Despite its wide-ranging success, the Standard Model leaves some of the universe’s deepest mysteries unanswered. What is dark matter? Why does matter dominate over antimatter? Given how no beyond-the-Standard-Model phenomena have yet been observed at the Large Hadron Collider (LHC), a question naturally arises: are physicists searching in the right place?
Figure 1: The expected and observed 95% confidence-limit on the branching fraction of the Higgs boson to a pair of scalar long-lived particles (s) as a function of the proper decay length (𝑐𝜏). The limit obtained in this analysis is shown in green, while the limit of the two displaced vertex search is displayed in red. The combined limit is shown in blue. (Image: ATLAS Collaboration/CERN)
