Branes Ending On Branes In A Tachyon Model

TL;DR

This paper constructs various brane configurations within a tachyon model derived from boundary string field theory, including bound states, junctions, and branes ending on others, and verifies their physical consistency.

Contribution

It introduces new solutions representing complex brane setups in a tachyon model, including bound states and junctions, with analysis of their BPS bounds and physical properties.

Findings

Constructed Dp-D(p-2) bound states and string junctions.

Derived BPS equations and checked energy and charge distributions.

Proposed conjectures for additional brane configurations.

Abstract

In a tachyon model proposed by Minahan and Zwiebach and derived in the boundary string field theory, we construct various new solutions which correspond to nontrivial brane configurations in string theory. Our solutions include Dp-D(p-2) bound states, (F, Dp) bound states, string junctions, D(p-2)-branes ending on a Dp-brane, D(p-2)-branes suspended between parallel Dp-branes and their non-commutative generalizations. We find the Bogomol'nyi bounds and the BPS equations for some of our solutions, and check the physical consistency of our solutions with the D-brane picture by looking at the distributions of their energies and RR-charges in space. We also give conjectures for a few other brane configurations.