E+e- peaks at 1.8 MeV: Phenomenological constraints on nuclear transitions, axions, and the particle interpretation

Lawrence M. Krauss, Michael Zeller

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

We investigate phenomenological constraints on a variety of possible explanations of the e+e- peaks observed by the EPOS Collaboration at GSI. We first review problems with a variety of proposed nuclear-related production mechanisms. Next we investigate constraints on the axion interpretation of the observed events. New non-accelerator-related constraints come from considerations of shifts in the hyperfine splitting in positronium, and an analysis of the decays K'e+e- and 'e+e-e+, which are relevant for a proposed short-lived axion variant. We then demonstrate that present and past beam-dump experiments are, in a model-independent way, sensitive to a new 1.8-MeV particle coupling to electrons. Our estimates suggest that if the particle does not interact in the target one should see very high event rates for all allowed lifetimes from 10-1410-10 sec at high-energy facilities and lifetimes greater than 10-10 sec at low-energy dumps.

Original languageEnglish (US)
Pages (from-to)3385-3393
Number of pages9
JournalPhysical Review D
Volume34
Issue number11
DOIs
StatePublished - Jan 1 1986

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

Fingerprint Dive into the research topics of 'E+e- peaks at 1.8 MeV: Phenomenological constraints on nuclear transitions, axions, and the particle interpretation'. Together they form a unique fingerprint.

Cite this