How to Observe the Vacuum Decay in Low-Energy Heavy-Ion Collisions

I.A. Maltsev, V.M. Shabaev, R.V. Popov, Y.S. Kozhedub, G. Plunien, X. Ma, Thomas Stöhlker, D.A. Tumakov

Research output

5 Citations (Scopus)


In slow collisions of two bare nuclei with the total charge larger than the critical value Zcr≈173, the initially neutral vacuum can spontaneously decay into the charged vacuum and two positrons. The detection of the spontaneous emission of positrons would be direct evidence of this fundamental phenomenon. However, the spontaneously produced particles are indistinguishable from the dynamical background in the positron spectra. We show that the vacuum decay can nevertheless be observed via impact-sensitive measurements of pair-production probabilities. The possibility of such an observation is demonstrated using numerical calculations of pair production in low-energy collisions of heavy nuclei.

Original languageEnglish
Article number113401
Number of pages5
JournalPhysical Review Letters
Issue number11
Publication statusPublished - 12 Sep 2019

Scopus subject areas

  • Physics and Astronomy(all)

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