D-branes in non-tachyonic 0B orientifolds

Abstract

We determine all D-branes in the non-tachyonic 0'B orientifold, examine their world-volume anomalies and study orbifold compactifications. We find that the spectrum of the D-branes contains chiral fermions in the symmetric, antisymmetric and fundamental representations of (unitary) gauge groups on the branes. The cancellation of the world-volume anomalies requires Wess-Zumino terms which we determine explicitly. We examine a non-tachyonic compactification to 9D whose closed part interpolates between 0B and IIB and revisit compactifications on orbifolds. The D3-brane allows to conjecture, via the AdS/CFT correspondence, a supergravity dual to a non-supersymmetric and infrared-free gauge theory. The D-string gives hints concerning the S-dual of the 0'B orientifold.

38 pages, LaTeX, references added, eq.(100) generalized to contain the N-dependence

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• Time and space dependent backgrounds from nonsupersymmetric strings
• String Defects, Supersymmetry and the Swampland
• Supersymmetry Breaking and Stability in String Vacua: brane dynamics, bubbles and the swampland
• Brane-Inspired Orientifold Field Theories
• Non-tachyonic Scherk-Schwarz compactifications, cosmology and moduli stabilization
• Type $\bar{0}$ Heterotic String Orbifolds
• Modular invariance, misalignment and finiteness in non-supersymmetric strings
• Orientifolds of String Theory Melvin backgrounds
• Alternative large Nc baryons and holography
• Type 0 ${\mathbb{Z}}_2\times {\mathbb{Z}}_2$ Heterotic String Orbifolds and Misaligned Supersymmetry
• Shedding light on dark bubble cosmology
• Supersymmetry breaking, brane dynamics and Swampland conjectures
• A class of non-supersymmetric orientifolds