A study of the K+→ π0e+νγ decay

A bstract A sample of 1 . 3 × 10 5 K + → π 0 e + 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 resul...

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Veröffentlicht in:	The journal of high energy physics 2023-09, Vol.2023 (9), p.40, Article 40
Hauptverfasser:	Cortina Gil, E., Minucci, E., Petrov, P., Shaikhiev, A., Volpe, R., Numao, T., Petrov, Y., Bryman, D., Hives, Z., Husek, T., De Martino, B., Aliberti, R., Kunze, J., Lomidze, D., Vormstein, M., Wanke, R., Fiorini, M., Petrucci, F., Bandiera, L., Latino, G., Georgiev, G., Kozhuharov, V., Moulson, M., Capussela, T., Fiorenza, R., Massarotti, P., Mirra, M., Napolitano, M., Imbergamo, E., Lollini, R., Piandani, R., Santoni, C., Cenci, P., Piccini, M., Costantini, F., Di Lella, L., Giorgi, M., Lamanna, G., Lari, E., Pedreschi, E., D’Agostini, G., Biagioni, A., Leonardi, E., Bonaiuto, V., Arcidiacono, R., Boretto, M., Migliore, E., Soldi, D., Briano Olvera, A., Estrada-Tristan, N., Reyes Santos, M. A., Boboc, P., Bragadireanu, A. M., Blazek, T., Ceoletta, M., Danielsson, H., Döbrich, B., Holzer, E. B., Laycock, P., Lichard, P., Mapelli, A., Noy, M., Ryjov, V., Bache, T., Brunetti, M. B., Duk, V., Fascianelli, V., Gonnella, F., Goudzovski, E., Iacobuzio, L., Lazzeroni, C., Lurkin, N., Romano, A., Sanders, J., Sturgess, A., Swallow, J., Tomczak, A., Heath, H., Page, R., Britton, D., Jones, R. W. L., Wrona, B., Cooper, P., Enik, T., Kholodenko, S., Khotyantsev, A., Korotkova, A., Kudenko, Y., Kurshetsov, V., Mefodev, A., Misheva, M., Movchan, S., Okhotnikov, A., Ostankov, A., Potrebenikov, Yu, Sadovskiy, A., Semenov, V., Shkarovskiy, S., Sugonyaev, V., Yushchenko, O.
Format:	Artikel
Sprache:	eng
Schlagworte:	Asymmetry Atoms & subatomic particles Charged particles Classical and Quantum Gravitation Collaboration Elementary Particles Experiments High energy physics Kinematics Physics Physics and Astronomy Quantum Field Theories Quantum Field Theory Quantum Physics Regular Article - Experimental Physics Relativity Theory Sensors String Theory Synchrotrons
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Zusammenfassung:	A bstract A sample of 1 . 3 × 10 5 K + → π 0 e + 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.
ISSN:	1029-8479 1029-8479
DOI:	10.1007/JHEP09(2023)040