CERN Accelerating science

Article
Report number arXiv:2112.01487
Title The SHiP experiment at the proposed CERN SPS Beam Dump Facility
Author(s) SHiP Collaboration  Pokaż wszystkich 345 autorów
Publication 2022-05-26
Imprint 2021-12-02
Number of pages 23
In: Eur. Phys. J. C 82 (2022) 486
DOI 10.1140/epjc/s10052-022-10346-5
Subject category physics.ins-det ; hep-ex ; Detectors and Experimental Techniques ; Particle Physics - Experiment
Accelerator/Facility, Experiment CERN SPS ; SHiP
Abstract The Search for Hidden Particles (SHiP) Collaboration has proposed a general-purpose experimental facility operating in beam-dump mode at the CERN SPS accelerator to search for light, feebly interacting particles. The SHiP experiment incorporates two complementary detectors. The upstream detector is designed for recoil signatures of light dark matter (LDM) scattering and for neutrino physics, in particular with tau neutrinos. It consists of a spectrometer magnet housing a layered detector system with high-density LDM/neutrino target plates, emulsion-film technology and electronic high-precision tracking. The downstream detector system aims at measuring visible decays of feebly interacting particles to both fully reconstructed final states and to partially reconstructed final states with neutrinos, in a nearly background-free environment. The detector consists of a 50\m long decay volume under vacuum followed by a spectrometer and particle identification system with a rectangular acceptance of 5 m in width and 10 m in height. Using the high-intensity beam of 400\gev protons, the experiment aims at profiting from the 4×1019 protons per year that are currently unexploited at the SPS, over a period of 5--10 years. This allows probing dark photons, dark scalars and pseudo-scalars, and heavy neutral leptons with GeV-scale masses at sensitivities that largely exceed those of existing and projected experiments. The sensitivity to light dark matter reaches well below the dark matter relic density limits in the range from a few \mevcc up to 100 MeV-scale masses, and it will be possible to study tau neutrino interactions with unprecedented statistics. This paper describes the SHiP experiment baseline setup and the detector systems, together with performance results from prototypes in test beams, as it was prepared for the 2020 Update of the European Strategy for Particle Physics.
Copyright/License publication: © 2022-2024 The Author(s) (License: CC-BY-4.0), sponsored by SCOAP³
preprint: (License: CC BY 4.0)



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