HNL and LLP at NA62 beam dump

by Jan Jerhot (Max Planck Society (DE))

Monday 22 Apr 2024, 11:00 → 12:00 Europe/Zurich

BSP 626 / Zoom

The NA62 experiment at CERN, designed to measure the highly-suppressed decay  $K^{+} \rightarrow \pi^{+}\nu\bar{\nu}$, has the capability to look for New Physics (NP) particles, including dark photons, scalars, axion-like particles, and heavy neutral leptons. This search can be carried out in two modes of operation: standard kaon mode and a special beam-dump mode, each probing a different range of NP particle masses and couplings to the SM. Numerous searches for NP particles produced in kaon decays using data from 2017-2018 will be shown as well as several analyses of the 2021 beam-dump data sample, including a new preliminary result, where the NP particle produced in the absorber can decay 80 m downstream into hadronic final states.

jjerhot_220424_EPFLseminar.pdf