Almost-Goldstone Bosons from Extra-Dimensional Gauge Theories

Details Almost-Goldstone Bosons from Extra-Dimensional Gauge Theories Almost-Goldstone Bosons from Extra-Dimensional Gauge Theories

1995-11-04

arxiv.org/abs/hep-ph/9511238v2

Phys.Rev.Lett. 76 (1996) 1015-1018

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, compressed and uuencoded RevTex file and single postscript figure, fig.eps. Revised version includes a minor correct

Scientific paper

10.1103/PhysRevLett.76.1015

A mechanism is presented through which very light scalar degrees of freedom obeying the nonlinear sigma model equation can emerge in spontaneously broken gauge theories. The mechanism operates in extra dimensional theories in which a) there are massless gauge fields present in the theory prior to compactification, and b) the extra dimensions are inhomogeneous in such a way that symmetry breaking Higgs fields aquire vevs only at very localised points on the manifold. These conditions are naturally fulfilled in orbifold compactifications of string theory. Possible applications include cosmic texture, axions and family symmetry.

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