E_8 flavour multiplets

Details E_8 flavour multiplets E_8 flavour multiplets

1998-02-26

arxiv.org/abs/hep-th/9802189v4

Phys.Rev. D58 (1998) 106005

Physics

High Energy Physics

High Energy Physics - Theory

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

Scientific paper

10.1103/PhysRevD.58.106005

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.

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