Field Theoretic Branes and Tachyons of the QCD String

Abstract

Dvali and Shifman have proposed a field-theoretic mechanism for localizing gauge fields to "branes" in higher dimensional spaces using confinement in a bulk gauge theory. The resulting objects have a number of qualitative features in common with string theory D-branes; they support a gauge field and flux strings can end on them. In this letter, we explore this analogy further, by considering what happens when N of these "branes" approach each other. Unlike in the case of D-branes, we find a reduction of the gauge symmetry as the "branes" overlap. This can be attributed to a tachyonic instability of the flux string stretching between the branes.

13 pages, 5 figures, references added

References in corpus (4)

• The Hierarchy Problem and New Dimensions at a Millimeter
• New Dimensions at a Millimeter to a Fermi and Superstrings at a TeV
• Branes And The Dynamics Of QCD
• The Standard Model from extra dimensions

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• Monopoles, Vortices, Domain Walls and D-Branes: The Rules of Interaction
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• Crystal Manyfold Universes in AdS Space
• Gravity-induced instability and gauge field localization
• Effective gauge theories on domain walls via bulk confinement?
• SU(5) grand unification on a domain-wall brane from an E_6-invariant action
• SO(10) domain-wall brane models
• Fermion masses and mixing in a 4+1-dimensional SU(5) domain-wall brane model
• Localization of gauge fields and Maxwell-Chern-Simons theory
• Experimental Signatures of Split Fermions in Extra Dimensions