Intensity and energy frontiers in searches for new physics Sample Clauses

Intensity and energy frontiers in searches for new physics. The development of the Standard Model has come to an end with the confirmation of one of its most important predictions – the discovery of the Xxxxx boson. The quest for new particles has not ended, however. The observed but unexplained phenomena in particle physics and cosmology that we discussed in previous section indicate that other particles exist in the Universe. It is possible that these particles evaded detection so far because they are too heavy to be created at accelerators. Alternatively, some of the hypothetical particles can be sufficiently light (lighter than the Xxxxx or W -boson), but interact very weakly with the Standard Model sector (we will use the term feeble interaction to distinguish this from the weak interactions of the Standard Model). In order to explore this latter possibility, the particle physics community is turning its attention to so-called Intensity Frontier experiments, rather than Energy Frontier experiments like at the LHC or Tevatron (Figure 1.3). Such experiments aim to create high-intensity particle beams and use large detectors to search for the rare interactions of feebly interacting hypothetical particles. Several Intensity Frontiers experiments have been proposed in recent years: DUNE [106], NA62 [107–109], SHiP [110, 111], etc. Known physics Energy Frontier SUSY, extra dim. Composite Xxxxx 🡺 LHC, FHC Interaction strength Intensity Frontier Hidden Sector 🡺 Fixed target facility Energy scale Unknown physics