Quasi-localized states on noncommutative solitons

Abstract

We consider noncommutative gauge theories which have zero mass states propagating along both commutative and noncommutative dimensions. Solitons in these theories generically carry U(m) gauge group on their world-volume. From the point of view of string theory, these solitons correspond to ``branes within branes''. We show that once the world-volume U(m) gauge theory is in the Higgs phase, light states become quasi-localized, rather than strictly localized on the soliton, i.e. they mix with light bulk modes and have finite widths to escape into the noncommutative dimensions. At small values of U(m) symmetry breaking parameters, these widths are small compared to the corresponding masses. Explicit examples considered are adjoint scalar field in the background of a noncommutative vortex in U(1)-Higgs theory, and gauge fields in instanton backgrounds in pure gauge noncommutative theories.

27 pages, references and comments added, final version to appear in JHEP

References in corpus (5)

• Large and infinite extra dimensions
• Noncommutative Vortex Solitons
• Comma Vertex and String Field Algebra
• Tunneling into Extra Dimension and High-Energy Violation of Lorentz Invariance
• The Non-commutative Brane World

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