| Title: |
Measurement of the K+ → π+γγ decay |
| Authors: |
Akmete, Atakan Tugberk; Aliberti, Riccardo; Ambrosino, Fabio; Ammendola, Roberto; Angelucci, Bruno; Antonelli, Antonella; Anzivino, Giuseppina; Arcidiacono, Roberta; Bache, Thomas; Baeva, Aigul; Baigarashev, Dosbol; Bandiera, Laura; Barbanera, Mattia; Bernhard, Johannes; Biagioni, Andrea; Bician, Lubos; Biino, Cristina; Bizzeti, Andrea; Blazek, Tomas; Bloch-Devaux, Brigitte; Boboc, Petre; Bonaiuto, Vincenzo; Boretto, Marco; Bragadireanu, Mario; Briano Olvera, Alejandro; Britton, David; Brizioli, F.; Brunetti, Maria Brigida; Bryman, Douglas; Bucci, Francesca; Capussela, Tiziana; Carmignani, Joseph (Joe); Ceccucci, Augusto; Cenci, Patrizia; Ceoletta, Marco; Cerny, Vladimir; Cerri, Claudio; Checcucci, Bruno; Conovaloff, Adam; Cooper, Peter; Cortina Gil, Eduardo; Corvino, Michele; Costantini, Flavio; Cotta Ramusino, Angelo; Coward, David; Cretaro, Paolo; D'Agostini, Giulio; D'Errico, Mariaelena; Dainton, John Bourke; Dalpiaz, Pietro; Danielsson, Hans; De Martino, B.; De Simone, N.; Di Filippo, Domenico; Di Lella, Luigi; Doble, Niels; Döbrich, Babette; Duk, Viacheslav; Duval, Francois; Emelyanov, Dmitry; Engelfried, Jurgen; Enik, Temur; Estrada Tristan, Nora Patricia; Falaleev, Valeri; Fantechi, Riccardo; Fascianelli, Valeria; Federici, Luca; Fedotov, S.; Filippi, Alessandra; Fiorenza, Renato; Fiorini, Massimiliano; Frezza, Ottorino; Fry, John; Fu, Ji; Fucci, A.; Fulton, Liam; Gamberini, Enrico; Gatignon, Lau; Georgiev, Georgi St.; Ghinescu, Stefan Alexandru; Gianoli, Alberto; Giordano, Raffaele; Giorgi, Marcello; Giudici, Sergio; Gonnella, Francesco; Gorshanov, Konstantin; Goudzovski, Evgueni; Graham, Connor; Guida, R.; Gushchin, Evgeny; Hahn, Ferdinand; Heath, Helen; Henshaw, Jack; Híveš, Zdenko; Holzer, Eva Barbara; Husek, Tomáš; Hutanu, Ovidiu Emanuel; Hutchcroft, David; Iacobuzio, Lorenza; Iacopini, Enrico; Imbergamo, Ermanno; Jenninger, Berthold; Jerhot, Jan; Jones, Roger; Kampf, Karol; Kekelidze, Vladimir; Kenworthy, Chandler; Kereibay, Dias; Kholodenko, Sergei; Khoriauli, Gia; Khotyantsev, Alexey; Kleimenova, Alina; Korotkova, Anna; Koval, Michal; Kozhuharov, Venelin; Kucerova, Zuzana; Kudenko, Yury; Kunze, Jonas; Kurochka, Viktoriia; Kurshetsov, Victor; Lamanna, Gianluca; Lanfranchi, Gaia; Lari, Enrico; Latino, Giuseppe; Laycock, Paul; Lazzeroni, Cristina; Lehmann Miotto, Giovanna; Lenti, Massimo; Leonardi, Emanuele; Lezki, Samet; Lichard, Peter; Litov, Leandar; Lo Chiatto, Prisco; Lollini, Riccardo; Lomidze, David; Lonardo, Alessandro; Lubrano, Pasquale; Lupi, Matteo; Lurkin, Nicolas; Madigozhin, Dmitry; Mannelli, Italo; Mapelli, Alessandro; Marchetto, Flavio Pietro; Marchevski, Radoslav; Martellotti, Silvia; Massarotti, Paolo; Massri, Karim; Maurice, Emilie; Mazzolari, Andrea; Medvedeva, Mariia; Mefodiev, Aleksandr; Menichetti, Ezio; Migliore, Ernesto; Minucci, Elisa; Mirra, Marco; Misheva, Milena; Molokanova, Natalia; Moulson, Matthew David; Movchan, Sergei; Napolitano, Marco; Neri, Ilaria; Newson, Francis; Norton, Alan; Noy, Matthew; Numao, Toshio; Obraztsov, Vladimir; Okhotnikov, Artem; Ostankov, Aleksandr; Padolski, Sergey; Page, Ryan; Palladino, Vito; Panichi, I.; Parenti, Andrea; Parkinson, Christopher John; Pedreschi, Elena; Pepe, Monica; Perrin-Terrin, Mathieu; Peruzzo, Letizia; Petrov, Plamen; Petrov, Yevgeniy; Petrucci, Ferruccio; Piandani, Roberto; Piccini, Mauro; Pinzino, Jacopo; Polenkevich, Irina; Pontisso, Luca; Potrebenikov, Yury; Protopopescu, Dan; Raggi, Mauro; Reyes, Marco A.; Rodriguez Rivera, Kevin Alexander; Romagnoni, M.; Romano, Angela; Rosa, Ilaria; Rubin, Philip; Ruggiero, Giuseppe; Ryjov, Vladimir; Sadovskiy, Alexander; Salamon, Andrea; Sanders, Jack; Santoni, Cristiano; Saracino, Giulio; Sargeni, Fausto; Schuchmann, Simone; Semenov, Vitali; Sergi, Antonino; Shaikhiev, Artur; Shkarovskiy, Sergey; Soldani, Mattia; Soldi, Dario; Sozzi, Marco; Spadaro, Tommaso; Spinella, Franco; Sturgess, Andrew; Sugonyaev, Valentin; Swallow, Joel; Sytov, A.; Tinti, Gemma; Tomczak, Adam; Trilov, Stoyan; Turisini, Matteo; Valente, Paolo; Velghe, Bob; Venditti, S.; Vicini, Piero; Volpe, Roberta; Vormstein, Mario; Wahl, Heinrich; Wanke, Rainer; Wong, Vincent Wai Sum; Wrona, Bozydar; Yushchenko, Oleg; Zamkovsky, Michal; Zinchenko, Alexander |
| Source: |
Phys.Lett.B, 850(2024), 138513, (2024-02-07) |
| Publisher Information: |
Elsevier B.V. |
| Publication Year: |
2024 |
| Collection: |
Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository |
| Subject Terms: |
K+: secondary beam; K+: radiative decay; photon: pair production; perturbation theory: higher-order; higher-order: 1; mass spectrum: two-photon; mass spectrum: (2photon); perturbation theory: chiral; coupling: (axion 2gluon); K+: branching ratio: measured; branching ratio: upper limit; K+: rare decay; axion-like particles; axion: radiative decay; CERN Lab; NA62; CERN SPS; kinematics; background; experimental results; K+ --> pi+ 2photon; S010.17; S029AD2; High Energy Physics - Experiment; High Energy Physics - Phenomenology |
| 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 |
| Language: |
English |
| Relation: |
https://arxiv.org/pdf/2311.01837; https://www.openaccessrepository.it/communities/inspire-hep; https://doi.org/10.1016/j.physletb.2024.138513; https://inspirehep.net/literature/2718968 |
| DOI: |
10.1016/j.physletb.2024.138513 |
| Availability: |
https://doi.org/10.1016/j.physletb.2024.138513; https://inspirehep.net/literature/2718968 |
| Rights: |
info:eu-repo/semantics/openAccess ; Creative Commons Attribution 4.0 International ; https://creativecommons.org/licenses/by/4.0/ |
| Accession Number: |
edsbas.B88D29A2 |
| Database: |
BASE |