Abstract
SHiP (Search for Hidden Particles) is a new general purpose fixed target facility suggested for SPS accelerator at CERN. The experiment is currently in Comprehensive Design Report preparation phase, aiming to become a part of European Strategy for Particle Physics update in 2019. In the initial phase of SHiP, the 400 GeV proton beam extracted from the SPS will be dumped on a heavy target producing 2 × 1020 protons on target 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 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 be explained simultaneously. Another dedicated detector will allow the study of tau-neutrino physics.
Highlights
Current situation in particle physics is characterized by undisputable triumph of the Standard Model (SM)
No new heavy particles have been discovered by ATLAS and CMS experiments for 9 years of Large Hadron Collider (LHC) running
Indirect searches of New Physics (NP) by LHCb and other precision experiments provided very high, hundreds-TeV bounds for heavy NP degrees of freedom in some channels
Summary
Current situation in particle physics is characterized by undisputable triumph of the Standard Model (SM). The crucial assumption for this prediction to be credible is the absence of new (heavy) degrees of freedom which are nonsinglets with respect to the SM interactions In other words, this is a strong indication to no New Physics up to the Planck scale. This apparent paradox is perhaps a hint that it is more useful to think not about New Physics (NP) that could solve theoretical problems of the SM, but about NP that could explain observed effects beyond the SM (in hope that theory will settle things anyway) Taking this point of view we can come to the conclusion that such NP would not necessary be new heavy degrees of freedom, we are looking for at LHC experiments on energy frontier. A project of experimental facility capable to do the job is described below
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