Speaker
Description
The NA62 experiment at CERN is designed to measure the highly-suppressed decay $K^{+} \to \pi^{+}\nu\bar{\nu}$ and has collected a large sample of $K^+$ decays in flight during Run 1 (2016--2018) and Run 2 (2021--2026). Searches for the decay $K^{+}\rightarrow\pi^{+}X$ using data from 2016--2022, set upper limits on the branching ratio at the $10^{-11}$ level, constraining a broad range of New Physics scenarios, including Dark Photon, Scalars and Axion-Like Particles. The NA62 experiment at CERN has also the capability to collect data in a beam-dump mode, where 400 GeV protons are dumped on an absorber. In this configuration, New Physics particles may be produced in the absorber and decay in an instrumented volume beginning approximately 80 m downstream of the dump. Preliminary results from a search for Heavy-Neutral leptons decaying in flight to semi-leptonic final states are reported, based on an analysis of a sample of $6.2 \times 10^{17}$ protons on dump collected in 2021, 2023, and 2024.
| Primary Abstract Topic | Experiment: Other Dark Matter |
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