On Orientifolds, Discrete Torsion, Branes and M Theory

Amihay Hanany; Barak Kol

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On Orientifolds, Discrete Torsion, Branes and M Theory

Amihay Hanany, Barak Kol

High Energy Physics - Theory · Submitted 3 Mar 2000

abstract compiled · 2026-09-23 · no language-model review

The authors' main claim We find some lifts to M theory of orientifold and orbifold planes including the O1, O3 and O5 planes of Type IIB and their transformations under SL(2,Z).

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We find some lifts to M theory of orientifold and orbifold planes including the O1, O3 and O5 planes of Type IIB and their transformations under SL(2,Z). The possible discrete torsion variants (or K theory classes) are explored, and are interpreted as arising from brane intersections with planes. We find new variants of the O0 and of an orbifold line (OF1) and determine their tensions in some cases. A systematic review of orientifolds, M orientifolds, and known M lifts, with some new clarifications is included together with a discussion of the role of T duality.

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#	sentence	role	the authors' own work	states the main conclusion	strength
s0	We find some lifts to M theory of orientifold and orbifold planes including the O1, O3 and O5 planes of Type IIB and their transformations under SL(2,Z).	result 0.71	0.94	0.31	asserted 1.00
s1	The possible discrete torsion variants (or K theory classes) are explored, and are interpreted as arising from brane intersections with planes.	contribution 0.49	0.83	0.17	asserted 0.76
s2	We find new variants of the O0 and of an orbifold line (OF1) and determine their tensions in some cases.	result 0.71	0.94	0.16	asserted 1.00
s3	A systematic review of orientifolds, M orientifolds, and known M lifts, with some new clarifications is included together with a discussion of the role of T duality.	contribution 0.62	0.59	0.09	asserted 0.99

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Original abstract

We find some lifts to M theory of orientifold and orbifold planes including the O1, O3 and O5 planes of Type IIB and their transformations under SL(2,Z). The possible discrete torsion variants (or K theory classes) are explored, and are interpreted as arising from brane intersections with planes. We find new variants of the O0 and of an orbifold line (OF1) and determine their tensions in some cases. A systematic review of orientifolds, M orientifolds, and known M lifts, with some new clarifications is included together with a discussion of the role of T duality.

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How the literature uses it

56 arXiv papers cite this in 97 sentences

Each citing sentence is taken from the citing paper's LaTeX source and typed by Pith's classifier. A label appears at probability 0.8 or more (0.95 for support), a contest at 0.7 or more; the quoted words are the citing authors'. How each label was checked · JSON

Papers citing it · 76 sentences without a confident label

Cites it as background 17 papers

We can classify them according to their five-brane charge and discrete torsions for the NS three-form $H_3$ and the RR one-form $F_1$ [ref] .

Comments on the String dual to N=1 SQCD · The case of $SO(N_c)$ gauge group · 0.80
The fixed locus of the $ℤ_2$ action is sometimes referred to as an OM5-plane [ref] .

SymTFTs and Non-Invertible Symmetries of 6d (2,0) SCFTs of Type $D$ from M-theory · Holographic derivation in M-theory · 0.93
To begin with, recall [ref] * An O$p^±$ becomes an O$p^∓$ when passing through a half ; likewise, $Op^±$ turns into $Op^∓$.

Magnetic quivers and negatively charged branes · Brane creation and annihilation · 0.93

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