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Title: | Neutron oscillation as a source of excess sub-GeV antiprotons in galactic cosmic rays |
Authors: | Sivaram, C Krishan, V |
Keywords: | Neutron Oscillation Cosmic Ray Collisions Galactic Cosmic Rays |
Issue Date: | Sep-1982 |
Publisher: | Nature Publishing Group |
Citation: | Nature, Vol. 299, No. 5882, pp. 427 |
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. |
Description: | Restricted Access |
URI: | http://hdl.handle.net/2248/78 |
Appears in Collections: | IIAP Publications |
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Neutron oscillation as a source of excess Restricted Access | Restricted Access | 128.85 kB | Adobe PDF | View/Open Request a copy |
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