Boundary String Field Theory as a Field Theory -- Mass Spectrum and Interaction

Details Boundary String Field Theory as a Field Theory -- Mass Spectrum and Interaction Boundary String Field Theory as a Field Theory -- Mass Spectrum and Interaction

2004-08-11

arxiv.org/abs/hep-th/0408094v2

JHEP0410:040,2004

Physics

High Energy Physics

High Energy Physics - Theory

39 pages, 1 eps figure, JHEP style, typos corrected

Scientific paper

10.1088/1126-6708/2004/10/040

We study the BSFT actions by using an analytic continuation in momentum space. We compute various two- and three- point functions for some low-lying excitations including massive states on BPS/non-BPS D-branes. The off-shell two-point functions for the tachyon, the gauge field and the massive fields are found to reproduce the well-known string mass-shell conditions. We compare our action with the tachyon actions previously obtained by the derivative expansion (or the linear tachyon profiles), and find complete agreement. Furthermore, we reproduce the correct on-shell value of the tachyon-tachyon-gauge three-point function on brane-anti-brane systems. Though inclusion of the massive modes has been thought difficult because of the non-renormalizability in string sigma models, we overcome this by adopting general off-shell momenta and the analytic continuation.

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