Fundamental Constants and Their Possible Time Dependence

Details Fundamental Constants and Their Possible Time Dependence Fundamental Constants and Their Possible Time Dependence

Jun 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005fqbh.conf..210f&link_type=abstract

FROM QUARKS TO BLACK HOLES: PROGRESS IN UNDERSTANDING THE LOGIC OF NATURE. Proceedings of the International School of Subnuclear

Physics

Nuclear Physics

Scientific paper

Astrophysical indications that the fine-structure constant has undergone a small time variation during the cosmological evolution are considered within the framework of the standard model of the electroweak and strong interactions and of grand unification. A variation of the electromagnetic coupling constant could either be generated by a corresponding time variation of the unified coupling constant or by a time variation of the unification scale. The various possibilities, differing greatly in their implications for the variation of low energy physics parameters like the nuclear mass scale, are discussed. The case in which the variation is caused by a time variation of the unification scale is of special interest.

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