NO LESS: Novel Opportunities for Light Exotic Searches at the SPS
Abstract
A powerful way to test models with feebly interacting particles in the MeV to GeV mass range is through proton beam-dump experiments. In this paper, we compare the current sensitivity of CERN's NA62 experiment running in beam-dump mode with that of a hypothetical experiment using the same detectors in a future CERN ECN3 beam-dump facility. When optimising such an experiment, the geometric setup is particularly relevant for the specific new-physics scenario under study, since different production mechanisms can generate different angular distributions of new particles. We show that even the most minimalistic reconfiguration of the existing NA62 experiment's detectors can already provide a very competitive sensitivity and collect data immediately after the beam is available.
Cite
@article{arxiv.2601.17119,
title = {NO LESS: Novel Opportunities for Light Exotic Searches at the SPS},
author = {Babette Döbrich and Jan Jerhot and Karim Massri and Jonathan L. Schubert and Tommaso Spadaro},
journal= {arXiv preprint arXiv:2601.17119},
year = {2026}
}
Comments
Version accepted for publication in JHEP. 17 pages + appendices, 13 figures