| Title: |
Measurement of the K⁺ → π⁺γγ decay |
| Authors: |
Cortina Gil, Eduardo; Minucci, Elisa; Padolski, Sergey; Petrov, Plamen; Velghe, Bob; Bryman, Douglas A.; Fu, Ji; Numao, Toshio; Petrov, Yevgeniy; Wong, Vincent Wai Sum; Husek, Tomas; Kampf, Karol; Zamkovsky, Michal; Jerhot, Jan; Aliberti, Riccardo; Khoriauli, Gia; Kunze, Jonas; Lomidze, David; 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; Tinti, Gemma; Martellotti, Silvia; Moulson, Matthew; Kozhuharov, Venelin Valeriev; Litov, Leandar; Georgiev, Georgi; 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; 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; Černý, Vladimír; 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; 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; Hives, Zdenko; Akmete, Atakan Tugberk; Soldani, Mattia; Bandiera, Laura; Mazzolari, Andrea; Romagnoni, Marco; Sytov, Alexei; 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; Kenworthy, Chandler; De Martino, Bianca; Rosa, Ilaria; Ceoletta, Marco; Rodriguez Rivera, Kevin Alexander; Lezki, Samet |
| Publication Year: |
2024 |
| Collection: |
Publication Server of Goethe University Frankfurt am Main |
| Subject Terms: |
ddc:530 |
| Description: |
A sample of 3984 candidates of the 𝐾+ → 𝜋+𝛾𝛾 decay, with an estimated background of 291 ± 14 events, was collected by the NA62 experiment at CERN during 2017–2018. In order to describe the observed di-photon mass spectrum, the next-to-leading order contribution in chiral perturbation theory was found to be necessary. The decay branching ratio in the full kinematic range is measured to be (9.61 ± 0.17) × 10−7. The first search for production and prompt decay of an axion-like particle with gluon coupling in the process 𝐾+ → 𝜋+𝑎, 𝑎 → 𝛾𝛾 is also reported. |
| Document Type: |
article in journal/newspaper |
| File Description: |
application/pdf |
| Language: |
English |
| Relation: |
https://doi.org/10.1016/j.physletb.2024.138513 |
| DOI: |
10.1016/j.physletb.2024.138513 |
| Availability: |
http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/94924; https://nbn-resolving.org/urn:nbn:de:hebis:30:3-949241; https://doi.org/10.1016/j.physletb.2024.138513; http://publikationen.ub.uni-frankfurt.de/files/94924/1-s2.0-S0370269324000716-main.pdf |
| Rights: |
https://creativecommons.org/licenses/by/4.0/deed.de ; info:eu-repo/semantics/openAccess |
| Accession Number: |
edsbas.F2F8EBB |
| Database: |
BASE |