# A Geometric Interpretation of the Open String Tachyon

@article{Kutasov2004AGI, title={A Geometric Interpretation of the Open String Tachyon}, author={David Kutasov}, journal={arXiv: High Energy Physics - Theory}, year={2004} }

Unstable, non-BPS D-branes in weakly coupled ten dimensional string theory have many mysterious properties. Among other things, it is not clear what sets their tension, what is their relation to the better understood BPS D-branes, and why the open string tachyon on them is described by an effective Lagrangian which suggests that the tachyon corresponds to an extra spatial dimension transverse to the branes. We point out that the dynamics of D-branes in the presence of Neveu-Schwarz fivebranes…

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