Würzburg 2018 – scientific programme

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T: Fachverband Teilchenphysik

T 4: Suche nach Physik jenseits des Standardmodels

T 4.7: Talk

Monday, March 19, 2018, 17:30–17:45, Philo-HS4

Estimation of muon DIS (Deep Inelasctic scattering) background for the SHiP Experiment — •Plamenna Venkova for the SHiP LScin SBT collaboration — Humboldt University, Berlin, Germany

SHiP is a general-purpose fixed-target facility, proposed to be constructed at the CERN SPS accelerator complex. Dumping 2 ×10²⁰ protons with momentum of 400 GeV on a molybdenum-tungsten target over a time of five years allows probing a wide variety of models containing light long-lived exotic particles with masses below O(10) GeV such as Heavy Neutral Leptons (HNLs).

After stopping hadrons and filtering out muons, the HNLs can decay in the decay vessel, which is enclosed by a surrounding background tagger (SBT). The decay products of the HNLs are detected in a subsequent spectrometer.

One of the main background to the hidden particle decay signals originates from deep inelastic scattering of muons in the vicinity of the decay vessel producing V⁰ particles. Their decay modes can mimic the topology of the signal events.

In this talk, an estimation of this background is presented and the role of the SBT to suppress the background in the offline analysis is discussed.