Calibration of a multi modular lead glass electromagnetic calorimeter

[摘要] We have studied the response of a lead glass electromagnetic shower detector by using an electron beam of 1 and 2 GeV. We present the results obtained from a study on position resolution of the detector. The stability of the calibration was monitored by using an LED system and an Am-source system. The position resolution varies for clusters with the number of blocks in the cluster. The average resolution is 2cm. The detector was used in a ;;mock;; experiment to reconstruct the $pisp0$ mass by measuring the two photons coming from $pisp0$ decay. We measure a mass of 135.5 $pm$ 12.5 MeV for the $pisp0$. The actual mass of the $pisp0$ from the particle data booklet is 134.96. The width of the $pisp0$ mass, which is a test of the energy resolution of the detector, gives 18%/$surd$E.

[发布机构] Rice University

[效力级别] Elementary particles