Narrowe+e−peaks in heavy-ion collisions and a possible new phase of QED

Abstract

Motivated by the otherwise inexplicable $e^{+}{e}^{-}$ peaks observed in heavy-ion collisions at GSI, we postulate the existence of a new phase of QED. The transition to this new phase is induced by the presence of unusual background electromagnetic field environments. Strong-coupling calculations of the spectrum of confined QED are reported, and the masses fit well with the observed peaks.