| Title: |
Measurement of the very rare K+ → π+νν¯ decay |
| Authors: |
Cortina Gil, Eduardo; Minucci, Elisa; Padolski, Sergey; Petrov, Plamen; Velghe, Bob; Bryman, Douglas A.; Fu, Ji; Numao, Toshio; Petrov, Yevgeniy; Husek, Tomas; Kampf, Karol; Zamkovsky, Michal; Jerhot, Jan; Aliberti, Riccardo; Khoriauli, Gia; Kunze, Jonas; Lomidze, David; Potrebenikov, Yury; Marchevski, Radoslav Ivanov; Peruzzo, Letizia; Vormstein, Mario Christian; Wanke, Rainer; Cotta Ramusino, Angelo; Dalpiaz, Pietro; Fiorini, Massimiliano; Gamberini, Enrico; Gianoli, Alberto; Neri, Ilaria; Norton, Alan; Petrucci, Ferruccio; Wahl, Heinrich; Bizzeti, Andrea; Bucci, Francesca; Iacopini, Enrico; Latino, Giuseppe; Lenti, Massimo; Parenti, Andrea; Volpe, Roberta; Antonelli, Antonella; Gonnella, Francesco; Lamanna, Gianluca; Lanfranchi, Gaia; Martellotti, Silvia; Moulson, Matthew; Kozhuharov, Venelin; Litov, Leandar; Georgiev, Georgi; Raggi, Mauro; Spadaro, Tommaso; Ambrosino, Fabio; 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; Ammendola, Roberto; Bonaiuto, Vincenzo; De Simone, Nicola; Federici, Luca; Fucci, Adolfo; Salamon, Andrea; Sargeni, Fausto; Arcidiacono, Roberta; Biino, Cristina; Bloch-Devaux, Brigitte; 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; Shaikhiev, Artur; 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; Döbrich, Babette; 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; Perrin-Terrin, Mathieu; Ruggiero, Giuseppe; Ryjov, Vladimir; Schuchmann, Simone; Venditti, Stefano; Brunetti, Maria Brigida; Bache, Thomas; Goudzovski, Evgueni; Henshaw, Jack; 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 |
| Publication Year: |
2021 |
| Collection: |
Publication Server of Goethe University Frankfurt am Main |
| Description: |
The NA62 experiment reports the branching ratio measurement BR(K+ →π+ν ¯ν) = (10.6+4.0−3.4|stat ± 0.9syst) × 10−11 at 68% CL, based on the observation of 20 signal candidates with an expected background of 7.0 events from the total data sample collected at the CERN SPS during 2016–2018. This provides evidence for the very rare K+ → π+ν ¯ν decay, observed with a significance of 3.4σ. The experiment achieves a single event sensitivity of (0.839 ± 0.054) × 10−11, corresponding to 10.0 events assuming the Standard Model branching ratio of (8.4 ± 1.0) × 10−11. This measurement is also used to set limits on BR(K+ → π+X), where X is a scalar or pseudo-scalar particle. Details are given of the analysis of the 2018 data sample, which corresponds to about 80% of the total data sample. |
| Document Type: |
article in journal/newspaper |
| File Description: |
application/pdf |
| Language: |
English |
| Relation: |
https://doi.org/10.1007/JHEP06(2021)093 |
| DOI: |
10.1007/JHEP06(2021)093 |
| Availability: |
http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/93125; https://nbn-resolving.org/urn:nbn:de:hebis:30:3-931254; https://doi.org/10.1007/JHEP06(2021)093; http://publikationen.ub.uni-frankfurt.de/files/93125/JHEP06_2021_093_1.pdf |
| Rights: |
http://creativecommons.org/licenses/by/4.0/ ; info:eu-repo/semantics/openAccess |
| Accession Number: |
edsbas.EBECD72C |
| Database: |
BASE |