Photinos and primordial nucleosynthesis

Details Photinos and primordial nucleosynthesis Photinos and primordial nucleosynthesis

Feb 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...173....1s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 173, no. 1, Feb. 1987, p. 1-11.

Astronomy and Astrophysics

Astrophysics

9

Cosmology, Elementary Particles, Nuclear Fusion, Particle Mass, Particle Theory, Radioactive Decay, Time Dependence, Universe

Scientific paper

Photinos are among the most interesting particles predicted by supersymmetric theories. If they exist they should influence in many ways the results of the primordial nucleosynthesis i.e. the predicted primordial abundances of D, 3He, 4He (and 7Li). If photinos are stable, cosmological constraints restrict their possible mass to be either very light (Mγ~ < 100 eV) or to be massive (Mγ~ > a few GeV), depending on the slepton and squark masses. In the case where photinos are unstable, they could create high energy photons able to photodisintegrate the light elements. Unstable photinos cannot be used to reconcile a closed Universe with the results of the primordial nucleosynthesis. The only possibility in this case lies in the hypothetical existence of stable photinos with masses ranging from 3 to 8 GeV (or about 100 eV).

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