| Title: |
Search for heavy neutral leptons in $π^+$ decays to positrons |
| Authors: |
Bloch-Devaux, Brigitte; Cortina Gil, Eduardo; Minucci, Elisa; Padolski, Sergey; Petrov, Plamen; Numao, Toshio; Petrov, Yevgeniy; Velghe, Bob; Wong, Vincent Wai Sum; Shang, Victor; Bryman, Douglas; Fu, Ji; Hives, Zdenko; Husek, Tomas; Jerhot, Jan; Kampf, Karol; Kolesar, Marian; Zamkovsky, Michal; de Martino, Bianca; Perrin-Terrin, Mathieu; Petit, Lucie; Döbrich, Babette; Lezki, Samet; Schubert, Jonathan; Mukhamejanov, Yerzhan; Mukhamejanova, Assel; Saduyev, Nurzhan; Sakhiyev, Sayabek; Aliberti, Riccardo; Khoriauli, Gia; Kunze, Jonas; Lomidze, David; Marchevski, Radoslav; Peruzzo, Letizia; Polivka, Celia; Vormstein, Mario; Wanke, Rainer; Dalpiaz, Pietro; Fiorini, Massimiliano; Gamberini, Enrico; Gianoli, Alberto; Canale, Nicola; Neri, Ilaria; Norton, Alan; Petrucci, Ferruccio; Wahl, Heinrich; Bizzeti, Andrea; Bucci, Francesca; Iacopini, Enrico; Latino, Giuseppe; Lenti, Massimo; Parenti, Andrea; Antonelli, Antonella; Gonnella, Francesco; Lamanna, Gianluca; Lanfranchi, Gaia; Tinti, Gemma; Martellotti, Silvia; Moulson, Matthew; Kozhuharov, Venelin; Litov, Leandar; Georgiev, Georgi; Plini, Leonardo; Raggi, Mauro; Spadaro, Tommaso; Ambrosino, Fabio; Fiorenza, Renato; Capussela, Tiziana; Corvino, Michele; Di Filippo, Domenico; Massarotti, Paolo; Mirra, Marco; Napolitano, Marco; Saracino, Giulio; Anzivino, Giuseppina; Imbergamo, Ermanno; Lollini, Riccardo; Santoni, Cristiano; Brizioli, Francesco; Barbanera, Mattia; Cenci, Patrizia; Checcucci, Bruno; Duk, Viacheslav; Lupi, Matteo; Pepe, Monica; Piccini, Mauro; Lubrano, Pasquale; Costantini, Flavio; Doble, Niels; Giorgi, Marcello; Giudici, Sergio; Lari, Enrico; Pinzino, Jacopo; Pontisso, Luca; Sozzi, Marco; Di Lella, Luigi; Mannelli, Italo; Cerri, Claudio; Fantechi, Riccardo; Pedreschi, Elena; Piandani, Roberto; Spinella, Franco; Biagioni, Andrea; d'Agostini, Giulio; Leonardi, Emanuele; Lonardo, Alessandro; Valente, Paolo; Vicini, Piero; Cretaro, Paolo; Turisini, Matteo; Frezza, Ottorino; Ammendola, Roberto; Bonaiuto, Vincenzo; de Simone, Nicola; Federici, Luca; Fucci, Adolfo; Salamon, Andrea; Sargeni, Fausto; Arcidiacono, Roberta; Biino, Cristina; Boretto, Marco; Filippi, Alessandra; Iacobuzio, Lorenza; Marchetto, Flavio; Menichetti, Ezio; Migliore, Ernesto; Soldi, Dario; Engelfried, Jürgen; Estrada-Tristan, Nora; Bragadireanu, Alexandru Mario; Ghinescu, Stefan Alexandru; Hutanu, Ovidiu Emanuel; Enik, Temur; Falaleev, Valeri; Kekelidze, Vladimir; Korotkova, Anna; Madigozhin, Dmitry; Misheva, Milena; Molokanova, Natalia; Movchan, Sergei; Polenkevich, Irina; Potrebenikov, Yuri; Shkarovskiy, Sergey; Zinchenko, Andrey; Baeva, Aigul; Baigarashev, Dosbol; Emelyanov, Dmitry; Fedotov, Sergei; Khotyantsev, Alexey; Gushchin, Evgeny; Kleimenova, Alina; Kudenko, Yury; Kurochka, Viktoriia; Medvedeva, Mariia; Mefodev, Aleksandr; Kholodenko, Sergey; Kurshetsov, Viktor; Obraztsov, Vladimir; Ostankov, Aleksandr; Semenov, Vitali; Sugonyaev, Valentin; Yushchenko, Oleg; Bician, Lubos; Blazek, Tomas; Cerny, Vladimir; Koval, Michal; Kucerova, Zuzana; Ceccucci, Augusto; Bernhard, Johannes; Danielsson, Hans; Duval, Francois; Gatignon, Lau; Guida, Roberto; Hahn, Ferdinand; Holzer, Eva Barbara; Jenninger, Berthold; Laycock, Paul; Lehmann Miotto, Giovanna; Lichard, Peter; Mapelli, Alessandro; Noy, Matthew; Palladino, Vito; Ruggiero, Giuseppe; Ryjov, Vladimir; Schuchmann, Simone; Venditti, Stefano; Brunetti, Maria Brigida; Bache, Thomas; Goudzovski, Evgueni; Henshaw, Jack; Tomczak, Adam; Lazzeroni, Cristina; Fascianelli, Valeria; Lurkin, Nicolas; Newson, Francis; Parkinson, Christopher; Romano, Angela; Sergi, Antonino; Sturgess, Andrew; Swallow, Joel; Heath, Helen; Page, Ryan; Trilov, Stoyan; Angelucci, Bruno; Britton, David; Protopopescu, Dan; Graham, Connor; Jones, Roger William Lewis; Dainton, John Bourke; Fry, John Richard; Fulton, Liam; Hutchcroft, David; Carmignani, Joseph; Massri, Karim; Maurice, Emilie; Wrona, Bozydar; Conovaloff, Adam; Cooper, Peter; Coward, David; Rubin, Philip David; Akmete, Atakan Tugberk; Soldani, Mattia; Bandiera, Laura; Negrello, Riccardo; Romagnoni, Marco; Panichi, Ilaria; Lo Chiatto, Prisco; d'Errico, Mariaelena; Giordano, Raffaele; Briano Olvera, Alejandro; Reyes Santos, Marco Antonio; Boboc, Petre; Kereibay, Dias; Gorshanov, Konstantin; Okhotnikov, Artem; Sadovskiy, Alexander; Sanders, Jack; Sam, Ceyhan; Kenworthy, Chandler; Rosa, Ilaria; Ceoletta, Marco; Rodriguez Rivera, Kevin Alexander; Chang, Xiafei; Bautin, Vitalii; Salamatin, Kirill; Velas, Tomas; Francesconi, Marco; Shaikhiev, Artur; Volpe, Roberta |
| Contributors: |
Centre de Physique des Particules de Marseille (CPPM); Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS); Laboratoire Leprince-Ringuet (LLR); Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X); Institut Polytechnique de Paris (IP Paris)-Institut Polytechnique de Paris (IP Paris)-Centre National de la Recherche Scientifique (CNRS); NA62 |
| Source: |
Phys.Lett.B ; https://hal.science/hal-05178549 ; Phys.Lett.B, 2026, 872, pp.140119. ⟨10.1016/j.physletb.2025.140119⟩ |
| Publisher Information: |
CCSD |
| Publication Year: |
2026 |
| Collection: |
Aix-Marseille Université: HAL |
| Subject Terms: |
[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] |
| Description: |
International audience ; A search for heavy neutral lepton ($N$) production in $π^+\to e^+ N$ in-flight decays using data collected by the NA62 experiment at CERN in 2017-2024 is reported. Upper limits for the extended neutrino mixing matrix element $|U_{e4}|^2$ are established at the level of $10^{-8}$ for heavy neutral leptons with mass in the range 95-126 $MeV/c^2$ and lifetime exceeding 50 ns. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| Relation: |
info:eu-repo/semantics/altIdentifier/arxiv/2507.07345; ARXIV: 2507.07345; INSPIRE: 2944744 |
| DOI: |
10.1016/j.physletb.2025.140119 |
| Availability: |
https://hal.science/hal-05178549; https://doi.org/10.1016/j.physletb.2025.140119 |
| Accession Number: |
edsbas.A134A7A7 |
| Database: |
BASE |