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Report No.

The Performance evaluation of lead glass calorimeter for the J-PARC E16 experiment, 2

Ashikaga, Sakiko; Naruki, Megumi*; Hasegawa, Shoichi  

The spontaneous chiral symmetry breaking in QCD vacuum is thought to be an origin of hadron mass. The chiral symmetry is considered to be restored in hot/dense matter. The J-PARC E16 experiment aim to study the mechanism by measuring the mass spectrum of $$phi$$ meson in nuclear medium. In our experiment, $$phi$$ mesons are produced on nuclear target with the high momentum proton beam at the high-p beam line, which is under construction at the J-PARC Hadron Facility. We will measure electron pairs from the $$phi$$ meson decay by using the E16 spectrometer. Lead glass calorimeter is a key device for identification of the electron pairs. We did a test experiment with hadron beam in spring 2017. In this presentation, the result of the test experiment and the performance evaluation of lead glass calorimeter will be explained.



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