Dortmund 2021 – scientific programme

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T: Fachverband Teilchenphysik

T 82: Calorimeters II

T 82.9: Talk

Thursday, March 18, 2021, 18:00–18:15, Tg

First studies of pulse-shape analysis in pure CsI at Belle II. — •Munira Khan for the Belle II collaboration — DESY BELLE II

The Belle II electromagnetic calorimeter is the first high energy physics detector to implement pulse shape discrimination in CsI(Tl) crystals, as new method to improve particle identification. Different particles produce a different scintillation response in the crystals. By analysing these pulse shapes, electromagnetically and hadronically interacting particles can be distinguished. This technique has been demonstrated in the first data from the Belle II experiment and included in the particle identification.

Pure CsI has a faster scintillation time, is more resistant against radiation damage from high beam backgrounds, and is therefore an interesting calorimeter material for future high intensity colliders or a potential upgrade of Belle II. This talk will report on a test-bench setup for pure CsI crystals at DESY and simulation studies with GEANT. The goal of this project is to perform investigation into a pulse-shape analysis with this scintillator material and compare it to the well-characterised CsI(Tl).