Year: 2005
Type: article
Abstract: In this work we derive nonsingular BPS string solutions from an action that captures the essential features of a $D$-brane--anti-$D$-brane system compactified to four dimensions. The model we consider is a supersymmetric Abelian Higgs model with a $D$-term potential coupled to an axion-dilaton multiplet. The strings in question are axionic $D$-term strings which we identify with the $D$-strings of type II string theory. In this picture the Higgs field represents the open string tachyon of the $D\ensuremath{-}\overline{D}$ pair and the axion is dual to a Ramond-Ramond form. The crucial term allowing the existence of nonsingular BPS strings is the Fayet-Iliopoulos term, which is related to the tensions of the $D$-string and of the parent branes. Despite the presence of the axion, the strings are BPS and carry finite energy, due to the fact that the space gets very slowly decompactified away from the core, screening the long range axion field (or equivalently the theory approaches an infinitely weak $4D$ coupling). Within our $4D$ effective action we also identify another class of BPS string solutions ($s$-strings) which have no ten-dimensional analog, and can only exist after compactification.
Institution: New York University
Language: Latvian
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2027809117