On the production of N V and O VI in galactic halos by photons emitted by massive photinos

Details On the production of N V and O VI in galactic halos by photons emitted by massive photinos On the production of N V and O VI in galactic halos by photons emitted by massive photinos

Jan 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983phlb..121..119s&link_type=abstract

Physics Letters B, Volume 121, Issue 2-3, p. 119-120.

Physics

7

Scientific paper

Photinos dominating galactic halos would emit photons energetic enough to produce the recently observed N V and O VI if their rest mass ~250 eV. Such photinos would have the critical density if they are ten times less abundant than neutrinos. This suppression would require a photino decoupling temperature ~200 MeV and so a supersymmetry breaking parameter d~108 GeV2. The theoretical radiative lifetime of the photino then ~1026 s, which is short enough for the halo photon flux to be adequate to produce the observed abundances of N V and O VI as well as the previously discussed Si IV and C IV.

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