Abstract
SHiP is a new general purpose fixed target facility, whose Technical Proposal has been recently reviewed by the CERN SPS Committee and by the CERN Research Board. The two boards recommended that the experiment proceeds further to a Comprehensive Design phase in the context of the new CERN Working group ”Physics Beyond Colliders”, aiming at presenting a CERN strategy for the European Strategy meeting of 2019. In its initial phase, the 400 GeV proton beam extracted from the SPS will be dumped on a heavy target with the aim of integrating 2 × 1020 pot in 5 years. A dedicated detector, based on a long vacuum tank followed by a spectrometer and particle identification detectors, will allow probing a variety of models with light long-lived exotic particles and masses below O(10) GeV/c2. The main focus will be the physics of the so-called Hidden Portals, i.e. search for Dark Photons, Light scalars and pseudo-scalars, and Heavy Neutrinos. The sensitivity to Heavy Neutrinos will allow for the first time to probe, in the mass range between the kaon and the charm meson mass, a coupling range for which Baryogenesis and active neutrino masses could also be explained. Another dedicated detector will allow the study of neutrino cross-sections and angular distributions. ντ deep inelastic scattering cross sections will be measured with a statistics 1000 times larger than currently available, with the extraction of the F4 and F5 structure functions, never measured so far and allow for new tests of lepton non-universality with sensitivity to BSM physics.
Highlights
Despite the great success of the Standard Model, there are a number of phenomena still unexplained in current particle physics and strong evidence for Beyond the Standard Model (BSM) physics
The origin of neutrino masses and oscillations, the nature of non-baryonic dark matter, the excess of matter over antimatter or the cosmic inflation remain unexplained by the SM
6.6 × 1015, with Np = 2 × 1020 the number of interacting protons, σccthe cross-section of the associated charm production and σpN the hadronic cross-section per nucleon in the target, fDs the fraction of DS mesons produced and Br(Ds → τ ) the branching ratio for their decay into a τ. These neutrinos will be detected by a dedicated neutrino detector, which is based on the OPERA concept [4]. This detector will consist of a magnetized target based on the emulsion cloud chamber (ECC) technique
Summary
Despite the great success of the Standard Model, there are a number of phenomena still unexplained in current particle physics and strong evidence for Beyond the Standard Model (BSM) physics. E.g. at the LHC, search for new particles at the energy frontier, the recently proposed SHiP (Search for Hidden Particles) experiment aims to explore a sector of very weakly interacting, long lived particles at the intensity frontier Such particles in the GeV range are hoped to be produced at a new beam dump facility at CERN made of a high density proton target followed by a hadron stopper and a muon shield. They can explain neutrino masses via the see-saw mechanism and account for the baryon asymmetry of the universe via leptogenesis
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