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

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.

References in corpus (8)

• Radiative Semileptonic Kaon Decays
• Monte Carlo simulation for radiative kaon decays
• T-odd correlation in the $K_{l3\gamma }$-decay
• The integrated low-level trigger and readout system of the CERN NA62 experiment
• $K_{l3\gamma }^{+}$ decays revisited: branching ratios and T-odd momenta correlations
• Aspects of radiative K^+_e3 decays
• T-odd correlations in radiative K_l3^+ decays and chiral perturbation theory
• Measurement of T-odd asymmetry in radiative K+ -> pi0 e+ nu gamma decay using OKA detector