leptonium

English

Etymology

Blend of lepton +‎ onium

Noun

leptonium (plural leptoniums)

1. (physics) A bound pair of a lepton and its antiparticle
   • 2016, Neil D. Barrie, Archil Kobakhidze, Shelley Liang, Matthew Talia, Lei Wu, “Heavy Leptonium as the Origin of the 750 GeV Diphoton Excess”, in arXiv‎^[1]:

     The LHC constraints on exotic stable massive charged particles seem to further shrink the allowed range for the hypercharge down to $Y_{\ell }\approx 8-8.9$, with the caveat that the relation between the leptonium mass and the mass of the constituent leptons in our calculations is plagued with a large theoretical uncertainty for large $Y_{\ell }$.