2026
article
Measurement of the branching ratio of the $K^+\to\pi^+\nu\bar{\nu}$ decay
Samuel Alibocus, B. Bloch-Devaux, Eduardo Cortina Gil, N. Lurkin, Douglas Bryman, T. Numao, B. Velghe, V. W. S. Wong, Victor Shang, L. Bician, Z. Hives, T. Husek, Karol Kampf, Marián Kolesár, M. Koval, Elizabeth Long, M. Ćirković, Michal Lelák, M. Perrin‐Terrin, B. De Martino, Lucie Petit, Babette Döbrich, Daniel Grewe, J. Jerhot, Samet Lezki, Jonathan Schubert, Atakan Tugberk Akmete, Riccardo Aliberti, M. Ceoletta, Niels Doble, Luigi Di Lella, L. Peruzzo, Celia Polivka, Simone Schuchmann, Heinrich Wahl, R. Wanke, P. Fedeli, R. Negrello, Ilaria Neri, Ferruccio Petrucci, L. Bandiera, N. Canale, A. Gianoli, Marco Romagnoni, Andrea Bizzeti, Francesca Bucci, Massimo Lenti, G. Ruggiero, Ilaria Panichi, Prisco Lo Chiatto, Antonella Antonelli, Venelin Kozhuharov, Gaia Lanfranchi, S. Martellotti, Matthew Moulson, Leonardo Plini, Mattia Soldani, Tommaso Spadaro, Joel Swallow, G. Tinti, F. Ambrosino, Mariaelena D'Errico, Renato Fiorenza, M. Francesconi, Raffaele Giordano, Paolo Massarotti, M. Mirra, Marco Napolitano, I. Rosa, G. Saracino, Giuseppina Anzivino, P. Cenci, Viacheslav Duk, Valeri Falaleev, R. Lollini, Monica Pepe, Mauro Piccini, Pasquale Lubrano, Flavio Costantini, Marcello Giorgi, Sergio Giudici, Enrico Lari, J. Pinzino, G. Lamanna, Elena Pedreschi, Marco Sozzi, I. Mannelli, Riccardo Fantechi, Sergey Kholodenko, Franco Spinella, Carlotta Chiarini, M. Raggi, Cristian Rossi, A. Biagioni, A. Lonardo, L. Pontisso, P. Vicini, Paolo Cretaro, Matteo Turisini, Ottorino Frezza, Francesca Lo Cicero, Francesco Simula, Roberto Ammendola, Vincenzo Bonaiuto, A. Fucci, Á. Salamon, F. Sargeni, Roberta Arcidiacono, Ezio Menichetti, Ernesto Migliore, Cristina Biino, A. Filippi, F. Marchetto, Dario Soldi, Yerzhan Mukhamejanov, Assel Mukhamejanova, Nurzhan Saduyev, Sayabek Sakhiyev, Alejandro Briano Olvera, J. Engelfried, Nora Estrada-Tristan, Marco Antonio Reyes Santos, Alan Efrain Martínez Hernández, Akbar Emmanuel Díaz Rodarte, R. Piandani, Carlos Alfredo Rico Olvera, Kevin Alexander Rodriguez Rivera, P. Boboc, A.M. Bragadireanu, S. A. Ghinescu, Ovidiu Emanuel Hutanu, A. Baeva, D. Baigarashev, V. Bautin, D. Emelyanov, T. Enik, Vladimir Kekelidze, Anna Korotkova, D. Madigozhin, Milena Misheva, Natalia Molokanova, D. Kereibay, I. Polenkevich, Yuri Potrebenikov, K. Salamatin, S. Shkarovskiy, Leandar Litov, S. Fedotov, Alexey Khotyantsev, K. Gorshanov, Evgeny Gushchin, Yury Kudenko, V. Kurochka, Aleksandr Mefodev, V. Kurshetsov, Vladimir Obraztsov, Artem Okhotnikov, Alexander Sadovskiy, V. Sugonyaev, Oleg Yushchenko, Tomas Blazek, Vladimir Cerny, Tomas Velas, R. Volpe, Johannes Bernhard, M. Boretto, F. Brizioli, Augusto Ceccucci, M. Corvino, Hans Danielsson, Zuzana Kucerova, François Duval, L. Federici, Enrico Gamberini, Roberto Guida, Eva Barbara Holzer, Berthold Jenninger, Giovanna Lehmann Miotto, Peter Lichard, Elisa Minucci, Matthew Noy, V. Ryjov, Michal Zamkovsky, Radoslav Marchevski, Giacomo Belleri, Xiafei Chang, Luis Miguel Garcia Martin, Alina Kleimenova, J. R. Fry, Francesco Gonnella, E. Goudzovski, Jack Henshaw, Chandler Kenworthy, Cristina Lazzeroni, Christopher Parkinson, Angela Romano, J. Sanders, Ceyhan Sam, Antonino Sergi, Adam Tomczak, Helen Heath, David Britton, Alan Norton, D. Protopopescu, Jamimah Cook, Maria Domenica Galati, L. Gatignon, Roger William Lewis Jones, John Bourke Dainton, K. Massri, Artur Shaikhiev, Max Thompson-Walker, Peter Cooper, David Coward, Philip David Rubin
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Le résumé fourni par la source
The NA62 experiment has measured the branching ratio of the rare decay $K^+\to\pi^+\nu\bar{\nu}$ using data collected in 2023 and 2024 at the CERN SPS, obtaining $\mathcal{B}_{\rm 2023-2024}(K^+\to\pi^+\nu\bar{\nu}) = \left(7.2^{+2.3}_{-2.1}\right)\times10^{-11}$. With results from data collected between 2016 and 2022, the analysis gives $\mathcal{B}_{\rm 2016-2024}(K^+\to\pi^+\nu\bar{\nu}) = \left(9.6^{+1.9}_{-1.8}\right)\times10^{-11}$, corresponding to a relative precision of 20\%. This value is consistent with Standard Model predictions.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
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Les sujets associés
Particle physics theoretical and experimental studiesQuantum Chromodynamics and Particle InteractionsNeutrino Physics Research