Astrophysical constraints on the couplings of axions, majorons, and familons

Details Astrophysical constraints on the couplings of axions, majorons, and familons Astrophysical constraints on the couplings of axions, majorons, and familons

Jan 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986phrvl..56...26d&link_type=abstract

Physical Review Letters (ISSN 0031-9007), vol. 56, Jan. 6, 1986, p. 26-29.

Physics

152

Bosons, Broken Symmetry, Elementary Particle Interactions, Particle Theory, Stellar Evolution, Electrons, Helium, Photons, Red Giant Stars, Stellar Cores, Thermonuclear Reactions

Scientific paper

The spontaneous breaking of a global symmetry leads to the existence of Nambu-Goldstone bosons, which through their coupling to electrons and/or photons, can transport energy from the cores of stars and affect significantly the course of stellar evolution. By following in detail the evolution of stars, it is found that if the coupling to electrons and/or photons is too strong, helium never ignites - in contradiction with the observational evidence. These limits restrict the axion mass to less than 0.01 eV, the familon breaking scale to less than 7 x 10 to the 9th GeV, and the triplet majoron vacuum expectation value to less than 9 keV.

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