Heidelberg 2015 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 14: Instrumentation 6

HK 14.3: Talk

Monday, March 23, 2015, 17:45–18:00, M/HS4

Neutral particle identification with the BGO crystal calorimeter of the BGO-OD experiment — •Georg Scheluchin for the BGO-OD collaboration — Physikalisches Institut, Nussallee 12, D-53115 Bonn

The aim of the BGO-OD experiment is the systematic investigation of nonstrange and strange meson photoproduction. The setup combines a large aperture forward magnetic spectrometer and a central BGO crystal calorimeter with almost 4 π acceptance. The BGO calorimeter consists of 480 scintillator crystals with individual SADC readouts. An additional inner barrel of scintillator strips allows charged particle identification.

Accurate identification of neutral mesons is made by the characterization of electromagnetic showers from decay photons. Multiple particle hits in the BGO calorimeter can lead to overlapping showers, reducing the efficiency in particle identification and accuracy in momentum reconstruction.

An improved algorithm to disentangle overlapping showers with the BGO calorimeter will be presented. The algorithm is tested with both simulated and experimental data.

Supported by DFG (SFB/TR-16).