All-flavor Search for a Diffuse Flux of Cosmic Neutrinos with Nine Years of ANTARES Data
The ANTARES detector is at present the most sensitive neutrino telescope in the northern hemisphere. The highly significant cosmic neutrino excess observed by the Antarctic IceCube detector can be studied with ANTARES, exploiting its complementing field of view, exposure, and lower energy threshold....
Published in: | The Astrophysical Journal Letters |
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Online Access: | https://dare.uva.nl/personal/pure/en/publications/allflavor-search-for-a-diffuse-flux-of-cosmic-neutrinos-with-nine-years-of-antares-data(f357d4d5-17e9-4d58-b811-76ef722bc7db).html https://doi.org/10.3847/2041-8213/aaa4f6 https://hdl.handle.net/11245.1/f357d4d5-17e9-4d58-b811-76ef722bc7db https://pure.uva.nl/ws/files/65898877/1711.07212.pdf https://arxiv.org/abs/1711.07212 |
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ftunivamstpubl:oai:dare.uva.nl:openaire_cris_publications/f357d4d5-17e9-4d58-b811-76ef722bc7db 2024-09-30T14:27:07+00:00 All-flavor Search for a Diffuse Flux of Cosmic Neutrinos with Nine Years of ANTARES Data Albert, A. Bouwhuis, M.C. Bruijn, R. Heijboer, A.J. Jongen, M. Melis, K. Samtleben, D.F.E. 2018-01-20 application/pdf https://dare.uva.nl/personal/pure/en/publications/allflavor-search-for-a-diffuse-flux-of-cosmic-neutrinos-with-nine-years-of-antares-data(f357d4d5-17e9-4d58-b811-76ef722bc7db).html https://doi.org/10.3847/2041-8213/aaa4f6 https://hdl.handle.net/11245.1/f357d4d5-17e9-4d58-b811-76ef722bc7db https://pure.uva.nl/ws/files/65898877/1711.07212.pdf https://arxiv.org/abs/1711.07212 eng eng https://dare.uva.nl/personal/pure/en/publications/allflavor-search-for-a-diffuse-flux-of-cosmic-neutrinos-with-nine-years-of-antares-data(f357d4d5-17e9-4d58-b811-76ef722bc7db).html info:eu-repo/semantics/closedAccess Albert , A , Bouwhuis , M C , Bruijn , R , Heijboer , A J , Jongen , M , Melis , K , Samtleben , D F E 2018 , ' All-flavor Search for a Diffuse Flux of Cosmic Neutrinos with Nine Years of ANTARES Data ' , Astrophysical Journal Letters , vol. 853 , no. 1 , L7 . https://doi.org/10.3847/2041-8213/aaa4f6 article 2018 ftunivamstpubl https://doi.org/10.3847/2041-8213/aaa4f6 2024-09-12T16:38:38Z The ANTARES detector is at present the most sensitive neutrino telescope in the northern hemisphere. The highly significant cosmic neutrino excess observed by the Antarctic IceCube detector can be studied with ANTARES, exploiting its complementing field of view, exposure, and lower energy threshold. Searches for an all-flavor diffuse neutrino signal, covering nine years of ANTARES data taking, are presented in this Letter. Upward-going events are used to reduce the atmospheric muon background. This work includes for the first time in ANTARES both track-like (mainly ν μ ) and shower-like (mainly ν e ) events in this kind of analysis. Track-like events allow for an increase of the effective volume of the detector thanks to the long path traveled by muons in rock and/or sea water. Shower-like events are well reconstructed only when the neutrino interaction vertex is close to, or inside, the instrumented volume. A mild excess of high-energy events over the expected background is observed in nine years of ANTARES data in both samples. The best fit for a single power-law cosmic neutrino spectrum, in terms of per-flavor flux at 100 TeV, is Φ 1f 0 (100 TeV) = (1.7±1.0)×10 −18 GeV −1 cm −2 s −1 sr −1 with spectral index Γ=2.4 +0.5 -0.4. The null cosmic flux assumption is rejected with a significance of 1.6 σ . Article in Journal/Newspaper Antarc* Antarctic Universiteit van Amsterdam: Digital Academic Repository (UvA DARE) Antarctic The Antarctic The Astrophysical Journal Letters 853 1 L7 |
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Universiteit van Amsterdam: Digital Academic Repository (UvA DARE) |
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ftunivamstpubl |
language |
English |
description |
The ANTARES detector is at present the most sensitive neutrino telescope in the northern hemisphere. The highly significant cosmic neutrino excess observed by the Antarctic IceCube detector can be studied with ANTARES, exploiting its complementing field of view, exposure, and lower energy threshold. Searches for an all-flavor diffuse neutrino signal, covering nine years of ANTARES data taking, are presented in this Letter. Upward-going events are used to reduce the atmospheric muon background. This work includes for the first time in ANTARES both track-like (mainly ν μ ) and shower-like (mainly ν e ) events in this kind of analysis. Track-like events allow for an increase of the effective volume of the detector thanks to the long path traveled by muons in rock and/or sea water. Shower-like events are well reconstructed only when the neutrino interaction vertex is close to, or inside, the instrumented volume. A mild excess of high-energy events over the expected background is observed in nine years of ANTARES data in both samples. The best fit for a single power-law cosmic neutrino spectrum, in terms of per-flavor flux at 100 TeV, is Φ 1f 0 (100 TeV) = (1.7±1.0)×10 −18 GeV −1 cm −2 s −1 sr −1 with spectral index Γ=2.4 +0.5 -0.4. The null cosmic flux assumption is rejected with a significance of 1.6 σ . |
format |
Article in Journal/Newspaper |
author |
Albert, A. Bouwhuis, M.C. Bruijn, R. Heijboer, A.J. Jongen, M. Melis, K. Samtleben, D.F.E. |
spellingShingle |
Albert, A. Bouwhuis, M.C. Bruijn, R. Heijboer, A.J. Jongen, M. Melis, K. Samtleben, D.F.E. All-flavor Search for a Diffuse Flux of Cosmic Neutrinos with Nine Years of ANTARES Data |
author_facet |
Albert, A. Bouwhuis, M.C. Bruijn, R. Heijboer, A.J. Jongen, M. Melis, K. Samtleben, D.F.E. |
author_sort |
Albert, A. |
title |
All-flavor Search for a Diffuse Flux of Cosmic Neutrinos with Nine Years of ANTARES Data |
title_short |
All-flavor Search for a Diffuse Flux of Cosmic Neutrinos with Nine Years of ANTARES Data |
title_full |
All-flavor Search for a Diffuse Flux of Cosmic Neutrinos with Nine Years of ANTARES Data |
title_fullStr |
All-flavor Search for a Diffuse Flux of Cosmic Neutrinos with Nine Years of ANTARES Data |
title_full_unstemmed |
All-flavor Search for a Diffuse Flux of Cosmic Neutrinos with Nine Years of ANTARES Data |
title_sort |
all-flavor search for a diffuse flux of cosmic neutrinos with nine years of antares data |
publishDate |
2018 |
url |
https://dare.uva.nl/personal/pure/en/publications/allflavor-search-for-a-diffuse-flux-of-cosmic-neutrinos-with-nine-years-of-antares-data(f357d4d5-17e9-4d58-b811-76ef722bc7db).html https://doi.org/10.3847/2041-8213/aaa4f6 https://hdl.handle.net/11245.1/f357d4d5-17e9-4d58-b811-76ef722bc7db https://pure.uva.nl/ws/files/65898877/1711.07212.pdf https://arxiv.org/abs/1711.07212 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Albert , A , Bouwhuis , M C , Bruijn , R , Heijboer , A J , Jongen , M , Melis , K , Samtleben , D F E 2018 , ' All-flavor Search for a Diffuse Flux of Cosmic Neutrinos with Nine Years of ANTARES Data ' , Astrophysical Journal Letters , vol. 853 , no. 1 , L7 . https://doi.org/10.3847/2041-8213/aaa4f6 |
op_relation |
https://dare.uva.nl/personal/pure/en/publications/allflavor-search-for-a-diffuse-flux-of-cosmic-neutrinos-with-nine-years-of-antares-data(f357d4d5-17e9-4d58-b811-76ef722bc7db).html |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.3847/2041-8213/aaa4f6 |
container_title |
The Astrophysical Journal Letters |
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853 |
container_issue |
1 |
container_start_page |
L7 |
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1811633277338910720 |