34 research outputs found

    NS fivebranes in type 0 string theory

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    The massless degrees of freedom of type 0 NS5-branes are derived. A non-chiral, purely bosonic spectrum is found in both type 0A and 0B. This non-chirality is confirmed by a one-loop computation in the bulk. Some puzzles concerning type 0B S-duality are pointed out in this context. An interpretation of the spectra in terms of ``type 0 little strings'' is proposed.Comment: LaTeX, 12 pages, no figures; v3: section on S-duality revised, references added, to be published in JHE

    Ramond-Ramond couplings of non-BPS D-branes

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    We study how non-BPS type II D-branes couple to R-R potentials. Upon tachyon condensation the couplings we find give rise to the Wess-Zumino action of BPS D-branes.Comment: LaTeX, 8 pages, no figures; minor changes, reference added, to be published in JHE

    (Non-)Anomalous D-brane and O-plane couplings: the normal bundle

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    The direct string computation of anomalous D-brane and orientifold plane couplings is extended to include the curvature of the normal bundle. The normalization of these terms is fixed unambiguously. New, non-anomalous gravitational couplings are found.Comment: 6 pages, latex, no figures; version accepted for publication in Phys. Lett.

    Essays in Bounded Rationality and Strategic Interaction

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    Jackstone Calculus: A Spiky Cause of Haematuria

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