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Searches for lepton flavour and lepton number violation in K+ decays

Authors :
Aliberti, R
Ambrosino, F
Ammendola, R
Angelucci, B
Antonelli, A
Anzivino, G
Arcidiacono, R
Bache, T
Barbanera, M
Bernhard, J
Biagioni, A
Bician, L
Biino, C
Bizzeti, A
Blazek, T
Bloch-Devaux, B
Bonaiuto, V
Boretto, M
Bragadireanu, M
Britton, D
Brizioli, F
Brunetti, Mb
Bryman, D
Bucci, F
Ca-pussela, 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
Dalpiaz, P
Danielsson, H
Desimone, N
Di Filippo, D
Di Lella, L
Doble, N
Dobrich, B
Duval, F
Duk, V
Engelfried, J
Enik, T
Estrada-Tristan, N
Falaleev, V
Fantechi, R
Fascianelli, V
Federici, L
Fedotov, S
Filippi, A
Fiorini, M
Fry, J
Fu, J
Fucci, A
Fulton, L
Gamberini, E
Gatignon, L
Georgiev, G
Ghinescu, S
Gianoli, A
Giorgi, M
Giudici, S
Gonnella, F
Goudzovski, E
Graham, C
Guida, R
Gushchin, E
Hahn, F
Heath, H
Holzer, Eb
Husek, T
Hutanu, O
Hutchcroft, D
Iacobuzio, L
Iacopini, E
Imbergamo, E
Jenninger, B
Jerhot, J
Jones, Rw
Kampf, K
Kekelidze, V
Kholodenko, S
Khori-auli, G
Khotyantsev, A
Kleimenova, A
Korotkova, A
Koval, M
Kozhuharov, V
Kucerova, Z
Kudenko, Y
Kunze, J
Kurochka, V
Kurshetsov, V
Lanfranchi, G
Lamanna, G
Lari, E
Latino, G
Laycock, P
Lazzeroni, C
Lenti, M
Lehmann Miotto, G
Leonardi, E
Lichard, P
Litov, L
Lollini, R
Lomidze, D
Lonardo, A
Lubrano, P
Lupi, M
Lurkin, N
Madigozhin, D
Mannelli, I
Mannocchi, G
Mapelli, A
Marchetto, F
Marchevski, R
Martellotti, S
Mas-sarotti, P
Massri, K
Maurice, E
Medvedeva, M
Mefodev, A
Menichetti, E
Migliore, E
Minucci, E
Mirra, M
Mi-sheva, 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, Y
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
Sugonyaev, V
Sozzi, M
Spadaro, T
Spinella, F
Sturgess, A
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 Year :
2020

Abstract

The NA62 experiment at CERN offers the highest experimental sensitivity to rare and forbidden kaon decays. A search for lepton number violating processes K+→π-e+e- and K+→π-μ+μ+, using a partial data set collected by NA62 in 2016-2018, is reported. No signals are observed and upper limits at 90% confidence level on the branching fractions of these decays are obtained: 2.2x10-10 and 4.2x10-11, respectively. These results improve on previously reported measurements by factors of 3 and 2, respectively.

Subjects

Subjects :
Settore FIS/04
Particle Physics - Experiment

Details

Language :
English
Database :
OpenAIRE
Accession number :
edsair.doi.dedup.....a4cd1941d32681a32849717672a4f7d5

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