A sample of 1.3 × 105 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.

A study of the K + → π 0 e + νγ decay / 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., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2023:9(2023), pp. 0-0. [10.1007/JHEP09(2023)040]

A study of the K + → π 0 e + νγ decay

Lo Chiatto P.;Bizzeti A.;Angelucci B.;
2023

Abstract

A sample of 1.3 × 105 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.
2023
Inglese
2023
9
040
0
0
Branching fraction; Electroweak Interaction; Fixed Target Experiments; Flavour Physics
open
info:eu-repo/semantics/article
Contributo su RIVISTA::Articolo su rivista
262
A study of the K + → π 0 e + νγ decay / 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., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2023:9(2023), pp. 0-0. [10.1007/JHEP09(2023)040]
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.; B...espandi
232
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1354169
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