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A facility to search for hidden particles at the CERN SPS: the SHiP physics case
Journal article   Open access   Peer reviewed

A facility to search for hidden particles at the CERN SPS: the SHiP physics case

Sergey Alekhin, Wolfgang Altmannshofer, Takehiko Asaka, Brian Batell, Fedor Bezrukov, Kyrylo Bondarenko, Alexey Boyarsky, Ki-Young Choi, Cristóbal Corral, Nathaniel Craig, …
Reports on progress in physics, Vol.79(12), pp.124201-124201
10/24/2016
DOI: 10.1088/0034-4885/79/12/124201
PMID: 27775925
url
https://doi.org/10.1088/0034-4885/79/12/124201View
Published (Version of record) Open Access

Abstract

This paper describes the physics case for a new fixed target facility at CERN SPS. The SHiP (search for hidden particles) experiment is intended to hunt for new physics in the largely unexplored domain of very weakly interacting particles with masses below the Fermi scale, inaccessible to the LHC experiments, and to study tau neutrino physics. The same proton beam setup can be used later to look for decays of tau-leptons with lepton flavour number non-conservation, τ→3μ and to search for weakly-interacting sub-GeV dark matter candidates. We discuss the evidence for physics beyond the standard model and describe interactions between new particles and four different portals-scalars, vectors, fermions or axion-like particles. We discuss motivations for different models, manifesting themselves via these interactions, and how they can be probed with the SHiP experiment and present several case studies. The prospects to search for relatively light SUSY and composite particles at SHiP are also discussed. We demonstrate that the SHiP experiment has a unique potential to discover new physics and can directly probe a number of solutions of beyond the standard model puzzles, such as neutrino masses, baryon asymmetry of the Universe, dark matter, and inflation.
beyond the standard model physics dark photons heavy neutral leptons hidden sectors intensity frontier experiment

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