Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2003-12-03
Physics
High Energy Physics
High Energy Physics - Phenomenology
4 pages, 2 figures, essential expansion of text and information content, 16 references added, title changed
Scientific paper
In the framework of the gauge symmetry ${SU(2)}_{\tiny{CMB}}\times {SU(2)}_{\tiny{e}}\times {SU(2)}_{\tiny{\mu}}\times {SU(2)}_{\tiny{\tau}}$ we provide a microscopic argument why a spontaneously broken, local Z$_2$ symmetry surviving the 1$^{\tiny{st}}$ order phase transition to the confining phase of one of the SU(2) factors generates two stable spin-1/2 excitations of vastly different mass. A mixture of Fermi-Dirac and Bose-Einstein distributions with the former favored by a factor two over the latter is obtained by applying inequivalent, local-in-Euclidean-time Z$_2$ transformations to one and the same field configuration contained in the description of the center-vortex condensate.
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