학술논문

A study of the K+→ π0e+νγ decay
Document Type
Original Paper
Author
Cortina Gil, E.Kleimenova, A.Minucci, E.Padolski, S.Petrov, P.Shaikhiev, A.Volpe, R.Numao, T.Petrov, Y.Velghe, B.Wong, V. W. S.Bryman, D.Fu, J.Hives, Z.Husek, T.Jerhot, J.Kampf, K.Zamkovsky, M.De Martino, B.Perrin-Terrin, M.Akmete, A. T.Aliberti, R.Khoriauli, G.Kunze, J.Lomidze, D.Peruzzo, L.Vormstein, M.Wanke, R.Dalpiaz, P.Fiorini, M.Mazzolari, A.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.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, M. A.Boboc, P.Bragadireanu, A. M.Ghinescu, S. A.Hutanu, O. E.Bician, L.Blazek, T.Cerny, V.Kucerova, Z.Bernhard, J.Ceccucci, A.Ceoletta, M.Danielsson, H.De Simone, N.Duval, F.Döbrich, B.Federici, L.Gamberini, E.Gatignon, L.Guida, R.Hahn, F.Holzer, E. B.Jenninger, B.Koval, M.Laycock, P.Lehmann Miotto, G.Lichard, P.Mapelli, A.Marchevski, R.Massri, K.Noy, M.Palladino, V.Pinzino, J.Ryjov, V.Schuchmann, S.Venditti, S.Bache, T.Brunetti, M. B.Duk, V.Fascianelli, V.Fry, J. R.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.Dainton, J. B.Jones, R. W. L.Ruggiero, G.Fulton, L.Hutchcroft, D.Maurice, E.Wrona, B.Conovaloff, A.Cooper, P.Coward, D.Rubin, P.Baeva, A.Baigarashev, D.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.Semenov, V.Shkarovskiy, S.Sugonyaev, V.Yushchenko, O.Zinchenko, A.
Source
Journal of High Energy Physics. 2023(9)
Subject
Branching fraction
Electroweak Interaction
Fixed Target Experiments
Flavour Physics
Language
English
ISSN
1029-8479
Abstract
Abstract: A sample of 1.3 × 105K+ → π0e+νγ candidates with less than 1% background was collected by the NA62 experiment at the CERN SPS in 2017–2018. Branching fraction measurements are obtained at percent relative precision in three restricted kinematic regions, improving on existing results by a factor larger than two. An asymmetry, possibly related to T-violation, is investigated with no evidence observed within the achieved precision.