Cosmic production of quarkonium?

Details Cosmic production of quarkonium? Cosmic production of quarkonium?

May 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986phrvl..56.2128r&link_type=abstract

Physical Review Letters (ISSN 0031-9007), vol. 56, May 19, 1986, p. 2128-2131. Research supported by the Exxon Education Foundat

Physics

36

Annihilation Reactions, Cosmic Rays, Fermions, Galaxies, Halos, Spectrometers, Superconductors

Scientific paper

It has been suggested that pair annihilation of heavy Majorana fermions in the galactic halo into quarkonium plus a monochromatic photon could occur at an observable rate. It is shown that a calculation of Srednicki, Theisen, and Silk (1986) seriously overestimates the rate for this process, by an order of magnitude or more, as a result of neglecting the bound-state structure of quarkonium. It may nevertheless still be possible to resolve the correspondingly smaller gamma-ray line flux over the diffuse cosmic background by use of the currently planned space-borne superconducting-magnetic spectrometer facility with an energy resolution of 1 pct or better.

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