Gauge Fields and Fermions in Tachyon Effective Field Theories

Details Gauge Fields and Fermions in Tachyon Effective Field Theories Gauge Fields and Fermions in Tachyon Effective Field Theories

2000-11-24

arxiv.org/abs/hep-th/0011226v1

JHEP 0102 (2001) 034

Physics

High Energy Physics

High Energy Physics - Theory

32 pages, LaTeX

Scientific paper

10.1088/1126-6708/2001/02/034

In this paper we incorporate gauge fields into the tachyon field theory models for unstable D-branes in bosonic and in Type II string theories. The chosen couplings yield massless gauge fields and an infinite set of equally spaced massive gauge fields on codimension one branes. A lack of a continuum spectrum is taken as evidence that the stable tachyon vacuum does not support conventional gauge excitations. For the bosonic string model we find two possible solvable couplings, one closely related to Born-Infeld forms and the other allowing a detailed comparison to the open string modes on bosonic D-branes. We also show how to include fermions in the type II model. They localize correctly on stable codimension one branes resulting in bose-fermi degeneracy at the massless level. Finally, we establish the solvability of a large class of models that include kinetic terms with more than two derivatives.

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