Reconstruction and simulation of the performance of the Electromagnetic Calorimeter on MPD

• Published in: Journal of instrumentation Vol. 15; no. 6; p. C06027
• Main Authors: Huang, Y., Dabrowska, B., Zinchenko, A., Tyapkin, I.A., Wang, Y.
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.06.2020
• Subjects: Atomic collisions; Atomic properties; Heavy ions; Ionic collisions; Particle collisions; Photons; Protons; Restoration; Spatial resolution
• ISSN: 1748-0221; 1748-0221
• DOI: 10.1088/1748-0221/15/06/C06027

The main goal of MPD at NICA is to investigate the hot and dense baryonic matter in heavy-ion collisions over a wide range of atomic masses, from Au+Au collisions at a center-of-mass energy of sNN=11 GeV (for Au79+) to proton-proton collisions with spp=20 GeV. A shashlyk type Electromagnetic Calorimeter is an important detector of the MPD to identify electrons and photons, and measure their energy with high precision. The performance of the ECal in detecting photons and reconstruct π0 were simulated and analyzed. π0 signal can be reconstructed from two photons and it is a very important probe to study the chiral symmetry restoration and flow signal. The time capability of the ECal was also explored for particle identification. The performance of ECal can be got in the simulartion, energy and spatial resolution are about 6% and 4.8 mm for 1-GeV photons. Reconstructing efficiency for photon and π0 can reach to 80% and 50%. π can be separated from K for P<1.9 GeV/c and K can be separated from π and proton for P<1.1 GeV/c with an efficiency higher than 90%.