E_8 flavour multiplets

Abstract

We analyze gauge symmetry enhancements $SO(16)\to E_8$ on eight D7-branes and $SO(14)\times U(1)\to E_8$ on seven D7-branes from open strings. String configurations which we present in this paper are closely related to the ones given by Gaberdiel and Zwiebach. Our construction is based on $SO(8)\times SO(8)$ decomposition and its relation to the D8-brane case via T-duality is clearer. Then we study supersymmetric Yang-Mills theory on D3-brane near the D7-branes. This theory has flavour symmetry group which is equal to the gauge group on D7-branes. We suggest that when this symmetry is enhanced, two dyons make bound states which, together with elementary quarks, constitute an $E_8$ multiplet.

17 pages + 15 eps figures, LaTeX, minor change in Section 3

References in corpus (4)

• Type IIB Superstrings, BPS Monopoles, And Three-Dimensional Gauge Dynamics
• Exceptional groups from open strings
• String Creation and Heterotic-Type I' Duality
• String Junctions and BPS States in Seiberg-Witten Theory

Cited by in corpus (5)

• String Webs and 1/4 BPS Monopoles
• String Junction Transitions in the Moduli Space of N=2 SYM
• Affine 7-brane Backgrounds and Five-Dimensional $E_N$ Theories on $S^1$
• Map of Heterotic and Type IIB Moduli in 8 Dimensions
• String junctions on backgrounds with a positively charged orientifold plane