Development of high-precision calorimeters for the SHiP experiment at CERN SPS

• Matei Climescu (University of Mainz)

SHiP (Search for Hidden Particles) is an approved experiment to be located in the North Area at CERN which will utilize unprecedented proton fluxes in a beam dump configuration to probe the intensity frontier to search for new physics. SHiP will be equipped with two calorimeter systems. The SHiP Scattering Neutrino Detector will leverage its high granularity calorimetric layers to perform energy reconstruction and particle identification in neutrino events, particularly the O(10⁴) expected tau neutrino events, as well as light dark matter searches. The second calorimeter is based on the novel SplitCal concept and will be part of the Hidden Sector Decay Spectrometer. It will enable downstream particle identification and reconstruction of neutral final states using high-precision detector layers. Together with segmentation of the calorimeter, high precision layers will allow to achieve excellent angular resolution, translating to high reconstruction efficiency and mass resolution in the search for feebly interacting beyond the Standard Model particles, such as axion-like-particles, heavy neutral leptons and sgoldstinos. The High granularity layers would involve scintillator tiles readout with optical fibres and SiPMs derived from the SoLid experiment whereas the GEM detectors would be utilised as High Precision Layers. These proposed detectors will allow the SHiP experiment to extend its sensitivity to beyond the standard model physics.