Search for hadronic decays of feebly-interacting particles at NA62

Abstract

The NA62 experiment at CERN has 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, including dark photons, dark scalars, and axion-like particles, may be produced in the absorber and decay in the instrumented volume beginning approximately 80 m downstream of the dump. A search for these particles decaying in flight to hadronic final states is reported, based on an analysis of a sample of $1.4\times 10^{17}$ protons on dump collected in 2021. No evidence of a New Physics signal is observed, excluding new regions of parameter spaces of multiple models.

The exclusion limits obtained during this study are available in the HepData repository https://doi.org/10.17182/hepdata.156981.v1

References in corpus (4)

• Study of the decay K+ => pi+,nu,nubar in the momentum region 140<Ppi<199 MeV/c
• New Limits on Hidden Photons from Past Electron Beam Dumps
• Search for Axionlike and Scalar Particles with the NA64 Experiment
• Observation of the $K^{+}\to {\pi }^{+}\nu \bar{\nu }$ decay and measurement of its branching ratio

Cited by in corpus (3)

• Advancing the phenomenology of GeV-scale axion-like particles
• New Bounds on Heavy QCD Axions from Big Bang Nucleosynthesis
• Sub-GeV dark matter and multi-decay signatures from dark showers at beam-dump experiments