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

KATRIN Collaboration

doi:10.1126/science.adq9592

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

KATRIN Collaboration

Assistant Professorship of Dark Matter

Kernforschungszentrum Karlsruhe
University of Münster
Sezione INFN di Milano Bicocca
University of North Carolina
Triangle Universities Nuclear Laboratory
Politecnico di Milano
INFN Sezione di Milano
Chulalongkorn University
Carnegie Mellon University
Bergische Universität Wuppertal
Humanoid Technologies Lab (H2T)
University of Washington
Nuclear Physics Institute of the Cas
Technical University of Munich
Max Planck Institute for Physics
Massachusetts Institute of Technology
Max-Planck-Institut für Kernphysik
Suranaree University of Technology
CEA
Lawrence Berkeley National Laboratory
Universit̀ Degli Studi di Milano-Bicocca
Universidad Autónoma de Madrid
Humboldt-Universität zu Berlin
Heidelberg University
Johannes Gutenberg University
Institute for Nuclear Research of the Russian Academy of Sciences

Research output: Contribution to journal › Article › peer-review

77 Scopus citations

Abstract

That neutrinos carry a nonvanishing restmass 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 m2v= 0:14+0.13-0.15 eV2, resulting in an upper limit of mv < 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.

Original language	English
Pages (from-to)	180-185
Number of pages	6
Journal	Science
Volume	388
Issue number	6743
DOIs	https://doi.org/10.1126/science.adq9592
State	Published - 11 Apr 2025

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10.1126/science.adq9592

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@article{b9d901f470a748a8b143698da6ab7b24,

title = "Direct neutrino-mass measurement based on 259 days of KATRIN data",

abstract = "That neutrinos carry a nonvanishing restmass 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 m2v= 0:14+0.13-0.15 eV2, resulting in an upper limit of mv < 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 = "\{KATRIN Collaboration\} and Max Aker and Dominic Batzler and Armen Beglarian and Jan Behrens and Justus Beisenk{\"o}tter and Matteo Biassoni and Benedikt Bieringer and Yanina Biondi and Fabian Block and Steffen Bobien and Matthias B{\"o}ttcher and Beate Bornschein and Lutz Bornschein and Caldwell, \{Tom S.\} and Marco Carminati and Auttakit Chatrabhuti and Suren Chilingaryan and Daniel, \{Byron A.\} and Karol Debowski and Martin Descher and Barrero, \{Deseada D{\'i}az\} and Doe, \{Peter J.\} and Otokar Dragoun and Guido Drexlin and Frank Edzards and Klaus Eite and Enrico Ellinger and Ralph Enge and Sanshiro Enomoto and Arne Felden and Caroline Fengler and Carlo Fiorini and Formaggio, \{Joseph A.\} and Christian Forstner and Fr{\"a}nkle, \{Florian M.\} and Kevin Gauda and Gavin, \{Andrew S.\} and Woosik Gi and Ferenc Gl{\"u}ck and Steffen Grohmann and Robin Gr{\"o}ssle and Rainer Gumbsheimer and Nathanael Gutknecht and Volker Hannen and Leonard Hasselmann and Norman Hau{\ss}mann and Klaus Helbing and Hanna Henke and Svenja Heyns and Susanne Mertens",

note = "Publisher Copyright: Copyright {\textcopyright} 2025 the authors, some rights reserved.",

year = "2025",

month = apr,

day = "11",

doi = "10.1126/science.adq9592",

language = "English",

volume = "388",

pages = "180--185",

journal = "Science",

issn = "0036-8075",

publisher = "American Association for the Advancement of Science",

number = "6743",

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TY - JOUR

T1 - Direct neutrino-mass measurement based on 259 days of KATRIN data

AU - KATRIN Collaboration

AU - Aker, Max

AU - Batzler, Dominic

AU - Beglarian, Armen

AU - Behrens, Jan

AU - Beisenkötter, Justus

AU - Biassoni, Matteo

AU - Bieringer, Benedikt

AU - Biondi, Yanina

AU - Block, Fabian

AU - Bobien, Steffen

AU - Böttcher, Matthias

AU - Bornschein, Beate

AU - Bornschein, Lutz

AU - Caldwell, Tom S.

AU - Carminati, Marco

AU - Chatrabhuti, Auttakit

AU - Chilingaryan, Suren

AU - Daniel, Byron A.

AU - Debowski, Karol

AU - Descher, Martin

AU - Barrero, Deseada Díaz

AU - Doe, Peter J.

AU - Dragoun, Otokar

AU - Drexlin, Guido

AU - Edzards, Frank

AU - Eite, Klaus

AU - Ellinger, Enrico

AU - Enge, Ralph

AU - Enomoto, Sanshiro

AU - Felden, Arne

AU - Fengler, Caroline

AU - Fiorini, Carlo

AU - Formaggio, Joseph A.

AU - Forstner, Christian

AU - Fränkle, Florian M.

AU - Gauda, Kevin

AU - Gavin, Andrew S.

AU - Gi, Woosik

AU - Glück, Ferenc

AU - Grohmann, Steffen

AU - Grössle, Robin

AU - Gumbsheimer, Rainer

AU - Gutknecht, Nathanael

AU - Hannen, Volker

AU - Hasselmann, Leonard

AU - Haußmann, Norman

AU - Helbing, Klaus

AU - Henke, Hanna

AU - Heyns, Svenja

AU - Mertens, Susanne

PY - 2025/4/11

Y1 - 2025/4/11

N2 - That neutrinos carry a nonvanishing restmass 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 m2v= 0:14+0.13-0.15 eV2, resulting in an upper limit of mv < 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.

AB - That neutrinos carry a nonvanishing restmass 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 m2v= 0:14+0.13-0.15 eV2, resulting in an upper limit of mv < 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.

UR - https://www.scopus.com/pages/publications/105009110194

U2 - 10.1126/science.adq9592

DO - 10.1126/science.adq9592

M3 - Article

AN - SCOPUS:105009110194

SN - 0036-8075

VL - 388

SP - 180

EP - 185

JO - Science

JF - Science

IS - 6743

ER -

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

Abstract

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