EPS-HEP2021 conference

New measurement of radiative decays $K^{+} \to e^{+}\nu\gamma$ and $K^{+} \to \pi^{0}e^{+}\nu\gamma$ at the NA62 experiment

29 Jul 2021, 10:00

15m

Zoom

T08: Flavour Physics and CP Violation

Speaker

Francesco Brizioli (INFN Perugia)

Description

The NA62 experiment at CERN reports new results from studies of radiative kaon decays 𝐾+→𝑒+𝜈𝛾 (𝐾𝑒2𝛾) and 𝐾+→𝜋0𝑒+𝜈𝛾 (𝐾𝑒3𝛾), using a data sample recorded in 2017--2018. The sample comprises O(10k) 𝐾𝑒2𝛾 candidates and O(100k) 𝐾𝑒3𝛾 candidates with sub-percent background contaminations. Preliminary results with the most precise measurement of the 𝐾𝑒2𝛾 and 𝐾𝑒3𝛾 branching ratios, determination of structure-dependent 𝐾𝑒2𝛾 form factors, and T-asymmetry measurement in the 𝐾𝑒3𝛾 decay, are presented.

Presentation materials

EPS-HEP-2021_Brizioli_NA62_Ke3g.pdf