Direct neutrino-mass measurement based on 259 days of KATRIN data
That neutrinos carry a nonvanishing rest mass is evidence of physics beyond the Standard Model of elementary particles. Their absolute mass holds relevance in fields from particle physics to cosmology. We report on the search for the effective electron antineutrino mass with the KATRIN experiment. K...
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| Published in: | Science (American Association for the Advancement of Science) Vol. 388; no. 6743; p. 180 |
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
United States
11.04.2025
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| ISSN: | 1095-9203, 1095-9203 |
| Online Access: | Get more information |
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| Abstract | That neutrinos carry a nonvanishing rest mass is evidence of physics beyond the Standard Model of elementary particles. Their absolute mass holds relevance in fields from particle physics to cosmology. We report on the search for the effective electron antineutrino mass with the KATRIN experiment. KATRIN performs precision spectroscopy of the tritium β-decay close to the kinematic endpoint. On the basis of the first five measurement campaigns, we derived a best-fit value of [Formula: see text] eV
, resulting in an upper limit of
< 0.45 eV at 90% confidence level. Stemming from 36 million electrons collected in 259 measurement days, a substantial reduction of the background level, and improved systematic uncertainties, this result tightens KATRIN's previous bound by a factor of almost two. |
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| AbstractList | That neutrinos carry a nonvanishing rest mass is evidence of physics beyond the Standard Model of elementary particles. Their absolute mass holds relevance in fields from particle physics to cosmology. We report on the search for the effective electron antineutrino mass with the KATRIN experiment. KATRIN performs precision spectroscopy of the tritium β-decay close to the kinematic endpoint. On the basis of the first five measurement campaigns, we derived a best-fit value of [Formula: see text] eV2, resulting in an upper limit of mν < 0.45 eV at 90% confidence level. Stemming from 36 million electrons collected in 259 measurement days, a substantial reduction of the background level, and improved systematic uncertainties, this result tightens KATRIN's previous bound by a factor of almost two.That neutrinos carry a nonvanishing rest mass is evidence of physics beyond the Standard Model of elementary particles. Their absolute mass holds relevance in fields from particle physics to cosmology. We report on the search for the effective electron antineutrino mass with the KATRIN experiment. KATRIN performs precision spectroscopy of the tritium β-decay close to the kinematic endpoint. On the basis of the first five measurement campaigns, we derived a best-fit value of [Formula: see text] eV2, resulting in an upper limit of mν < 0.45 eV at 90% confidence level. Stemming from 36 million electrons collected in 259 measurement days, a substantial reduction of the background level, and improved systematic uncertainties, this result tightens KATRIN's previous bound by a factor of almost two. That neutrinos carry a nonvanishing rest mass is evidence of physics beyond the Standard Model of elementary particles. Their absolute mass holds relevance in fields from particle physics to cosmology. We report on the search for the effective electron antineutrino mass with the KATRIN experiment. KATRIN performs precision spectroscopy of the tritium β-decay close to the kinematic endpoint. On the basis of the first five measurement campaigns, we derived a best-fit value of [Formula: see text] eV , resulting in an upper limit of < 0.45 eV at 90% confidence level. Stemming from 36 million electrons collected in 259 measurement days, a substantial reduction of the background level, and improved systematic uncertainties, this result tightens KATRIN's previous bound by a factor of almost two. |
| Author | Hiller, Roman Onillon, Anthony Lasserre, Thierry Biondi, Yanina Lebeda, Ondřej Hillesheimer, David Debowski, Karol Henke, Hanna Mertens, Susanne Poon, Alan W P Priester, Florian Daniel, Byron A Barrero, Deseada Díaz Glück, Ferenc Helbing, Klaus Mark, Martin Marsteller, Alexander Ellinger, Enrico Bobien, Steffen Parno, Diana S Kellerer, Jonas Kovalík, Alojz Robertson, R G Hamish Machatschek, Moritz Ráliš, Jan Biassoni, Matteo Pozzi, Stefano Hickford, Stephanie Drexlin, Guido Fiorini, Carlo Niemes, Simon Doe, Peter J La Cascio, Luisa Dragoun, Otokar Gavin, Andrew S Gutknecht, Nathanael Lehnert, Bjoern Melzer, Christin Caldwell, Tom S Aker, Max Enomoto, Sanshiro Bornschein, Beate Neumann, Holger Martin, Eric L Fränkle, Florian M Köhler, Christoph Grohmann, Steffen Höhn, Thomas Jansen, Alexander Klein, Manuel Eitel, Klaus Hinz, Dominic Formaggio, Joseph A Le, Thanh-Long Mohanty, Shailaja Chatrabhuti, Auttakit Lauer, Joscha Karl, Christian Khosonthongkee, Khanchai Böttcher, Matthias Forstner, Christian Grössle, Robin Edzards, Frank Nava, Andrea Ramachan |
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Pavan, Maura organization: Dipartimento di Fisica, Università di Milano-Bicocca, Milano, Italy – sequence: 92 givenname: Udomsilp orcidid: 0000-0002-8450-7751 surname: Pinsook fullname: Pinsook, Udomsilp organization: Department of Physics, Faculty of Science, Chulalongkorn University, Bangkok, Thailand – sequence: 93 givenname: Alan W P orcidid: 0000-0003-2684-6402 surname: Poon fullname: Poon, Alan W P organization: Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA – sequence: 94 givenname: Jose Manuel surname: Lopez Poyato fullname: Lopez Poyato, Jose Manuel organization: Departamento de Química Física Aplicada, Universidad Autonoma de Madrid, Madrid, Spain – sequence: 95 givenname: Stefano surname: Pozzi fullname: Pozzi, Stefano organization: Istituto Nazionale di Fisica Nucleare (INFN)-Sezione di Milano-Bicocca, Milano, Italy – sequence: 96 givenname: Florian surname: Priester fullname: Priester, Florian organization: Institute for Astroparticle Physics (IAP), Karlsruhe Institute of Technology (KIT), Eggenstein-Leopoldshafen, Germany – sequence: 97 givenname: Jan surname: Ráliš fullname: Ráliš, Jan organization: Nuclear Physics Institute, Czech Academy of Sciences, Řež, Czech Republic – sequence: 98 givenname: Shivani orcidid: 0000-0003-1047-3998 surname: Ramachandran fullname: Ramachandran, Shivani organization: Department of Physics, Faculty of Mathematics and Natural Sciences, University of Wuppertal, Wuppertal, Germany – sequence: 99 givenname: R G Hamish orcidid: 0000-0002-1028-8939 surname: Robertson fullname: Robertson, R G Hamish organization: Department of Physics, University of Washington, Seattle, WA, USA – sequence: 100 givenname: Caroline orcidid: 0000-0002-7167-8228 surname: Rodenbeck fullname: Rodenbeck, Caroline organization: Institute for Nuclear Physics, University of Münster, Münster, Germany |
| BackLink | https://www.ncbi.nlm.nih.gov/pubmed/40208982$$D View this record in MEDLINE/PubMed |
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| DOI | 10.1126/science.adq9592 |
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| References | 40209008 - Science. 2025 Apr 11;388(6743):146-147. doi: 10.1126/science.adw9435. |
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| Snippet | That neutrinos carry a nonvanishing rest mass is evidence of physics beyond the Standard Model of elementary particles. Their absolute mass holds relevance in... |
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| Title | Direct neutrino-mass measurement based on 259 days of KATRIN data |
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