XIII International Conference on Kaon Physics -- Kaon 2025 Mainz

Session

Rare Decays

10 Sept 2025, 09:25

Alte Mensa (Johannes Gutenberg University Mainz)

21. Rare kaon decays at LHCb

Dr Luis Miguel Garcia Martin (EPFL - Ecole Polytechnique Federale Lausanne (CH))

10/09/2025, 09:25

Rare Decays

Oral Contribution

Rare decays are fundamental probes for physics beyond the Standard Model, and the expanding LHCb program on strange physics provides unique and complementary information with respect to the beauty and charm sectors. Recent results of rare kaon decays at LHCb will be summarized and prospects for strange physics with LHCb Upgrade I, where the change in trigger strategy will allow for a much...

64. Measurement of the K+ ➞ μ+ ν μ+ μ– decay at NA62

Adam Mateusz Tomczak (University of Birmingham (GB))

10/09/2025, 09:50

Rare Decays

Oral Contribution

The first observation of the $K^+\to\mu^+\nu\mu^+\mu^-$ decay with the 2016-2024 dataset collected by the NA62 experiment is presented. The branching ratio of the process is measured relative to the normalisation channel $K^+\to\pi^+\mu^+\mu^-$, taking advantage of similar final states and both decays being collected by the same trigger stream. The dominant background is the $K^+\to...

44. Precision measurements of kaon and pion decays at NA62

Michal Koval (Charles University (CZ))

12/09/2025, 09:00

Rare Decays

Oral Contribution

The NA62 experiment at CERN reports recent results from precision measurements of kaon and pion decays, using data samples collected in 2017-2018. A sample of $K^+ \rightarrow \pi^+ \gamma \gamma$ decays is collected using a minimum-bias trigger, and the results include measurement of the branching ratio, study of the di-photon mass spectrum, and the first search for production and prompt...