Abstract
The orbifold lines IIA/I8 and IIB/I8(-1)FL possess BPS discrete torsion variants which carry fundamental string (NSNS) charge. We show that these variants are actually classified by an integral electric field F from the twisted RR sector, and compute their tension and NSNS charge as a function of F. The analysis employs equivariant K-theory and the string creation phenomenon. The K-theory results demonstrate the corrections to cohomology in the case of torsion; it is found that 8 units of F are invisible at transverse infinity for IIA, and correspondingly 16 units for IIB.
Original language | English |
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Pages (from-to) | XXIX-24 |
Journal | Journal of High Energy Physics |
Volume | 5 |
Issue number | 5 |
DOIs | |
State | Published - 2001 |
Externally published | Yes |
Keywords
- P-branes
- Superstring vacua