Speaker
Description
A triangular singularity with a loop diagram is the leading Laudau Singularity that features a large number of on-shell particles. We will discuss that BSM models can nicely fit into this paradigm, where hypothetic particles in theories like SUSY and 2HDM are well-positioned to trigger T.S. in a number of processes. At colliders, T.S. will lead to three categories of final-state correlations: anomalous thresholds, two-invariant momenta correlations, and very sharp peaks like those famously seen in hadroscopy studies. We will identify an interesting `all on-shell’ singularity that appears to be missing in the SM Electroweak sector, while it is very easily satisfied in new physics. We also identify a T.S. situation in the t-channel scattering between massive states.
