U(1) gauge invariance from open string field theory

Details U(1) gauge invariance from open string field theory U(1) gauge invariance from open string field theory

2000-05-09

arxiv.org/abs/hep-th/0005085v2

JHEP 0010 (2000) 017

Physics

High Energy Physics

High Energy Physics - Theory

Section on transverse photon at tachyon condensate added, 23 pages, Uses JHEP.cls

Scientific paper

10.1088/1126-6708/2000/10/017

The naive low energy effective action of the tachyon and the U(1) gauge field obtained from string field theory does not correspond to the world volume action of unstable branes in bosonic string theory. We show that there exists a field redefinition which relates the gauge field and the tachyon of the string field theory action to the fields in the world volume action of unstable branes. We identify a string gauge symmetry which corresponds to the U(1) gauge transformation. This is done to the first non-linear order in the fields. We examine the vector fluctuations at the tachyon condensate till level (4,8).

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