Threshold effects as the origin of some exotic phenomena
Many XYZ states lie near hadron-pair thresholds, prompting their interpretation as hadronic molecules. Alternatively, some non-resonance interpretations were also proposed due to the near-threshold phenomena, such as the threshold cusp or triangle singularity (TS) mechanism. These kinematic effects can produce resonance-like peaks in invariant mass spectra, complicating the identification of exotic states. It is therefore essential to evaluate such possibilities before attributing a peak to a true particle. In this presentation, we will explore the potential connections between threshold effects and various exotic phenomena.
刘晓海 特聘研究员(天津大学)
理工楼1226