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Résumé |
In this talk (based on arxiv:2211.13253), I will consider light-dark sectors (DS)
interacting with the Standard Model (SM) through irrelevant portals motivated by
general principles. I will talk about deriving bounds on such scenarios using the
decay of dark sector excitations inside the neutrino detector, placed downstream
from the target. Our approach in this work is model agnostic and applies to a wide
range of dark sector models. In this approach, the dark sector is characterized by
two energy scales: a UV scale (mass scale of mediators generating the portals) and
an IR scale (mass gap of the dark sector). At intermediate energies, far away from
these scales, the theory is approximately scale-invariant and allows the
calculation of production rates independent of the threshold corrections. We look
at various DS production processes such as meson decays, direct partonic
production, and dark bremsstrahlung. We find that upcoming neutrino experiments
can probe new parameter space regions, inaccessible in current high-energy
experiments, and are comparable to fixed-target/beam-dump experiments. Future
neutrino experiments will probe new parts of parameter space on a fairly shorter
time scale, as compared to other proposed LLP experiments, and provide an
efficient probe of dark sectors. |
