2017/10/31 by Neil D. Barrie, Archil Kobakhidze, Shelley Liang +2
Physics and Astronomy · #Bound state #Charge (physics) #Dark Matter and Cosmic Phenomena #Electron #Large Hadron Collider #Lepton #Nuclear physics #Particle Detector Development and Performance #Particle physics #Particle physics theoretical and experimental studies #Photon #Physics #hep-ph
paper · pdf · doi:10.1016/j.physletb.2018.03.087
9 pages, 3 figures, Updated to match PLB
openalex publication_date 2018/04/05 · arxiv created 2018/04/20 · arxiv updated 2018/04/23 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Heavy long-lived multi-charged leptons (MCLs) are predicted by various new physics models. These hypothetical MCLs can form bound states, due to their high electric charges and long life times. In this work, we propose a novel strategy of searching for MCLs through their bound state productions and decays. By utilising LHC-8 TeV data in searching for resonances in the diphoton channel, we exclude the masses of isospin singlet heavy leptons with electric charge |q|≥6 (in units of electron charge) lower than ∼1.2 TeV, which are much stronger than the corresponding 8 TeV LHC bounds from analysing the high ionisation and the long time-of-flight of MCLs. By utilising the current 13 TeV LHC diphoton channel measurements the bound can further exclude MCL masses up to ∼1.6 TeV for |q|≥6. Also, we demonstrate that the conventional LHC limits from searching for MCLs produced via Drell–Yan processes can be enhanced by including the contribution of photon fusion processes.