Heidelberg 2015 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 38: Hadron Structure and Spectroscopy 8
HK 38.3: Vortrag
Dienstag, 24. März 2015, 18:00–18:15, T/SR25
Measuring the branching fraction of ω → η γ with the Crystal Ball Experiment at MAMI — •Oliver Steffen and Wolfgang Gradl for the A2 collaboration — Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz
The Crystal Ball Collaboration uses energy tagged bremstrahlung photons produced from the MAMI electron beam to study photo-induced reactions on nucleons and nuclei. The Crystal Ball/TAPS 4π calorimeter setup is optimized for the detection of neutral final states. Charged particles are identified and measured by the inner detector system.
A large data set of photoproduced η′ and ω mesons has been obtained during recent data taking periods with the End Point Tagger (Eγ= 1.4 to 1.6 GeV) and the liquid hydrogen target.
We plan to use this data to measure the branching fraction of the ω → η γ decay. Simulation studies for this decay have already started.
In this talk we will present the current status of the ongoing work and discuss the next steps of the analysis.