Why are fractional charges of orientifolds compatible with Dirac quantization?
Orientifold $p$-planes with $p\le4$ have fractional D$p$-charges, and therefore appear inconsistent with Dirac quantization with respect to D$(6-p)$-branes. We explain in detail how this issue is resolved by taking into account the anomaly of the worldvolume fermions using the $\eta$ invariants....
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| Format: | Article |
| Language: | English |
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SciPost
2019-11-01
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| Series: | SciPost Physics |
| Online Access: | https://scipost.org/SciPostPhys.7.5.058 |