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Ashraf, MU, Cortina Gil, E, Minucci, E, Padolski, S, Petrov, P, Shaikhiev, A, Volpe, R, Numao, T, Petrov, Y, Velghe, B et al (show 231 more authors) , Wong, VWS, Bryman, D, Fu, J, Hives, Z, Husek, T, Jerhot, J, Kampf, K, Kolesar, M, Zamkovsky, M, De Martino, B, Perrin-Terrin, M, Döbrich, B, Lezki, S, Schubert, J, Akmete, AT, Aliberti, R, Khoriauli, G, Kunze, J, Lomidze, D, Peruzzo, L, Vormstein, M, Wanke, R, Dalpiaz, P, Fiorini, M, Neri, I, Norton, A, Petrucci, F, Soldani, M, Wahl, H, Bandiera, L, Cotta Ramusino, A, Gianoli, A, Romagnoni, M, Sytov, A, Iacopini, E, Latino, G, Lenti, M, Lo Chiatto, P, Panichi, I, Parenti, A, Bizzeti, A, Bucci, F, Antonelli, A, Georgiev, G, Kozhuharov, V, Lanfranchi, G, Martellotti, S, Moulson, M, Spadaro, T, Tinti, G, Ambrosino, F, Capussela, T, Corvino, M, D'Errico, M, Di Filippo, D, Fiorenza, R, Francesconi, M, Giordano, R, Massarotti, P, Mirra, M, Napolitano, M, Rosa, I, Saracino, G, Anzivino, G, Brizioli, F, Imbergamo, E, Lollini, R, Piandani, R, Santoni, C, Barbanera, M, Cenci, P, Checcucci, B, Lubrano, P, Lupi, M, Pepe, M, Piccini, M, Costantini, F, Di Lella, L, Doble, N, Giorgi, M, Giudici, S, Lamanna, G, Lari, E, Pedreschi, E, Sozzi, M, Cerri, C, Fantechi, R, Pontisso, L, Spinella, F, Mannelli, I, D'Agostini, G, Raggi, M, Biagioni, A, Cretaro, P, Frezza, O, Leonardi, E, Lonardo, A, Turisini, M, Valente, P, Vicini, P, Ammendola, R, Bonaiuto, V, Fucci, A, Salamon, A, Sargeni, F, Arcidiacono, R, Bloch-Devaux, B, Boretto, M, Menichetti, E, Migliore, E, Soldi, D, Biino, C, Filippi, A, Marchetto, F, Briano Olvera, A, Engelfried, J, Estrada-Tristan, N, Reyes Santos, MA, Rodriguez Rivera, KA, Boboc, P, Bragadireanu, AM, Ghinescu, SA, Hutanu, OE, Bician, L, Blazek, T, Cerny, V, Kucerova, Z, Velas, T, Bernhard, J, Ceccucci, A, Ceoletta, M, Danielsson, H, De Simone, N, Duval, F, Federici, L, Gamberini, E, Gatignon, L, Guida, R, Hahn, F, Holzer, EB, Jenninger, B, Koval, M, Laycock, P, Lehmann Miotto, G, Lichard, P, Mapelli, A, Massri, K, Noy, M, Palladino, V, Pinzino, J, Ryjov, V, Schuchmann, S, Venditti, S, Chang, X, Kleimenova, A, Marchevski, R, Bache, T, Brunetti, MB, Duk, V, Fascianelli, V, Fry, JR, Gonnella, F, Goudzovski, E, Henshaw, J, Iacobuzio, L, Kenworthy, C, Lazzeroni, C, Lurkin, N, Newson, F, Parkinson, C, Romano, A, Sanders, J, Sergi, A, Sturgess, A, Swallow, J, Tomczak, A, Heath, H, Page, R, Trilov, S, Angelucci, B, Britton, D, Graham, C, Protopopescu, D, Carmignani, J
ORCID: 0000-0002-1705-1061, Dainton, JB, Jones, RWL, Ruggiero, G, Fulton, L, Hutchcroft, D
ORCID: 0000-0002-4174-6509, Maurice, E, Wrona, B, Conovaloff, A, Cooper, P, Coward, D, Rubin, P, Baeva, A, Baigarashev, D, Bautin, V, Emelyanov, D, Enik, T, Falaleev, V, Fedotov, S, Gorshanov, K, Gushchin, E, Kekelidze, V, Kereibay, D, Kholodenko, S, Khotyantsev, A, Korotkova, A, Kudenko, Y, Kurochka, V, Kurshetsov, V, Litov, L, Madigozhin, D, Medvedeva, M, Mefodev, A, Misheva, M, Molokanova, N, Movchan, S, Obraztsov, V, Okhotnikov, A, Ostankov, A, Polenkevich, I, Potrebenikov, Yu, Sadovskiy, A, Salamatin, K, Semenov, V, Shkarovskiy, S, Sugonyaev, V, Yushchenko, O and Zinchenko, A
(2024)
First search for K+ → π0πμe decays.
Physics Letters B, 859.
p. 139122.
ISSN 0370-2693
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Abstract
The first search for the lepton number violating decay K+→π0π−μ+e+ and lepton flavour violating decays K+→π0π+μ−e+, K+→π0π+μ+e− has been performed using a dataset collected by the NA62 experiment at CERN in 2016–2018. Upper limits of 2.9×10−10, 3.1×10−10 and 5.0×10−10, respectively, are obtained at 90% CL for the branching ratios of the three decays on the assumption of uniform phase-space distributions.