Induced decay of composite JPC=1++ particles in atomic Coulomb fields

The electron-positron pairs observed in heavy-ion collisions at Gesellschaft für Schwerionen-forschung Darmstadt mbH have been interpreted as the decay products of yet unknown particles with masses around 1.8 MeV. The ne
The electron-positron pairs observed in heavy-ion collisions at Gesellschaft für Schwerionen-forschung Darmstadt mbH have been interpreted as the decay products of yet unknown particles with masses around 1.8 MeV. The negative results of resonant Bhabha scattering experiments, however, do not support such an interpretation. Therefore we focus on a more complex decay scenario, where the e+e- lines result from a two-collision process. We discuss the induced decay of a metastable 1++ state into e+e- pairs. For most realizations of a 1++ state such a decay in leading order can only take place in the Coulomb field of a target atom. This fact has the attractive consequence that for such a state the Bhabha bounds are no longer valid. However, the absolute value of the e+e- production cross section turns out to be unacceptably small.
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Metadaten
Author:E. Stein, J. Reinhardt, Andreas Schäfer, Walter Greiner
URN:urn:nbn:de:hebis:30-29934
Document Type:Article
Language:English
Date of Publication (online):2006/07/12
Year of first Publication:1994
Publishing Institution:Univ.-Bibliothek Frankfurt am Main
Release Date:2006/07/12
Source:Phys. Rev. A 50, 867~V870 (1994), ©1994 The American Physical Society, http://link.aps.org/abstract/PRA/v50/p867
HeBIS PPN:189837926
Institutes:Physik
Dewey Decimal Classification:530 Physik
PACS-Classification:12.20.Ds Specific calculations
34.90.+q Other topics in atomic and molecular collision processes and interactions (restricted to new topics in section 34)
Sammlungen:Universitätspublikationen
Licence (German):License Logo Veröffentlichungsvertrag für Publikationen

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