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An improved harmonic map ansatz
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DOI：10.1016/j.physletb.2004.07.033.png)
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Abstract
En 中文
The rational map ansatz of Houghton et al. [Nucl. Phys. B 510 (1998) 507] is generalised by allowing the profile function, usually a function of r, to depend also on z and (z) over bar. It is shown that, within this ansatz, the energies of the lowest B = 2, 3, 4 field configurations of the SU(2) Skyrme model are closer to the corresponding values of the true solutions of the model than those obtained within the original rational map ansatz. In particular, we present plots of the profile functions which do exhibit their dependence on z and (z) over bar. The obvious generalisation of the ansatz to higher SU(N) models involving the introduction of more projectors is briefly mentioned. (C) 2004 Elsevier B.V. All rights reserved.
Keywords:
RATIONAL MAPS
SKYRMIONS
MODEL
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