Direct neutrino-mass measurement based on 259 days of KATRIN data

• 成果类型: Article
• 署名作者: Aker, Max; Batzler, Dominic; Beglarian, Armen; Behrens, Jan; Beisenkoetter, Justus; Biassoni, Matteo; Bieringer, Benedikt; Biondi, Yanina; Block, Fabian; Bobien, Steffen; Boettcher, Matthias; Bornschein, Beate; Bornschein, Lutz; Caldwell, Tom S.; Carminati, Marco; Chatrabhuti, Auttakit; Chilingaryan, Suren; Daniel, Byron A.; Debowski, Karol; Descher, Martin; Barrero, Deseada Diaz; Doe, Peter J.; Dragoun, Otokar; Drexlin, Guido; Edzards, Frank; Eitel, Klaus; Ellinger, Enrico; Engel, Ralph; Enomoto, Sanshiro; Felden, Arne; Fengler, Caroline; Fiorini, Carlo; Formaggio, Joseph A.; Forstner, Christian; Fraenkle, Florian M.; Gauda, Kevin; Gavin, Andrew S.; Gil, Woosik; Glueck, Ferenc; Grohmann, Steffen; Groessle, Robin; Gumbsheimer, Rainer; Gutknecht, Nathanael; Hannen, Volker; Hasselmann, Leonard; Haussmann, Norman; Helbing, Klaus; Henke, Hanna; Heyns, Svenja; Hickford, Stephanie; Hiller, Roman; Hillesheimer, David; Hinz, Dominic; Hoehn, Thomas; Huber, Anton; Jansen, Alexander; Karl, Christian; Kellerer, Jonas; Khosonthongkee, Khanchai; Kleifges, Matthias; Klein, Manuel; Kohpeiss, Joshua; Koehler, Christoph; Koellenberger, Leonard; Kopmann, Andreas; Kovac, Neven; Kovalik, Alojz; Krause, Holger; La Cascio, Luisa; Lasserre, Thierry; Lauer, Joscha; Le, Thanh-Long; Lebeda, Ondrej; Lehnert, Bjoern; Li, Gen; Lokhov, Alexey; Machatschek, Moritz; Mark, Martin; Marsteller, Alexander; Martin, Eric L.; Melzer, Christin; Mertens, Susanne; Mohanty, Shailaja; Mostafa, Jalal; Mueller, Klaus; Nava, Andrea; Neumann, Holger; Niemes, Simon; Onillon, Anthony; Parno, Diana S.; Pavan, Maura; Pinsook, Udomsilp; Poon, Alan W. P.; Lopez Poyato, Jose Manuel; Pozzi, Stefano; Priester, Florian; Ralis, Jan; Ramachandran, Shivani; Robertson, R. G. Hamish; Rodenbeck, Caroline; Roellig, Marco; Roettele, Carsten; Rysav, Milos; Sack, Rudolf; Saenz, Alejandro; Salomon, Richard; Schaefer, Peter; Schloesser, Magnus; Schloesser, Klaus; Schlueter, Lisa; Schneidewind, Sonja; Schnurr, Ulrich; Schrank, Michael; Schuermann, Jannis; Schuetz, Ann-Kathrin; Schwemmer, Alessandro; Schwenck, Adrian; Sefcik, Michal; Siegmann, Daniel; Simon, Frank; Spanier, Felix; Spreng, Daniela; Sreethawong, Warintorn; Steidl, Markus; Storek, Jaroslav; Stribl, Xaver; Sturm, Michael; Suwonjandee, Narumon; Jerome, Nicholas Tan; Telle, Helmut H.; Thorne, Larisa A.; Thuemmler, Thomas; Tirolf, Simon; Titov, Nikita; Tkachev, Igor; Urban, Korbinian; Valerius, Kathrin; Venos, Drahoslav; Weinheimer, Christian; Welte, Stefan; Wendel, Juergen; Wiesinger, Christoph; Wilkerson, John F.; Wolf, Joachim; Wuestling, Sascha; Wydra, Johanna; Xu, Weiran; Zadorozhny, Sergey; Zeller, Genrich
• 署名单位: Helmholtz Association; Karlsruhe Institute of Technology; Helmholtz Association; Karlsruhe Institute of Technology; University of Munster; Istituto Nazionale di Fisica Nucleare (INFN); Helmholtz Association; Karlsruhe Institute of Technology; University of North Carolina; University of North Carolina Chapel Hill; University of North Carolina; University of North Carolina Chapel Hill; Duke University; North Carolina State University; Triangle Universities Nuclear Laboratory; Polytechnic University of Milan; Istituto Nazionale di Fisica Nucleare (INFN); Chulalongkorn University; Carnegie Mellon University; University of Wuppertal; Helmholtz Association; Karlsruhe Institute of Technology; University of Washington; University of Washington Seattle; University of Washington; University of Washington Seattle; Czech Academy of Sciences; Nuclear Physics Institute of the Czech Academy of Sciences; Technical University of Munich; Max Planck Society; Massachusetts Institute of Technology (MIT); Helmholtz Association; Karlsruhe Institute of Technology; Suranaree University of Technology; Suranaree University of Technology; Universite Paris Cite; CEA; Universite Paris Saclay; United States Department of Energy (DOE); Lawrence Berkeley National Laboratory; Max Planck Society; University of Milano-Bicocca; Autonomous University of Madrid; Humboldt University of Berlin; Ruprecht Karls University Heidelberg; Johannes Gutenberg University of Mainz; Russian Academy of Sciences; Institute for Nuclear Research of the Russian Academy of Sciences; Duke University
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-11563
• DOI: 10.1126/science.adq9592
• 发表日期: 2025-04-10
• 页码: 180-185
• 关键词: beta-decay

摘要

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 beta-decay close to the kinematic endpoint. On the basis of the first five measurement campaigns, we derived a best-fit value of m(nu)(2) = -0.14(-0.15)(+0.13) eV(2), resulting in an upper limit of m(nu) < 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.