oscillation Tomography |
title_fullStr |
Probing the Earth Core Composition with Neutrino Oscillation Tomography |
title_full_unstemmed |
Probing the Earth Core Composition with Neutrino Oscillation Tomography |
title_sort |
probing the earth core composition with neutrino oscillation tomography |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://hal.science/hal-02966278 https://doi.org/10.22323/1.358.1024 |
op_coverage |
Madison, United States |
genre |
Orca |
genre_facet |
Orca |
op_source |
PoS 36th International Cosmic Ray Conference https://hal.science/hal-02966278 36th International Cosmic Ray Conference, Jul 2019, Madison, United States. pp.1024, ⟨10.22323/1.358.1024⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.22323/1.358.1024 hal-02966278 https://hal.science/hal-02966278 doi:10.22323/1.358.1024 INSPIRE: 1819219 |
op_doi |
https://doi.org/10.22323/1.358.1024 |
container_title |
Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019) |
container_start_page |
1024 |
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1800759366331138048 |