2021/09/17 by Qi Huang, Jia-Jun Wu
Mathematics · Physics and Astronomy · #Algorithm #Combinatorics #Computer science #Geometry #High-Energy Particle Collisions Research #Invariant (physics) #Invariant mass #Mathematical analysis #Mathematical physics #Mathematics #Particle physics #Particle physics theoretical and experimental studies #Physics #Pi #Process (computing) #Quantum Chromodynamics and Particle Interactions #Singularity #hep-ph
paper · pdf · doi:10.1103/physrevd.104.116003
published in arXiv (Cornell University) 104(11) (Cornell University)
arxiv created 2021/09/17 · openalex publication_date 2021/09/20 · arxiv updated 2021/12/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
In this work, we propose that there exists a moving triangle singularity in the ψ(2S) → π+ π- K+ K- process, whose position can vary from 1.158 to 1.181 GeV in the invariant mass spectrum of K+K-. After a precise analysis on this process, it turns out that after doing some cuts on mπ+π-, experiments do have the opportunity to observe this triangle singularity. In addition, when changing the cuts on mπ+π-, the movement of the predicted triangle singularity can also be observed. Thus, we suggest future experiments, especially Super Tau-Charm Facility (STCF), to do an anlysis on the ψ(2S) → π+ π- K+ K- process to verify our prediction.