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
Publication date
January 2021
DOI Publisher
American Physical Society (APS)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
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