A study of the $K^+ \to \pi^0 e^+ \nu \gamma$ decay

Cortina Gil, Eduardo;Minucci, Elisa;Padolski, Siarhei;Rumenov Petrov, Plamen;NA62;et.al.
(2023) Journal of High Energy Physics — Vol. 09 (2023)

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Authors
  • Cortina Gil, Eduardoorcid-logoUCLouvain
    Author
  • Minucci, ElisaUCLouvain
    Author
  • Padolski, SiarheiUCLouvain
    Author
  • Rumenov Petrov, PlamenUCLouvain
    Author
  • Jerhot, JanUCLouvain
    Author
  • Volpe, RobertaUCLouvain
    Author
  • Kleimenova, AlinaUCLouvain
    Author
  • Shaikhiev, ArturUCLouvain
    Author
  • Perrin-Terrin, MathieuUCLouvain
    Author
  • Lurkin, NicolasUCLouvain
    Author
  • NA62
    Author
  • et. al.
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Abstract
A sample of $1.3 \times 10^5$$K^+ \to \pi^0 e^+ \nu \gamma$ 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.
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Cortina Gil, E., Minucci, E., Padolski, S., Rumenov Petrov, P., Jerhot, J., Volpe, R., Kleimenova, A., Shaikhiev, A., Perrin-Terrin, M., Lurkin, N., NA62, & et al. (2023). A study of the $K^+ \to \pi^0 e^+ \nu \gamma$ decay. Journal of High Energy Physics, 09. https://doi.org/10.1007/JHEP09(2023)040 (Original work published 2023)