K+ → π+vv: First results from the NA62 experiment at CERN

Aliberti, R; Ambrosino, F; Ammendola, R; Angelucci, B; Antonelli, A; Anzivino, G; Arcidiacono, R; Barbanera, M; 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; Capussela, T; 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; De Simone, 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; Husek, T; Hutanu, O; Hutchcroft, D; Iacobuzio, L; Iacopini, E; Imbergamo, E; Jenninger, B; 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; Lanfranchi, G; Lamanna, G; 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; 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; Parkinson, C; Pedreschi, E; Pepe, M; Perrin-Terrin, M; Peruzzo, L; Petrov, P; 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; Semenov, V; Sergi, A; Shaikhiev, A; Shkarovskiy, S; Soldi, D; Sougonyaev, 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; A. Zinchenko.,

The decay K+ → π+vv, with a very precisely predicted branching ratio ofless than 10-10, is one of the best candidates to reveal indirect effects of newphysics at the highest mass scales. The NA62 experiment at CERN SPS isdesigned to measure the branching ratio of the K+ → π+vv with a decay-inflight technique, novel for this channel. NA62 took data in 2016, 2017 and 2018.Statistics collected in 2016 allows NA62 to reach the Standard Model sensitivityfor K+ → π+vv, entering the domain of 10-10 single event sensitivity andshowing the proof of principle of the experiment. The preliminary result onK+ → π+vv from the analysis of the 2016 data set is described.

Aliberti, R., Ambrosino, F., Ammendola, R., Angelucci, B., Antonelli, A., Anzivino, G., et al. (2018). K+ → π+vv: First results from the NA62 experiment at CERN. In 17th Vulcano Workshop: Frontier Objects in Astrophysics and Particle Physics 2018 (pp.345-360). Istituto Nazionale di Fisica Nucleare.