Astrophysical limits on additional U(1) gauge couplings

Details Astrophysical limits on additional U(1) gauge couplings Astrophysical limits on additional U(1) gauge couplings

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999phdt.........6b&link_type=abstract

Thesis (PhD). WAKE FOREST UNIVERSITY, Source DAI-B 60/06, p. 2760, Dec 1999, 92 pages.

Physics

Leptonic Photons

Scientific paper

In the standard model the difference between muon and tau lepton numbers (Nm-Nt) is conserved. It may be that an unbroken U(1) symmetry and its associated gauge boson g' is coupled to this quantum number. If that were to be the case, there may be observable effects. In particular, a mixing with photons would be an inevitable consequence. Such a mixing would allow us to search for direct evidence of the g' . In the absence of such evidence, we can limit the strength of the coupling. Consequences of the mixing are investigated in the cases of relative. lifetimes of red giant phases in stellar evolution, distortion of the Cosmic Microwave Background radiation, and primordial nucleosynthesis. Improvements are made over existing limits on the coupling.

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