: Searches for the lepton number violating K^{+}→π^{-}μ^{+}e^{+} decay and the lepton flavor violating K^{+}→π^{+}μ^{-}e^{+} and π^{0}→μ^{-}e^{+} decays are reported using data collected by the NA62 experiment at CERN in 2017-2018. No evidence for these decays is found and upper limits of the branching ratios are obtained at 90% confidence level: B(K^{+}→π^{-}μ^{+}e^{+})<4.2×10^{-11}, B(K^{+}→π^{+}μ^{-}e^{+})<6.6×10^{-11} and B(π^{0}→μ^{-}e^{+})<3.2×10^{-10}. These results improve by 1 order of magnitude over previous results for these decay modes.

Search for Lepton Number and Flavor Violation in K^{+} and π^{0} Decays / Aliberti, R; Ambrosino, F; Ammendola, R; Angelucci, B; Antonelli, A; Anzivino, G; Arcidiacono, R; Bache, T; Baeva, A; Baigarashev, D; Barbanera, M; Bernhard, J; Biagioni, A; Bician, L; Biino, C; Bizzeti, A; Blazek, T; Bloch-Devaux, B; Bonaiuto, V; Boretto, M; Bragadireanu, A M; Britton, D; Brizioli, F; Brunetti, M B; Bryman, D; Bucci, F; Capussela, T; Carmignani, J; Ceccucci, A; Cenci, P; Cerny, V; Cerri, C; Checcucci, B; Conovaloff, A; Cooper, P; Cortina Gil, E; Corvino, M; Costantini, F; Cotta Ramusino, A; Coward, D; D'Agostini, G; Dainton, J B; Dalpiaz, P; Danielsson, H; De Simone, N; Di Filippo, D; Di Lella, L; Doble, N; Duk, V; Duval, F; Döbrich, B; Emelyanov, D; Engelfried, J; Enik, T; Estrada-Tristan, N; Falaleev, V; Fantechi, R; Fascianelli, V; Federici, L; Fedotov, S; Filippi, A; Fiorini, M; Fry, J R; Fu, J; Fucci, A; Fulton, L; Gamberini, E; Gatignon, L; Georgiev, G; Ghinescu, S A; Gianoli, A; Giorgi, M; Giudici, S; Gonnella, F; Goudzovski, E; Graham, C; Guida, R; Gushchin, E; Hahn, F; Heath, H; Henshaw, J; Holzer, E B; Husek, T; Hutanu, O E; Hutchcroft, D; Iacobuzio, L; Iacopini, E; Imbergamo, E; Jenninger, B; Jerhot, J; Jones, R W L; Kampf, K; Kekelidze, V; Kholodenko, S; Khoriauli, G; Khotyantsev, A; Kleimenova, A; Korotkova, A; Koval, M; Kozhuharov, V; Kucerova, Z; Kudenko, Y; Kunze, J; Kurochka, V; Kurshetsov, V; Lamanna, G; Lanfranchi, G; Lari, E; Latino, G; Laycock, P; Lazzeroni, C; Lehmann Miotto, G; Lenti, M; Leonardi, E; Lichard, P; Litov, L; Lollini, R; Lomidze, D; Lonardo, A; Lubrano, P; Lupi, M; Lurkin, N; Madigozhin, D; Mannelli, I; Mapelli, A; Marchetto, F; Marchevski, R; Martellotti, S; Massarotti, P; Massri, K; Maurice, E; Medvedeva, M; Mefodev, A; Menichetti, E; Migliore, E; Minucci, E; Mirra, M; Misheva, M; Molokanova, N; Moulson, M; Movchan, S; Napolitano, M; Neri, I; Newson, F; Norton, A; Noy, M; Numao, T; Obraztsov, V; Ostankov, A; Padolski, S; Page, R; Palladino, V; Parenti, A; Parkinson, C; Pedreschi, E; Pepe, M; Perrin-Terrin, M; Peruzzo, L; Petrov, P; Petrov, Y; Petrucci, F; Piandani, R; Piccini, M; Pinzino, J; Polenkevich, I; Pontisso, L; Potrebenikov, Yu; Protopopescu, D; Raggi, M; Romano, A; Rubin, P; Ruggiero, G; Ryjov, V; Salamon, A; Santoni, C; Saracino, G; Sargeni, F; Schuchmann, S; Semenov, V; Sergi, A; Shaikhiev, A; Shkarovskiy, S; Soldi, D; Sozzi, M; Spadaro, T; Spinella, F; Sturgess, A; Sugonyaev, V; Swallow, J; Trilov, S; Valente, P; Velghe, B; Venditti, S; Vicini, P; Volpe, R; Vormstein, M; Wahl, H; Wanke, R; Wrona, B; Yushchenko, O; Zamkovsky, M; Zinchenko, A. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 127:13(2021), p. 131802. [10.1103/PhysRevLett.127.131802]

Search for Lepton Number and Flavor Violation in K^{+} and π^{0} Decays

Ambrosino, F;Brunetti, M B;Capussela, T;Corvino, M;Di Filippo, D;Massarotti, P;Napolitano, M;Saracino, G;
2021

Abstract

: Searches for the lepton number violating K^{+}→π^{-}μ^{+}e^{+} decay and the lepton flavor violating K^{+}→π^{+}μ^{-}e^{+} and π^{0}→μ^{-}e^{+} decays are reported using data collected by the NA62 experiment at CERN in 2017-2018. No evidence for these decays is found and upper limits of the branching ratios are obtained at 90% confidence level: B(K^{+}→π^{-}μ^{+}e^{+})<4.2×10^{-11}, B(K^{+}→π^{+}μ^{-}e^{+})<6.6×10^{-11} and B(π^{0}→μ^{-}e^{+})<3.2×10^{-10}. These results improve by 1 order of magnitude over previous results for these decay modes.
2021
Search for Lepton Number and Flavor Violation in K^{+} and π^{0} Decays / Aliberti, R; Ambrosino, F; Ammendola, R; Angelucci, B; Antonelli, A; Anzivino, G; Arcidiacono, R; Bache, T; Baeva, A; Baigarashev, D; Barbanera, M; Bernhard, J; Biagioni, A; Bician, L; Biino, C; Bizzeti, A; Blazek, T; Bloch-Devaux, B; Bonaiuto, V; Boretto, M; Bragadireanu, A M; Britton, D; Brizioli, F; Brunetti, M B; Bryman, D; Bucci, F; Capussela, T; Carmignani, J; Ceccucci, A; Cenci, P; Cerny, V; Cerri, C; Checcucci, B; Conovaloff, A; Cooper, P; Cortina Gil, E; Corvino, M; Costantini, F; Cotta Ramusino, A; Coward, D; D'Agostini, G; Dainton, J B; Dalpiaz, P; Danielsson, H; De Simone, N; Di Filippo, D; Di Lella, L; Doble, N; Duk, V; Duval, F; Döbrich, B; Emelyanov, D; Engelfried, J; Enik, T; Estrada-Tristan, N; Falaleev, V; Fantechi, R; Fascianelli, V; Federici, L; Fedotov, S; Filippi, A; Fiorini, M; Fry, J R; Fu, J; Fucci, A; Fulton, L; Gamberini, E; Gatignon, L; Georgiev, G; Ghinescu, S A; Gianoli, A; Giorgi, M; Giudici, S; Gonnella, F; Goudzovski, E; Graham, C; Guida, R; Gushchin, E; Hahn, F; Heath, H; Henshaw, J; Holzer, E B; Husek, T; Hutanu, O E; Hutchcroft, D; Iacobuzio, L; Iacopini, E; Imbergamo, E; Jenninger, B; Jerhot, J; Jones, R W L; Kampf, K; Kekelidze, V; Kholodenko, S; Khoriauli, G; Khotyantsev, A; Kleimenova, A; Korotkova, A; Koval, M; Kozhuharov, V; Kucerova, Z; Kudenko, Y; Kunze, J; Kurochka, V; Kurshetsov, V; Lamanna, G; Lanfranchi, G; Lari, E; Latino, G; Laycock, P; Lazzeroni, C; Lehmann Miotto, G; Lenti, M; Leonardi, E; Lichard, P; Litov, L; Lollini, R; Lomidze, D; Lonardo, A; Lubrano, P; Lupi, M; Lurkin, N; Madigozhin, D; Mannelli, I; Mapelli, A; Marchetto, F; Marchevski, R; Martellotti, S; Massarotti, P; Massri, K; Maurice, E; Medvedeva, M; Mefodev, A; Menichetti, E; Migliore, E; Minucci, E; Mirra, M; Misheva, M; Molokanova, N; Moulson, M; Movchan, S; Napolitano, M; Neri, I; Newson, F; Norton, A; Noy, M; Numao, T; Obraztsov, V; Ostankov, A; Padolski, S; Page, R; Palladino, V; Parenti, A; Parkinson, C; Pedreschi, E; Pepe, M; Perrin-Terrin, M; Peruzzo, L; Petrov, P; Petrov, Y; Petrucci, F; Piandani, R; Piccini, M; Pinzino, J; Polenkevich, I; Pontisso, L; Potrebenikov, Yu; Protopopescu, D; Raggi, M; Romano, A; Rubin, P; Ruggiero, G; Ryjov, V; Salamon, A; Santoni, C; Saracino, G; Sargeni, F; Schuchmann, S; Semenov, V; Sergi, A; Shaikhiev, A; Shkarovskiy, S; Soldi, D; Sozzi, M; Spadaro, T; Spinella, F; Sturgess, A; Sugonyaev, V; Swallow, J; Trilov, S; Valente, P; Velghe, B; Venditti, S; Vicini, P; Volpe, R; Vormstein, M; Wahl, H; Wanke, R; Wrona, B; Yushchenko, O; Zamkovsky, M; Zinchenko, A. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 127:13(2021), p. 131802. [10.1103/PhysRevLett.127.131802]
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/908113
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? 5
social impact