Work

Production of leptonium in heavy quarkonium decays

Year: 2025

Type: article

Abstract: Lepton pairs with opposite charges can form bound states known as “leptonium” through quantum electrodynamic interactions. Heavy quarkonia such as J / ψ are abundantly produced at facilities like BESIII and the future Super Tau-Charm Facility (STCF). In this work, we investigate leptonium production in heavy quarkonium decays, specifically focusing on the processes Q ⟶ ( l 1 + l 2 − ) [ n ] + γ ( l 1 , 2 = τ , μ , e ) and Q ⟶ ( l 1 + l 2 − ) [ n ] + l 1 − l 2 + . Here, Q denotes the heavy quarkonium J / ψ or ϒ , while n = S 1 0 or S 1 3 corresponds to para-leptonium and ortho-leptonium, respectively. With an annual production of 3.4 × 10 12 J / ψ events at STCF, there is significant potential to observe positronium ( e + e − ) , muonium ( μ + e − ) , and dimuonium ( μ + μ − ) . In particular, the ortho-dimuonium ( μ + μ − ) [

Source: Physical review. D/Physical review. D.

DOI: 10.1103/h57h-4ssj

Authors: Yu-Han Zhao, Jun Jiang

Institution: Shandong University

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funder: National Natural Science Foundation of China

Award: G894710286