dc.contributor.author |
Sivaram, C |
|
dc.contributor.author |
Krishan, V |
|
dc.date.accessioned |
2004-12-01T07:00:39Z |
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dc.date.available |
2004-12-01T07:00:39Z |
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dc.date.issued |
1982-09 |
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dc.identifier.citation |
Nature, Vol. 299, No. 5882, pp. 427 |
en |
dc.identifier.uri |
http://hdl.handle.net/2248/78 |
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dc.description |
Restricted Access |
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dc.description.abstract |
The recent detection1,2 of an antiproton/proton (/p) ratio at energies much less than 1 GeV is several orders of magnitude above that predicted for production from primary cosmic ray collisions. It is well recognized that there is no mechanism to explain this sub-GeV (130−320 MeV) excess although many suggestions have been made. For example, Eichler3 considers secondary production in high-energy collisions while Kiraly4 et al. suggest black hole evaporation as a source. Most of these suggestions have inherent difficulties such as the imposition of severe constraints on the sources to suppress excessive bold italic gamma-ray production. We postulate here that the phenomenon of neutron− antineutron (nbold n macr) oscillations as a signature of grand unified theories may operate in neutron-rich astrophysical sources such as supernovae to produce the required low-energy galactic antiproton background. |
en |
dc.format.extent |
362993 bytes |
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dc.format.mimetype |
application/pdf |
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dc.language.iso |
en |
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dc.publisher |
Nature Publishing Group |
en |
dc.relation.uri |
http://www.nature.com/nature/journal/v299/n5882/abs/299427a0.html |
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dc.subject |
Neutron Oscillation |
en |
dc.subject |
Cosmic Ray Collisions |
en |
dc.subject |
Galactic Cosmic Rays |
en |
dc.title |
Neutron oscillation as a source of excess sub-GeV antiprotons in galactic cosmic rays |
en |
dc.type |
Article |
en |