Bound on 3+1 Active-Sterile Neutrino Mixing from the First Four-Week Science Run of KATRIN

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ID: 267887
2021
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Abstract
We report on the light sterile neutrino search from the first four-week science run of the KATRIN experiment in 2019. Beta-decay electrons from a high-purity gaseous molecular tritium source are analyzed by a high-resolution MAC-E filter down to 40 eV below the endpoint at 18.57 keV. We consider the framework with three active neutrinos and one sterile neutrino. The analysis is sensitive to the mass, m$_{4}$ f the fourth mass state for m$_{4}$$^{2}$ ≲1000 eV$^{2}$ and to active-to-sterile neutrino mixing down to |U$_{e4}$|$^{2}$≳2×10$^{-2}$. No significant spectral distortion is observed and exclusion bounds on the sterile mass and mixing are reported. These new limits supersede the Mainz results for m$_{4}$$^{2}$ ≲1000 eV$^{2}$ and improve the Troitsk bound for m$_{4}$$^{2}$< 30 eV$^{2}$. he reactor and gallium anomalies are constrained for 100
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Authors KATRIN Collaboration,M. Aker,K. Altenmüller,A. Beglarian,J. Behrens,A. Berlev,U. Besserer,B. Bieringer,K. Blaum,F. Block,B. Bornschein,M. Böttcher,T. Brunst,T. S. Caldwell,L. La Cascio,S. Chilingaryan,W. Choi,D. Díaz Barrero,K. Debowski,M. Deffert,M. Descher,P. J. Doe,O. Dragoun,G. Drexlin,S. Dyba,F. Edzards,K. Eitel,E. Ellinger,R. Engel,S. Enomoto,M. Fedkevych,A. Felden,J. A. Formaggio,F. M. Fränkle,G. B. Franklin,F. Friedel,A. Fulst,K. Gauda,W. Gil,F. Glück,R. Grössle,R. Gumbsheimer,T. Höhn,V. Hannen,N. Haußmann,K. Helbing,S. Hickford,R. Hiller,D. Hillesheimer,D. Hinz,T. Houdy,A. Huber,A. Jansen,L. Köllenberger,C. Karl,J. Kellerer,L. Kippenbrock,M. Klein,A. Kopmann,M. Korzeczek,A. Kovalík,B. Krasch,H. Krause,T. Lasserre,T. L. Le,O. Lebeda,N. Le Guennic,B. Lehnert,A. Lokhov,J. M. Lopez Poyato,K. Müller,M. Machatschek,E. Malcherek,M. Mark,A. Marsteller,E. L. Martin,C. Melzer,S. Mertens,S. Niemes,P. Oelpmann,A. Osipowicz,D. S. Parno,A. W. P. Poon,F. Priester,M. Röllig,C. Röttele,O. Rest,R. G. H. Robertson,C. Rodenbeck,M. Ryšavý,R. Sack,A. Saenz,A. Schaller,P. Schäfer,L. Schimpf,M. Schlösser,L. Schlüter,M. Schrank,B. Schulz,M. Šefčík,H. Seitz-Moskaliuk,V. Sibille,D. Siegmann,M. Slezák,F. Spanier,M. Steidl,M. Sturm,M. Sun,H. H. Telle,T. Thümmler,L. A. Thorne,N. Titov,I. Tkachev,N. Trost,D. Vénos,K. Valerius,A. P. Vizcaya Hernández,S. Wüstling,M. Weber,C. Weinheimer,C. Weiss,S. Welte,J. Wendel,J. F. Wilkerson,J. Wolf,W. Xu,Y.-R. Yen,S. Zadoroghny,G. Zeller;KATRIN Collaboration;M. Aker;K. Altenmüller;A. Beglarian;J. Behrens;A. Berlev;U. Besserer;B. Bieringer;K. Blaum;F. Block;B. Bornschein;M. Böttcher;T. Brunst;T. S. Caldwell;L. La Cascio;S. Chilingaryan;W. Choi;D. Díaz Barrero;K. Debowski;M. Deffert;M. Descher;P. J. Doe;O. Dragoun;G. Drexlin;S. Dyba;F. Edzards;K. Eitel;E. Ellinger;R. Engel;S. Enomoto;M. Fedkevych;A. Felden;J. A. Formaggio;F. M. Fränkle;G. B. Franklin;F. Friedel;A. Fulst;K. Gauda;W. Gil;F. Glück;R. Grössle;R. Gumbsheimer;T. Höhn;V. Hannen;N. Haußmann;K. Helbing;S. Hickford;R. Hiller;D. Hillesheimer;D. Hinz;T. Houdy;A. Huber;A. Jansen;L. Köllenberger;C. Karl;J. Kellerer;L. Kippenbrock;M. Klein;A. Kopmann;M. Korzeczek;A. Kovalík;B. Krasch;H. Krause;T. Lasserre;T. L. Le;O. Lebeda;N. Le Guennic;B. Lehnert;A. Lokhov;J. M. Lopez Poyato;K. Müller;M. Machatschek;E. Malcherek;M. Mark;A. Marsteller;E. L. Martin;C. Melzer;S. Mertens;S. Niemes;P. Oelpmann;A. Osipowicz;D. S. Parno;A. W. P. Poon;F. Priester;M. Röllig;C. Röttele;O. Rest;R. G. H. Robertson;C. Rodenbeck;M. Ryšavý;R. Sack;A. Saenz;A. Schaller;P. Schäfer;L. Schimpf;M. Schlösser;L. Schlüter;M. Schrank;B. Schulz;M. Šefčík;H. Seitz-Moskaliuk;V. Sibille;D. Siegmann;M. Slezák;F. Spanier;M. Steidl;M. Sturm;M. Sun;H. H. Telle;T. Thümmler;L. A. Thorne;N. Titov;I. Tkachev;N. Trost;D. Vénos;K. Valerius;A. P. Vizcaya Hernández;S. Wüstling;M. Weber;C. Weinheimer;C. Weiss;S. Welte;J. Wendel;J. F. Wilkerson;J. Wolf;W. Xu;Y.-R. Yen;S. Zadoroghny;G. Zeller;
Journal physical review letters
Year 2021
DOI
10.5445/ir/1000130796
URL
https://sciprofiles.com/publication/view/fb0e6b5dfcae31221535ef0ea6d77194
Keywords
Science bound katrin sterile neutrino mixing active sterile neutrino

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