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Title: First Constraints on General Neutrino Interactions Based on KATRIN Data

Journal Article · · Physical Review Letters
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  1. Karlsruhe Institute of Technology (KIT)
  2. University of Münster
  3. Istituto Nazionale di Fisica Nucleare (INFN)
  4. Informazione e Bioingegneria; Istituto Nazionale di Fisica Nucleare (INFN)
  5. Chulalongkorn University
  6. Carnegie Mellon University
  7. University of Washington
  8. Czech Academy of Sciences
  9. Technical University of Munich; Max Planck Institute for Physics
  10. University of Wuppertal
  11. Karlsruhe Institute of Technology (KIT); Karlsruhe Institute of Technology (KIT)
  12. Massachusetts Institute of Technology
  13. Istituto Nazionale di Fisica Nucleare (INFN); Università di Milano - Bicocca
  14. University of North Carolina; Triangle Universities Nuclear Laboratory
  15. Suranaree University of Technology
  16. Université Paris-Saclay
  17. Lawrence Berkeley National Laboratory
  18. Universidad Autonoma de Madrid
  19. Humboldt-Universität zu Berlin
  20. Humboldt-Universität zu Berlin; University of Münster
  21. University of Heidelberg
  22. Johannes-Gutenberg-Universität Mainz
  23. Institute for Nuclear Research of Russian Academy of Sciences
+ Show Author Affiliations

The precision measurement of the tritium β-decay spectrum performed by the KATRIN experiment provides a unique way to search for general neutrino interactions (GNIs). All theoretically allowed GNI terms at dimension 6 involving neutrinos are incorporated into a low-energy effective field theory, and can be identified by specific signatures in the measured tritium β spectrum. In this Letter an effective description of the impact of GNIs on the β spectrum is formulated and the first constraints on the effective GNI parameters are derived based on the 4 ×106 electrons collected in the second measurement campaign of KATRIN in 2019. In addition, constraints on selected types of interactions are investigated, thereby exploring the potential of KATRIN to search for more specific new physics cases, including a right-handed W boson, a charged Higgs boson, or leptoquarks.

Research Organization:
Massachusetts Institute of Technology, Cambridge, MA (United States)
Sponsoring Organization:
Bundesministerium für Bildung und Forschung; Deutsche Forschungsgemeinschaft; Ministerstvo Školství, Mládeže a Tělovýchovy; Thailand Science Research and Innovation; USDOE; European Research Council; Helmholtz Initiative and Networking Fund
Contributing Organization:
KATRIN Collaboration
Grant/Contract Number:
SC0011091; SC0019304; FG02-94ER40818; FG02-97ER41020; FG02-97ER41041; AC02-05CH11231; FG02-97ER41033; SC0004036
OSTI ID:
2571050
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 25 Vol. 134; ISSN 0031-9007; ISSN 1079-7114
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

Beta decay
Heavy neutrinos
Neutrino interactions
Neutrinos