Einstein-Yang-Mills Solitons: The Role of Gravity

Details Einstein-Yang-Mills Solitons: The Role of Gravity Einstein-Yang-Mills Solitons: The Role of Gravity

2007-11-28

arxiv.org/abs/0711.4541v1

Phys.Lett.B657:255-256,2007

Physics

High Energy Physics

High Energy Physics - Theory

6 pages

Scientific paper

10.1016/j.physletb.2007.10.015

The canonical Bartnik-McKinnon solitons are regular solutions of the coupled Einstein-Yang-Mills system in which gravity may balance the repulsive nature of the Yang-Mills field. We examine the role played by gravity in balancing the system and determine its strength. In particular, we obtain an analytic lower bound on the fundamental mass-to-radius ratio, max{2m(r)/r}>2/3, which is a necessary condition for the existence of globally regular Einstein-Yang-Mills solitons. Our analytical results are in accord with numerical calculations.

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