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Humboldt-Universität zu Berlin - Mathematisch-Naturwissen­schaft­liche Fakultät - Experimentelle Elementarteilchenphysik



The Search for Hidden Particles(=SHiP) experiment proposal at a dedicated proton beam-dump facility at the CERN SPS aims to search for feebly interacting particles (such as right-handed Majorana neutrinos, axion-like particles, dark photons, dark scalars) in the mass range ot a few 100 MeV up to a few GeV. Such particles are predicted in many extensions of the standard model to address open puzzles in elementary particle physics such as existence and smallness of neutrino masses, matter-antimatter asymmetry of the universe, and dark matter. The principle of the experiment is as follows: 400 GeV protons are dumped in a long heavy-metal target. Hadrons are absorbed in an absorber and the produced charged muons are either stopped or deflected by a magnetized muon shield. Feebly interacting particles such as right-handed Majorana neutrinos that are produced in the proton-nuclei collisions are expected to have long lifetimes and can decay in a subsequent 50 m long decay volume. They are reconstructed in a subsequent detector.

Research Topics

  • Surround Background Tagger

    To identify potential background events induced by muons and neutrinos, the decays volume is surrounded by surround background tagger, (SBT which is the detector we are working on. In the current design of the experiment, this detector is based on liquid scintillator with Wavelength-shifting Optical Modules (WOMs) coupled to SiPMs as photondetectors. We are working on the WOMs and SiPMs of this detector and study the capability to reduce the rejection of background induced by neutrinos and muons through the SBT detector.

Group members

  • Postdoctoral research fellows


PhD students

Andrew Conaboy

Anupama Reghunath

  • Master students

    Jakob Schmidt

  • Alexander Vagts



List of these written within the SHiP group


List of publicaitons of the SHiP group