Strings on Orbifold Lines

Details Strings on Orbifold Lines Strings on Orbifold Lines

2001-02-15

arxiv.org/abs/hep-th/0102095v2

JHEP 0105:019,2001

Physics

High Energy Physics

High Energy Physics - Theory

24 pages, 1 figure, LaTex. v2: published version

Scientific paper

10.1088/1126-6708/2001/05/019

The orbifold lines IIA/I_8 and IIB/$I_8 (-1)^{F_L} 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.

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