E+e- pairs from a nuclear transition signaling an elusive light neutral boson

A. Krasznahorkay, F. W.N. De Boer, M. Csatlós, L. Csige, Z. Gácsi, J. Gulyás, M. Hunyadi, T. J. Ketel, J. Van Klinken, A. Krasznahorkay, A. Vitéz

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Electron-positron pairs have been observed in the 10.95-MeV 0- → 0+ decay in 16O. The branching ratio of the e +e- pairs compared to the 3.84-MeV 0- → 2+ γ decay of the level is deduced to be 20(5) × 10 -5. This magnetic monopole (M0) transition cannot proceed by γ-ray decay and is, to first order, forbidden for internal pair creation. However, the transition may also proceed by the emission of a light neutral 0- or 1+ boson. Indeed, we do observe a sharp peak in the e+e- angular correlation with all the characteristics belonging to the intermediate emission of such a boson with an invariant mass of 8.5(5) MeV/c2. It may play a role in the current quest for light dark matter in the universe.

Original languageEnglish
Title of host publicationEXOTIC NUCLEAR SYSTEMS
Subtitle of host publicationInternational Symposium on Exotic Nuclear Systems, ENS'05
Pages236-241
Number of pages6
DOIs
Publication statusPublished - Nov 21 2005
EventInternational Symposium on Exotic Nuclear Systems, ENS'05 - Debrecen, Hungary
Duration: Jun 20 2005Jun 25 2005

Publication series

NameAIP Conference Proceedings
Volume802
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

OtherInternational Symposium on Exotic Nuclear Systems, ENS'05
CountryHungary
CityDebrecen
Period6/20/056/25/05

Keywords

  • Anomal IPC
  • Dark matter
  • Light boson
  • Magnetic monopole transition

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Krasznahorkay, A., De Boer, F. W. N., Csatlós, M., Csige, L., Gácsi, Z., Gulyás, J., Hunyadi, M., Ketel, T. J., Van Klinken, J., Krasznahorkay, A., & Vitéz, A. (2005). E+e- pairs from a nuclear transition signaling an elusive light neutral boson. In EXOTIC NUCLEAR SYSTEMS: International Symposium on Exotic Nuclear Systems, ENS'05 (pp. 236-241). (AIP Conference Proceedings; Vol. 802). https://doi.org/10.1063/1.2140659