Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2000-02-23
Nucl.Phys. B584 (2000) 329-358
Physics
High Energy Physics
High Energy Physics - Theory
39 pages, LaTeX2e, no figures; v2: Appendix B corrected, minor changes; v3: Abstract, Introduction and Section 5 revised to em
Scientific paper
10.1016/S0550-3213(00)00360-6
It was argued that there are two different descriptions of the effective Lagrangian of gauge fields on D-branes by non-commutative gauge theory and by ordinary gauge theory in the presence of a constant B field background. In the case of bosonic string theory, however, it was found in the previous works that the two descriptions are incompatible under the field redefinition which relates the non-commutative gauge field to the ordinary one found by Seiberg and Witten. In this paper we resolve this puzzle to observe the necessity of gauge-invariant but B-dependent correction terms involving metric in the field redefinition which have not been considered before. With the problem resolved, we establish a systematic method under the alpha' expansion to derive the constraints on the effective Lagrangian imposed by the compatibility of the two descriptions where the form of the field redefinition is not assumed.
Okawa Yuji
Terashima Seiji
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