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Article | |
Report number | arXiv:2311.01837 ; CERN-EP-2023-247 |
Title | Measurement of the $K^+ \to \pi^+ \gamma \gamma$ decay |
Related title | Measurement of the K+ → π+γγ decay |
Author(s) |
Cortina Gil, Eduardo (Louvain U., CP3) ; Minucci, Elisa (Louvain U., CP3 ; Syracuse U.) ; Padolski, Sergey (Louvain U., CP3) ; Petrov, Plamen (Louvain U., CP3) ; Velghe, Bob (TRIUMF) ; Bryman, Douglas (British Columbia U. ; TRIUMF) ; Fu, Ji (British Columbia U.) ; Numao, Toshio (TRIUMF) ; Petrov, Yevgeniy (TRIUMF) ; Wong, Vincent Wai Sum (TRIUMF) ; Husek, Tomas (Charles U. ; Birmingham U.) ; Kampf, Karol (Charles U.) ; Zamkovsky, Michal (Charles U. ; CERN) ; Jerhot, Jan (Charles U. ; Munich, Max Planck Inst.) ; Aliberti, Riccardo (Mainz U., Inst. Phys. ; Helmholtz Inst., Mainz) ; Khoriauli, Gia (Mainz U., Inst. Phys. ; Wurzburg U.) ; Kunze, Jonas (Mainz U., Inst. Phys.) ; Lomidze, David (Mainz U., Inst. Phys. ; European XFEL, Hamburg) ; Marchevski, Radoslav (CERN ; EPFL) ; Peruzzo, Letizia (Mainz U., Inst. Phys.) ; Vormstein, Mario (Mainz U., Inst. Phys.) ; Wanke, Rainer (Mainz U., Inst. Phys.) ; Cotta Ramusino, Angelo (INFN, Ferrara) ; Dalpiaz, Pietro (Ferrara U.) ; Fiorini, Massimiliano (Ferrara U.) ; Gamberini, Enrico (CERN) ; Gianoli, Alberto (INFN, Ferrara) ; Neri, Ilaria (Ferrara U.) ; Norton, Alan (Ferrara U. ; Glasgow U.) ; Petrucci, Ferruccio (Ferrara U.) ; Wahl, Heinrich (Ferrara U. ; Mainz U., Inst. Phys.) ; Bizzeti, Andrea (INFN, Florence ; Modena U.) ; Bucci, Francesca (INFN, Florence) ; Iacopini, Enrico (Florence U.) ; Latino, Giuseppe (Florence U.) ; Lenti, Massimo (Florence U.) ; Parenti, Andrea (Florence U.) ; Volpe, Roberta (Louvain U., CP3 ; INFN, Perugia) ; Antonelli, Antonella (Frascati) ; Gonnella, Francesco (Birmingham U.) ; Lamanna, Gianluca (Pisa U.) ; Lanfranchi, Gaia (Frascati) ; Tinti, Gemma (Frascati) ; Martellotti, Silvia (Frascati) ; Moulson, Matthew (Frascati) ; Kozhuharov, Venelin (Frascati ; Sofiya U.) ; Litov, Leandar (Sofiya U.) ; Georgiev, Georgi (Frascati ; Sofiya U.) ; Raggi, Mauro (Rome U.) ; Spadaro, Tommaso (Frascati) ; Ambrosino, Fabio (Naples U.) ; Fiorenza, Renato (Naples U. ; SSM, Naples) ; Capussela, Tiziana (Naples U.) ; Corvino, Michele (Naples U.) ; Di Filippo, Domenico (Naples U.) ; Massarotti, Paolo (Naples U.) ; Mirra, Marco (Naples U.) ; Napolitano, Marco (Naples U.) ; Saracino, Giulio (Naples U.) ; Anzivino, Giuseppina (Perugia U.) ; Imbergamo, Ermanno (Perugia U.) ; Lollini, Riccardo (Perugia U.) ; Santoni, Cristiano (Perugia U.) ; Brizioli, Francesco (Perugia U. ; CERN) ; Barbanera, Mattia (INFN, Perugia) ; Cenci, Patrizia (INFN, Perugia) ; Checcucci, Bruno (INFN, Perugia) ; Duk, Viacheslav (Birmingham U. ; INFN, Perugia) ; Lupi, Matteo (INFN, Perugia ; Goethe U., Frankfurt, Inst. Inform.) ; Pepe, Monica (INFN, Perugia) ; Piccini, Mauro (INFN, Perugia) ; Lubrano, Pasquale (INFN, Perugia) ; Costantini, Flavio (Pisa U.) ; Doble, Niels (Pisa U. ; Mainz U., Inst. Phys.) ; Giorgi, Marcello (Pisa U.) ; Giudici, Sergio (Pisa U.) ; Lari, Enrico (Pisa U.) ; Pinzino, Jacopo (CERN ; INFN, Pisa) ; Pontisso, Luca (INFN, Pisa ; INFN, Rome) ; Sozzi, Marco (Pisa U.) ; Di Lella, Luigi (Pisa U. ; Mainz U., Inst. Phys.) ; Mannelli, Italo (Pisa, Scuola Normale Superiore) ; Cerri, Claudio (INFN, Pisa) ; Fantechi, Riccardo (INFN, Pisa) ; Pedreschi, Elena (Pisa U.) ; Piandani, Roberto (Perugia U. ; San Luis Potosi U.) ; Spinella, Franco (INFN, Pisa) ; Biagioni, Andrea (INFN, Rome) ; D'Agostini, Giulio (Rome U.) ; Leonardi, Emanuele (INFN, Rome) ; Lonardo, Alessandro (INFN, Rome) ; Valente, Paolo (INFN, Rome) ; Vicini, Piero (INFN, Rome) ; Cretaro, Paolo (INFN, Rome) ; Turisini, Matteo (INFN, Rome) ; Frezza, Ottorino (INFN, Rome) ; Ammendola, Roberto (Rome U., Tor Vergata) ; Bonaiuto, Vincenzo (Rome U., Tor Vergata) ; De Simone, Nicola (CERN ; DESY) ; Federici, Luca (CERN) ; Fucci, Adolfo (Rome U., Tor Vergata) ; Salamon, Andrea (Rome U., Tor Vergata) ; Sargeni, Fausto (Rome U., Tor Vergata) ; Arcidiacono, Roberta (Turin U. ; Piemonte Orientale U., Novara) ; Biino, Cristina (INFN, Turin) ; Bloch-Devaux, Brigitte (Turin U.) ; Boretto, Marco (Turin U. ; CERN) ; Filippi, Alessandra (INFN, Turin) ; Iacobuzio, Lorenza (Birmingham U.) ; Marchetto, Flavio (INFN, Turin) ; Menichetti, Ezio (Turin U.) ; Migliore, Ernesto (Turin U.) ; Soldi, Dario (Turin U.) ; Engelfried, Jürgen (San Luis Potosi U.) ; Estrada-Tristan, Nora (San Luis Potosi U. ; Guanajuato U.) ; Bragadireanu, Alexandru Mario (Bucharest, IFIN-HH) ; Ghinescu, Stefan Alexandru (Bucharest, IFIN-HH) ; Hutanu, Ovidiu Emanuel (Bucharest, IFIN-HH) ; Enik, Temur ; Falaleev, Valeri (INFN, Perugia) ; Kekelidze, Vladimir ; Korotkova, Anna ; Madigozhin, Dmitry ; Misheva, Milena (Sofiya, Inst. Nucl. Res.) ; Molokanova, Natalia ; Movchan, Sergei ; Polenkevich, Irina ; Potrebenikov, Yuri ; Shkarovskiy, Sergey ; Zinchenko, Andrey ; Baeva, Aigul ; Baigarashev, Dosbol (Eurasian Nat. U., Astana) ; Emelyanov, Dmitry ; Fedotov, Sergei ; Khotyantsev, Alexey ; Gushchin, Evgeny ; Kleimenova, Alina (Louvain U., CP3 ; EPFL) ; Kudenko, Yury ; Kurochka, Viktoriia ; Medvedeva, Mariia ; Mefodev, Aleksandr ; Shaikhiev, Artur (Louvain U., CP3 ; Lancaster U.) ; Kholodenko, Sergey (INFN, Pisa) ; Kurshetsov, Viktor ; Obraztsov, Vladimir ; Ostankov, Aleksandr ; Semenov, Vitali ; Sugonyaev, Valentin ; Yushchenko, Oleg ; Bician, Lubos (Comenius U. ; Charles U.) ; Blazek, Tomas (Comenius U.) ; Cerny, Vladimir (Comenius U.) ; Koval, Michal (CERN ; Charles U.) ; Kucerova, Zuzana (Comenius U. ; CERN) ; Ceccucci, Augusto (CERN) ; Bernhard, Johannes (CERN) ; Danielsson, Hans (CERN) ; Döbrich, Babette (Munich, Max Planck Inst.) ; Duval, Francois (CERN) ; Gatignon, Lau (CERN ; Lancaster U.) ; Guida, Roberto (CERN) ; Hahn, Ferdinand (CERN) ; Holzer, Eva Barbara (CERN) ; Jenninger, Berthold (CERN) ; Laycock, Paul (CERN ; Brookhaven) ; Lehmann Miotto, Giovanna (CERN) ; Lichard, Peter (CERN) ; Mapelli, Alessandro (CERN) ; Noy, Matthew (CERN) ; Palladino, Vito (CERN) ; Perrin-Terrin, Mathieu (Marseille, CPPM) ; Ruggiero, Giuseppe (Lancaster U. ; Florence U.) ; Ryjov, Vladimir (CERN) ; Schuchmann, Simone (CERN) ; Venditti, Stefano (CERN) ; Brunetti, Maria Brigida (Birmingham U. ; Warwick U., UK) ; Bache, Thomas (Birmingham U.) ; Goudzovski, Evgueni (Birmingham U.) ; Henshaw, Jack (Birmingham U.) ; Tomczak, Adam (Birmingham U.) ; Lazzeroni, Cristina (Birmingham U.) ; Fascianelli, Valeria (Birmingham U. ; Columbia U. (main)) ; Lurkin, Nicolas (Birmingham U. ; Louvain U., CP3) ; Newson, Francis (Birmingham U.) ; Parkinson, Christopher (Birmingham U.) ; Romano, Angela (Birmingham U.) ; Sergi, Antonino (Birmingham U. ; Genoa U.) ; Sturgess, Andrew (Birmingham U.) ; Swallow, Joel (Birmingham U. ; CERN) ; Heath, Helen (Bristol U.) ; Page, Ryan (Bristol U.) ; Trilov, Stoyan (Bristol U.) ; Angelucci, Bruno (Glasgow U.) ; Britton, David (Glasgow U.) ; Protopopescu, Dan (Glasgow U.) ; Graham, Connor (Glasgow U.) ; Jones, Roger William Lewis (Lancaster U.) ; Dainton, John Bourke (Lancaster U.) ; Fry, John Richard (Birmingham U.) ; Fulton, Liam (Liverpool U.) ; Hutchcroft, David (Liverpool U.) ; Carmignani, Joseph (Lancaster U. ; Liverpool U.) ; Massri, Karim (CERN) ; Maurice, Emilie (Liverpool U. ; LLR, Palaiseau) ; Wrona, Bozydar (Liverpool U.) ; Conovaloff, Adam (George Mason U.) ; Cooper, Peter (George Mason U.) ; Coward, David (George Mason U. ; SLAC) ; Rubin, Philip David (George Mason U.) ; Hives, Zdenko (Charles U.) ; Akmete, Atakan Tugberk (Mainz U., Inst. Phys.) ; Soldani, Mattia (Ferrara U.) ; Bandiera, Laura (INFN, Ferrara) ; Mazzolari, Andrea (Ferrara U.) ; Romagnoni, Marco (INFN, Ferrara) ; Sytov, Alexei (INFN, Ferrara) ; Panichi, Ilaria (Florence U.) ; Lo Chiatto, Prisco (Florence U.) ; D'Errico, Mariaelena (Naples U.) ; Giordano, Raffaele (Naples U.) ; Briano Olvera, Alejandro (San Luis Potosi U.) ; Reyes Santos, Marco Antonio (San Luis Potosi U. ; Guanajuato U.) ; Boboc, Petre (Bucharest, IFIN-HH) ; Kereibay, Dias ; Gorshanov, Konstantin ; Okhotnikov, Artem ; Sadovskiy, Alexander ; Sanders, Jack (Birmingham U.) ; Kenworthy, Chandler (Birmingham U.) ; De Martino, Bianca (Marseille, CPPM) ; Rosa, Ilaria (Naples U.) ; Ceoletta, Marco (CERN) ; Rodriguez Rivera, Kevin Alexander (San Luis Potosi U.) ; Lezki, Samet (Munich, Max Planck Inst.) |
Corporate author(s) | The NA62 collaboration |
Publication | 2024-02-07 |
Imprint | 01 Nov 2023 |
Number of pages | 11 |
Published in: | Phys. Lett. B 850 (2024) 138513 |
DOI | 10.1016/j.physletb.2024.138513 |
Subject category | Particle Physics - Experiment ; Particle Physics - Phenomenology |
Accelerator/Facility, Experiment | CERN SPS ; NA62 |
Keywords | flavor physics ; QCD ; exotics ; branching fraction ; experimental results ; rare decay ; Chiral Perturbation Theory ; hidden sector mediator |
Abstract | A sample of 3984 candidates of the $K^+ \to \pi^+ \gamma \gamma$ decay, with an estimated background of $291 \pm 14$ 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 ($9.61 \pm 0.17) \times 10^{−7}$. The first search for production and prompt decay of an axion-like particle with gluon coupling in the process $K^+ \to \pi^+ a, a \to \gamma \gamma$ is also reported. |
Other source | Inspire |
Copyright/License | Preprint: © 2023-2024 CERN (License: CC-BY-4.0) Publication: © 2024 The Author (License: CC BY 4.0) |
Submitted by | [email protected] |