Bound states of Dbranes and the nonabelian BornInfeld action
Abstract
We attempt to settle the issue as to what is the correct nonabelian generalisation of the BornInfeld action, via a consideration of the twoloop βfunction for the nonabelian background gauge field in open string theory. An analysis of the bosonic theory alone shows the recent proposal of Tseytlin [A.A. Tseytlin, Nucl. Phys. B 501 (1997) 41] to be somewhat lacking. For the superstring, however, this proposal would seem to be correct, and not just within the approximation used. Since it is this latter case that is relevant to the description of Dbranes, we, in effect, obtain an independent verification of Tseytlin's result. Some issues involved in the concept of nonabelian Tduality are discussed; and it is shown how the interaction between separated and parallel branes, in the form of massive string states, emerges.
 Publication:

Nuclear Physics B
 Pub Date:
 August 1998
 DOI:
 10.1016/S05503213(98)002971
 arXiv:
 arXiv:hepth/9801127
 Bibcode:
 1998NuPhB.527..121B
 Keywords:

 High Energy Physics  Theory
 EPrint:
 24 pages, 4 eps figures, LaTeX. Further comments concerning earlier work added, minor typos corrected. Version to be published in Nucl. Phys. B