Dortmund 2021 – scientific programme

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T: Fachverband Teilchenphysik

T 82: Calorimeters II

T 82.6: Talk

Thursday, March 18, 2021, 17:15–17:30, Tg

Simulation of ALP reconstruction for the SHiP experiment — •Phi Chau, Matei Climescu, and Rainer Wanke — Johannes Gutenberg-Universität, Institut für Physik, Mainz, Germany

So-called Axion-Like Particles (ALPs) are Dark Matter candidates. Various experimental approaches are foreseen to search for evidence of its existence. At the SHiP experiment the SPS 400 GeV proton beam could produce ALPs by interaction with a target material and subsequent decays of the produced particles. These ALPs would be boosted in longitudinal direction and may decay into two photons. The photon pair would be detected by the sampling calorimeter of the experiment, which consists of 50 layers of active material, each separated via lead absorber layers. High precision layers (2-3x) are supposed to support the track reconstruction and improve the angular resolution of photon showers while the other layers, consisting of scintillators with SiPM readout, measure the deposited energy. In this contribution results of simulation studies for determination of the calorimeter design's suitability for ALPs detection and its efficiency are presented. The focus of these studies is put on an ALP mass range of 0.1-1.5 GeV. Also, the performance of the detector in terms of photon energy resolution is determined.