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Neutron oscillation as a source of excess sub-GeV antiprotons in galactic cosmic rays

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dc.contributor.author Sivaram, C
dc.contributor.author Krishan, V
dc.date.accessioned 2004-12-01T07:00:39Z
dc.date.available 2004-12-01T07:00:39Z
dc.date.issued 1982-09
dc.identifier.citation Nature, Vol. 299, No. 5882, pp. 427 en
dc.identifier.uri http://hdl.handle.net/2248/78
dc.description Restricted Access
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
dc.format.mimetype application/pdf
dc.language.iso en
dc.publisher Nature Publishing Group en
dc.relation.uri http://www.nature.com/nature/journal/v299/n5882/abs/299427a0.html
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

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