Quasi-localized states on noncommutative solitons

Details Quasi-localized states on noncommutative solitons Quasi-localized states on noncommutative solitons

2002-01-04

arxiv.org/abs/hep-th/0201025v2

JHEP 0201 (2002) 037

Physics

High Energy Physics

High Energy Physics - Theory

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

Scientific paper

10.1088/1126-6708/2002/01/037

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.

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