Würzburg 2018 – scientific programme

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T: Fachverband Teilchenphysik

T 4: Suche nach Physik jenseits des Standardmodels

T 4.6: Talk

Monday, March 19, 2018, 17:15–17:30, Philo-HS4

Search for HNL →ρµ decays in SHiP using the Surrounding Background Tagger — •Sandra Gerlach — Humboldt-Universität zu Berlin

The SHiP (Search for Hidden Particles) experiment is a proposed fixed-target experiment at the CERN SPS. It aims to explore the domain of hidden particles at the O(GeV) mass scale, such as heavy neutral leptons (HNLs).

Protons of 400 GeV momentum are dumped on a tungsten-molybdenum target, where HNLs can be produced from heavy-flavour meson decays. The HNLs may decay in a 50 m long vacuum decay vessel enclosed by the Surrounding Background Tagger (SBT), whose purpose is the suppression of background, in particular, from neutrino and muon interactions in the decay vessel walls.

This talk discusses the reconstruction of the decay HNL →ρµ in the SHiP detector and the role of a liquid-scintillator based SBT in not only suppressing of background but also in extending the signal acceptance for this specific decay.