Positronium-like states from supergravity
arXiv:0904.2879 · doi:10.1016/j.nuclphysb.2009.07.014
Abstract
We study semi-classical rotating open strings ending on a probe Dp-brane close to a stack of extremal, non-extremal Dp-branes and Dp-branes with -fields. These states may be interpreted as positronium-like bound states of spinning W-bosons in an theory. In each case, we describe the behaviour of the strings and examine the relation between the energy and the angular momentum of the bound state.
12 pages, 6 figures, Minor corrections and added references
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