Renormalizability of the open string sigma model and emergence of D – branes

@inproceedings{Kummer2000RenormalizabilityOT,
title={Renormalizability of the open string sigma model and emergence of D – branes},
author={WienAustriaW. Kummer and D. V. Vassilevich},
year={2000}
}

Rederiving the one-loop divergences for the most general coupling of the open string sigma model by the heat kernel technique, we distinguish the classical background field from the mean field of the effective action. The latter is arbitrary, i.e. does not fulfil the boundary conditions. As a consequence a new divergent counter term strongly suggests the introduction of another external one-form field (beside the usual gauge field), coupled to the normal derivative at the boundary. Actually… CONTINUE READING