Abstract
SHiP is an experiment to look for very weakly interacting particles at a new to be constructed beam-dump facility at the CERN SPS. The SHiP Technical Proposal has been submitted to the CERN SPS Committee in April 2015. The 400 GeV/c proton beam extracted from the SPS will be dumped on a heavy target with the aim of integrat- ing 2× 10 20 proton on target in five years. A detector located downstream of the targe t, based on a long vacuum tank followed by a spectrometer and particle identifi cation de- tectors, will allow probing a variety of models with light long-lived exotic partic les and masses below a few GeV/c 2 . The main focus will be the physics of the so-called Hid- den Portals, i.e. search for Dark Photons, Light scalars and pseudo-scalars, and Heavy Neutral Leptons (HNL). The sensitivity to HNL will allow for the first time to pr obe, 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. Integrated in SHiP is an Emulsion Cloud Chamber, already used in the OPERA experiment, which will allow to study active neutrino cross-sections and angular distributions. In par ticular SHiP can distinguish betweeno? and ¯ o?, and their deep inelastic scattering cross sections will be measured with statistics three orders of magnitude larger than currently available.
Highlights
With the discovery of the Higgs boson[1][2] all the constituents of the Standard Model (SM) have been observed
Experimental observations like neutrino oscillations, the existence of dark matter (DM) and the baryon asymmetry of the Universe (BAU) prove that the SM is an incomplete description of nature
While this necessitates the extension of the theory, neither experiment nor theory provide guidance on the mass scale of physics beyond the SM (BSM), nor on the coupling strength of any new particles to the SM particles
Summary
With the discovery of the Higgs boson[1][2] all the constituents of the Standard Model (SM) have been observed. Experimental observations like neutrino oscillations, the existence of dark matter (DM) and the baryon asymmetry of the Universe (BAU) prove that the SM is an incomplete description of nature While this necessitates the extension of the theory, neither experiment nor theory provide guidance on the mass scale of physics beyond the SM (BSM), nor on the coupling strength of any new particles to the SM particles. Models with no new physics between the Fermi and Planck scales try to extend the SM using the smallest possible set of fields and renormalizable interactions For example this ”Minimality principle” motivates νMSM[5][6] which attempts to explain the pattern of neutrino masses, DM and the observed BAU by introducing three, new, right-handed Majorana Heavy Neutral Leptons (HNL).
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