Sterile-neutrino search based on 259 days of KATRIN data

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Main Authors:	Acharya, Himal, Aker, Max, Batzler, Dominic, Beglarian, Armen, Beisenkötter, Justus, Biassoni, Matteo, Bieringer, Benedikt, Biondi, Yanina, Böttcher, Matthias, Bornschein, Beate, Bornschein, Lutz, Carminati, Marco, Chatrabhuti, Auttakit, Chilingaryan, Suren, Barrero, Deseada Díaz, Daniel, Byron A., Descher, Martin, Dragoun, Otokar, Drexlin, Guido, Edzards, Frank, Eitel, Klaus, Ellinger, Enrico, Engel, Ralph, Enomoto, Sanshiro, Fallböhmer, Luca, Felden, Arne, Fengler, Caroline, Fiorini, Carlo, Formaggio, Joseph A., Forstner, Christian, Fränkle, Florian M., Gagliardi, Giulio, Gauda, Kevin, Gavin, Andrew S., Gil, Woosik, Glück, Ferenc, Grössle, Robin, Höhn, Thomas, Habib, Khushbakht, Hannen, Volker, Haßelmann, Leonard, Helbing, Klaus, Henke, Hanna, Heyns, Svenja, Hiller, Roman, Hillesheimer, David, Hinz, Dominic, Jansen, Alexander, Köhler, Christoph, Khosonthongkee, Khanchai, Kohpeiß, Joshua, Köllenberger, Leonard, Kopmann, Andreas, Kovač, Neven, La Cascio, Luisa, Laschinger, Leo, Lasserre, Thierry, Lauer, Joscha, Le, Thanh-Long, Lebeda, Ondřej, Lehnert, Bjoern, Lokhov, Alexey, Machatschek, Moritz, Marsteller, Alexander, Martin, Eric L., McMichael, Kirsten, Melzer, Christin, Mettler, Lukas Erik, Mertens, Susanne, Mohanty, Shailaja, Mostafa, Jalal, Müller, Immanuel, Nava, Andrea, Neumann, Holger, Niemes, Simon, Nutini, Irene, Onillon, Anthony, Parno, Diana S., Pavan, Maura, Pinsook, Udomsilp, Plößner, Jan, Poon, Alan W. P., Poyato, Jose Manuel Lopez, Priester, Florian, Ráliš, Jan, Röllig, Marco, Ramachandran, Shivani, Robertson, R G. Hamish, Rodenbeck, Caroline, Sack, Rudolf, Saenz, Alejandro, Salomon, Richard, Schürmann, Jannis, Schäfer, Peter, Schütz, Ann-Kathrin, Schlösser, Magnus, Schlüter, Lisa, Schneidewind, Sonja, Schnurr, Ulrich, Schwemmer, Alessandro, Schwenck, Adrian, Šefčík, Michal, Seeyangnok, Jakkapat, Siegmann, Daniel, Simon, Frank, Songwadhana, Julanan, Spanier, Felix, Spreng, Daniela, Sreethawong, Warintorn, Steidl, Markus, Štorek, Jaroslav, Stribl, Xaver, Sturm, Michael, Suwonjandee, Narumon, Jerome, Nicholas Tan, Telle, Helmut H. H., Thümmler, Thomas, Thorne, Larisa A., Titov, Nikita, Tkachev, Igor, Trost, Kerstin, Urban, Korbinian, Vénos, Drahoš, Valerius, Kathrin, Wüstling, Sascha, Weinheimer, Christian, Welte, Stefan, Wendel, Jürgen, Wiesinger, Christoph, Wilkerson, John F., Wolf, Joachim, Wydra, Johanna, Xu, Weiran, Zadorozhny, Sergey, Zeller, Genrich
Format:	Preprint
Published:	2025
Subjects:	High Energy Physics - Experiment
Online Access:	Acceder al recurso
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_version_	1866917967082553344
author	Acharya, Himal Aker, Max Batzler, Dominic Beglarian, Armen Beisenkötter, Justus Biassoni, Matteo Bieringer, Benedikt Biondi, Yanina Böttcher, Matthias Bornschein, Beate Bornschein, Lutz Carminati, Marco Chatrabhuti, Auttakit Chilingaryan, Suren Barrero, Deseada Díaz Daniel, Byron A. Descher, Martin Dragoun, Otokar Drexlin, Guido Edzards, Frank Eitel, Klaus Ellinger, Enrico Engel, Ralph Enomoto, Sanshiro Fallböhmer, Luca Felden, Arne Fengler, Caroline Fiorini, Carlo Formaggio, Joseph A. Forstner, Christian Fränkle, Florian M. Gagliardi, Giulio Gauda, Kevin Gavin, Andrew S. Gil, Woosik Glück, Ferenc Grössle, Robin Höhn, Thomas Habib, Khushbakht Hannen, Volker Haßelmann, Leonard Helbing, Klaus Henke, Hanna Heyns, Svenja Hiller, Roman Hillesheimer, David Hinz, Dominic Jansen, Alexander Köhler, Christoph Khosonthongkee, Khanchai Kohpeiß, Joshua Köllenberger, Leonard Kopmann, Andreas Kovač, Neven La Cascio, Luisa Laschinger, Leo Lasserre, Thierry Lauer, Joscha Le, Thanh-Long Lebeda, Ondřej Lehnert, Bjoern Lokhov, Alexey Machatschek, Moritz Marsteller, Alexander Martin, Eric L. McMichael, Kirsten Melzer, Christin Mettler, Lukas Erik Mertens, Susanne Mohanty, Shailaja Mostafa, Jalal Müller, Immanuel Nava, Andrea Neumann, Holger Niemes, Simon Nutini, Irene Onillon, Anthony Parno, Diana S. Pavan, Maura Pinsook, Udomsilp Plößner, Jan Poon, Alan W. P. Poyato, Jose Manuel Lopez Priester, Florian Ráliš, Jan Röllig, Marco Ramachandran, Shivani Robertson, R G. Hamish Rodenbeck, Caroline Sack, Rudolf Saenz, Alejandro Salomon, Richard Schürmann, Jannis Schäfer, Peter Schütz, Ann-Kathrin Schlösser, Magnus Schlüter, Lisa Schneidewind, Sonja Schnurr, Ulrich Schwemmer, Alessandro Schwenck, Adrian Šefčík, Michal Seeyangnok, Jakkapat Siegmann, Daniel Simon, Frank Songwadhana, Julanan Spanier, Felix Spreng, Daniela Sreethawong, Warintorn Steidl, Markus Štorek, Jaroslav Stribl, Xaver Sturm, Michael Suwonjandee, Narumon Jerome, Nicholas Tan Telle, Helmut H. H. Thümmler, Thomas Thorne, Larisa A. Titov, Nikita Tkachev, Igor Trost, Kerstin Urban, Korbinian Vénos, Drahoš Valerius, Kathrin Wüstling, Sascha Weinheimer, Christian Welte, Stefan Wendel, Jürgen Wiesinger, Christoph Wilkerson, John F. Wolf, Joachim Wydra, Johanna Xu, Weiran Zadorozhny, Sergey Zeller, Genrich
author_facet	Acharya, Himal Aker, Max Batzler, Dominic Beglarian, Armen Beisenkötter, Justus Biassoni, Matteo Bieringer, Benedikt Biondi, Yanina Böttcher, Matthias Bornschein, Beate Bornschein, Lutz Carminati, Marco Chatrabhuti, Auttakit Chilingaryan, Suren Barrero, Deseada Díaz Daniel, Byron A. Descher, Martin Dragoun, Otokar Drexlin, Guido Edzards, Frank Eitel, Klaus Ellinger, Enrico Engel, Ralph Enomoto, Sanshiro Fallböhmer, Luca Felden, Arne Fengler, Caroline Fiorini, Carlo Formaggio, Joseph A. Forstner, Christian Fränkle, Florian M. Gagliardi, Giulio Gauda, Kevin Gavin, Andrew S. Gil, Woosik Glück, Ferenc Grössle, Robin Höhn, Thomas Habib, Khushbakht Hannen, Volker Haßelmann, Leonard Helbing, Klaus Henke, Hanna Heyns, Svenja Hiller, Roman Hillesheimer, David Hinz, Dominic Jansen, Alexander Köhler, Christoph Khosonthongkee, Khanchai Kohpeiß, Joshua Köllenberger, Leonard Kopmann, Andreas Kovač, Neven La Cascio, Luisa Laschinger, Leo Lasserre, Thierry Lauer, Joscha Le, Thanh-Long Lebeda, Ondřej Lehnert, Bjoern Lokhov, Alexey Machatschek, Moritz Marsteller, Alexander Martin, Eric L. McMichael, Kirsten Melzer, Christin Mettler, Lukas Erik Mertens, Susanne Mohanty, Shailaja Mostafa, Jalal Müller, Immanuel Nava, Andrea Neumann, Holger Niemes, Simon Nutini, Irene Onillon, Anthony Parno, Diana S. Pavan, Maura Pinsook, Udomsilp Plößner, Jan Poon, Alan W. P. Poyato, Jose Manuel Lopez Priester, Florian Ráliš, Jan Röllig, Marco Ramachandran, Shivani Robertson, R G. Hamish Rodenbeck, Caroline Sack, Rudolf Saenz, Alejandro Salomon, Richard Schürmann, Jannis Schäfer, Peter Schütz, Ann-Kathrin Schlösser, Magnus Schlüter, Lisa Schneidewind, Sonja Schnurr, Ulrich Schwemmer, Alessandro Schwenck, Adrian Šefčík, Michal Seeyangnok, Jakkapat Siegmann, Daniel Simon, Frank Songwadhana, Julanan Spanier, Felix Spreng, Daniela Sreethawong, Warintorn Steidl, Markus Štorek, Jaroslav Stribl, Xaver Sturm, Michael Suwonjandee, Narumon Jerome, Nicholas Tan Telle, Helmut H. H. Thümmler, Thomas Thorne, Larisa A. Titov, Nikita Tkachev, Igor Trost, Kerstin Urban, Korbinian Vénos, Drahoš Valerius, Kathrin Wüstling, Sascha Weinheimer, Christian Welte, Stefan Wendel, Jürgen Wiesinger, Christoph Wilkerson, John F. Wolf, Joachim Wydra, Johanna Xu, Weiran Zadorozhny, Sergey Zeller, Genrich
contents	Neutrinos are the most abundant fundamental matter particles in the Universe and play a crucial role in particle physics and cosmology. Neutrino oscillation, discovered about 25 years ago, reveals that the three known species mix with each other. Anomalous results from reactor and radioactive-source experiments suggest a possible fourth neutrino state, the sterile neutrino, which does not interact via the weak force. The KATRIN experiment, primarily designed to measure the neutrino mass via tritium $β$-decay, also searches for sterile neutrinos suggested by these anomalies. A sterile-neutrino signal would appear as a distortion in the $β$-decay energy spectrum, characterized by a discontinuity in curvature (kink) related to the sterile-neutrino mass. This signature, which depends only on the shape of the spectrum rather than its absolute normalization, offers a robust, complementary approach to reactor experiments. KATRIN examined the energy spectrum of 36 million tritium $β$-decay electrons recorded in 259 measurement days within the last 40 electronvolt below the endpoint. The results exclude a substantial part of the parameter space suggested by the gallium anomaly and challenge the Neutrino-4 claim. Together with other neutrino-disappearance experiments, KATRIN probes sterile-to-active mass splittings from a fraction of an electron-volt squared to several hundred electron-volts squared, excluding light sterile neutrinos with mixing angles above a few percent.
format	Preprint
id	arxiv_https___arxiv_org_abs_2503_18667
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	Sterile-neutrino search based on 259 days of KATRIN data Acharya, Himal Aker, Max Batzler, Dominic Beglarian, Armen Beisenkötter, Justus Biassoni, Matteo Bieringer, Benedikt Biondi, Yanina Böttcher, Matthias Bornschein, Beate Bornschein, Lutz Carminati, Marco Chatrabhuti, Auttakit Chilingaryan, Suren Barrero, Deseada Díaz Daniel, Byron A. Descher, Martin Dragoun, Otokar Drexlin, Guido Edzards, Frank Eitel, Klaus Ellinger, Enrico Engel, Ralph Enomoto, Sanshiro Fallböhmer, Luca Felden, Arne Fengler, Caroline Fiorini, Carlo Formaggio, Joseph A. Forstner, Christian Fränkle, Florian M. Gagliardi, Giulio Gauda, Kevin Gavin, Andrew S. Gil, Woosik Glück, Ferenc Grössle, Robin Höhn, Thomas Habib, Khushbakht Hannen, Volker Haßelmann, Leonard Helbing, Klaus Henke, Hanna Heyns, Svenja Hiller, Roman Hillesheimer, David Hinz, Dominic Jansen, Alexander Köhler, Christoph Khosonthongkee, Khanchai Kohpeiß, Joshua Köllenberger, Leonard Kopmann, Andreas Kovač, Neven La Cascio, Luisa Laschinger, Leo Lasserre, Thierry Lauer, Joscha Le, Thanh-Long Lebeda, Ondřej Lehnert, Bjoern Lokhov, Alexey Machatschek, Moritz Marsteller, Alexander Martin, Eric L. McMichael, Kirsten Melzer, Christin Mettler, Lukas Erik Mertens, Susanne Mohanty, Shailaja Mostafa, Jalal Müller, Immanuel Nava, Andrea Neumann, Holger Niemes, Simon Nutini, Irene Onillon, Anthony Parno, Diana S. Pavan, Maura Pinsook, Udomsilp Plößner, Jan Poon, Alan W. P. Poyato, Jose Manuel Lopez Priester, Florian Ráliš, Jan Röllig, Marco Ramachandran, Shivani Robertson, R G. Hamish Rodenbeck, Caroline Sack, Rudolf Saenz, Alejandro Salomon, Richard Schürmann, Jannis Schäfer, Peter Schütz, Ann-Kathrin Schlösser, Magnus Schlüter, Lisa Schneidewind, Sonja Schnurr, Ulrich Schwemmer, Alessandro Schwenck, Adrian Šefčík, Michal Seeyangnok, Jakkapat Siegmann, Daniel Simon, Frank Songwadhana, Julanan Spanier, Felix Spreng, Daniela Sreethawong, Warintorn Steidl, Markus Štorek, Jaroslav Stribl, Xaver Sturm, Michael Suwonjandee, Narumon Jerome, Nicholas Tan Telle, Helmut H. H. Thümmler, Thomas Thorne, Larisa A. Titov, Nikita Tkachev, Igor Trost, Kerstin Urban, Korbinian Vénos, Drahoš Valerius, Kathrin Wüstling, Sascha Weinheimer, Christian Welte, Stefan Wendel, Jürgen Wiesinger, Christoph Wilkerson, John F. Wolf, Joachim Wydra, Johanna Xu, Weiran Zadorozhny, Sergey Zeller, Genrich High Energy Physics - Experiment Neutrinos are the most abundant fundamental matter particles in the Universe and play a crucial role in particle physics and cosmology. Neutrino oscillation, discovered about 25 years ago, reveals that the three known species mix with each other. Anomalous results from reactor and radioactive-source experiments suggest a possible fourth neutrino state, the sterile neutrino, which does not interact via the weak force. The KATRIN experiment, primarily designed to measure the neutrino mass via tritium $β$-decay, also searches for sterile neutrinos suggested by these anomalies. A sterile-neutrino signal would appear as a distortion in the $β$-decay energy spectrum, characterized by a discontinuity in curvature (kink) related to the sterile-neutrino mass. This signature, which depends only on the shape of the spectrum rather than its absolute normalization, offers a robust, complementary approach to reactor experiments. KATRIN examined the energy spectrum of 36 million tritium $β$-decay electrons recorded in 259 measurement days within the last 40 electronvolt below the endpoint. The results exclude a substantial part of the parameter space suggested by the gallium anomaly and challenge the Neutrino-4 claim. Together with other neutrino-disappearance experiments, KATRIN probes sterile-to-active mass splittings from a fraction of an electron-volt squared to several hundred electron-volts squared, excluding light sterile neutrinos with mixing angles above a few percent.
title	Sterile-neutrino search based on 259 days of KATRIN data
topic	High Energy Physics - Experiment
url	https://arxiv.org/abs/2503.18667