Orientifold and F-theory Duals of CHL Strings

Abstract

We present orientifold and F-theory duals of the heterotic string compactification constructed by Chaudhuri, Hockney and Lykken (CHL) which has the maximal supersymmetry but gauge group of reduced rank. The 8-dimensional dual is given by the Type IIA orientifold on the Möbius band. We show the non-trivial monodromy on the base induces non-simply laced gauge groups on the F-theory orbifolds dual to the CHL strings. The F-theory models dual to the CHL strings in six dimensions are examples of N=2 F-theory vacua. We discuss the other N=2 F-theory vacua in six dimensions.

13 pages, harvmac; Several clarifying corrections, a version to appear in Physics Letter B

References in corpus (20)

• Dirichlet-Branes and Ramond-Ramond Charges
• Heterotic and Type I String Dynamics from Eleven Dimensions
• Evidence for F-Theory
• Compactifications of F-Theory on Calabi--Yau Threefolds -- II
• Evidence for Heterotic - Type I String Duality
• Compactifications of F-Theory on Calabi--Yau Threefolds -- I
• Small Instantons in String Theory
• Consistency Conditions for Orientifolds and D-Manifolds
• Geometric Singularities and Enhanced Gauge Symmetries
• F-theory and Orientifolds
• F-Theory at Constant Coupling
• K3 Orientifolds
• Strings on Orientifolds
• Branes, Calabi-Yau Spaces, and Toroidal Compactification of the N=1 Six-Dimensional E_8 Theory
• The SO(32) Heterotic String on a K3 Surface
• An Orientifold of Type-IIB Theory on $K3$
• Type IIA-Heterotic Duals With Maximal Supersymmetry
• A Note on Orientifolds and F-theory
• Monstrous String-String Duality
• Recent Results in String Duality

Cited by in corpus (13)

• Aspects of N=1 Type I-Heterotic Duality in Four Dimensions
• On Type IIB Vacua With Varying Coupling Constant
• Four Dimensional $\mathcal{N}=4$ SYM and the Swampland
• Compactness of Brane Moduli and the String Lamppost Principle in $d>6$
• Type IIB orientifolds on Gepner points
• The Moduli Space and M(atrix) Theory of 9d N=1 Backgrounds of M/String Theory
• The twelve dimensional super (2+2)-brane
• The N=1* Theories on R^{1+2} X S^1 with Twisted Boundary Conditions
• Orientifolds and twisted boundary conditions
• The duality between F-theory and the Heterotic String in $D=8$ with two Wilson lines
• Toric Geometry and String Theory
• Confinement and the Short Type I' Flux Tube
• Lost Chapters in CHL Black Holes: Untwisted Quarter-BPS Dyons in the ${\mathbb{Z}}_2$ Model