Spin(7)-manifolds and symmetric Yang--Mills instantons

Details Spin(7)-manifolds and symmetric Yang--Mills instantons Spin(7)-manifolds and symmetric Yang--Mills instantons

2001-10-17

arxiv.org/abs/hep-th/0110159v2

Phys.Lett. B521 (2001) 391-399

Physics

High Energy Physics

High Energy Physics - Theory

10 pages, no figures, LaTeX. More references have been added; but this version differs from the published one

Scientific paper

10.1016/S0370-2693(01)01239-4

In this Letter we establish a relationship between symmetric SU(2) Yang--Mills instantons and metrics with Spin(7)-holonomy. Our method is based on a slight extension of that of Bryant and Salamon developed to construct explicit manifolds with special holonomies in 1989. More precisely, we prove that making use of symmetric SU(2) Yang--Mills instantons on Riemannian spin-manifolds, we can construct metrics on the chiral spinor bundle whose holonomies are within Spin(7). Moreover if the resulting space is connected, simply connected and complete, the holonomy coincides with Spin(7). The basic example is the metric constructed on the chiral spinor bundle of the round four-sphere by using a generic SU(2)-instanton of unit action; hence it is a five-parameter deformation of the Bryant--Salamon example, also found by Gibbons, Page and Pope.

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