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T: Fachverband Teilchenphysik
T 91: Methods in Particle Physics V
T 91.5: Vortrag
Freitag, 20. März 2026, 10:00–10:15, KH 00.020
Background suppression in the SHiP experiment with the Surround Background Tagger and different selection criteria — •Katharina Albrecht for the SHiP-SBT collaboration — Institut für Physik, Humboldt-Universität zu Berlin, Berlin, Germany
SHiP (Search for Hidden Particles) is an experiment that will be in- stalled in a dedicated beam-dump facility in the ECN3 cavern, located in the CERN north area. SHiP will search for feebly interacting par- ticles (FIPs) produced by 400 GeV/c protons from the SPS impinging on a heavy-metal target. Over a 15-year span, the objective is to ac- cumulate 6 × 1020 protons on target with a detector setup that allows suppression of possible background to a negligible level. The experi- ment focuses on optimizing the sensitivity for models featuring long- lived FIPs below 10 GeV/c2 by minimizing backgrounds induced by the huge flux of neutrinos and muons emerging from the beam-dump target. The Surround Background Tagger (SBT) is a critical com- ponent surrounding the 50 m long helium-filled decay volume. The SBT is instrumental to detect charged particles entering the decay volume from the sides as well as inelastic interactions of neutrinos and muons taking place inside the helium-filled decay volume, but also in the SBT itself. The presentation will discuss the suppression of these backgrounds from simulation studies, focusing on different selection criteria between standard and modified cuts.
Keywords: SHiP; Surround Background Tagger; FairShip