Strings on orbifold lines

Oren Bergman; Eric Gimon; Barak Kol

doi:10.1088/1126-6708/2001/05/019

Strings on orbifold lines

Oren Bergman^*, Eric Gimon, Barak Kol

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

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
Pages (from-to)	XXIX-24
Journal	Journal of High Energy Physics
Volume	5
Issue number	5
DOIs	https://doi.org/10.1088/1126-6708/2001/05/019
State	Published - 2001
Externally published	Yes

Keywords

P-branes
Superstring vacua

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10.1088/1126-6708/2001/05/019

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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.",

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author = "Oren Bergman and Eric Gimon and Barak Kol",

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AU - Gimon, Eric

AU - Kol, Barak

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N2 - 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.

AB - 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.

KW - P-branes

KW - Superstring vacua

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JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

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Strings on orbifold lines

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Keywords

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