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external electric field 1magnetic field effects 1nonperturbative decay 1proton decay 1Schwinger mechanism 1worldline instantons 1

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1 paper

hep-th2026

Composite worldline instantons and the nonperturbative particle decay in constant external electric and magnetic fields

Alexander Gorsky, Ivan Poluboyarinov

The paper studies how composite worldline instantons describe the nonperturbative decay of charged particles in constant electric and magnetic fields, showing agreement with self‑e…