Cutoff quantization and the Skyrmion.
Cutoff quantization and the Skyrmion.
复制标题
截止量化和斯格明子。
DOI：
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发表时间：
1992
期刊：
影响因子：
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通讯作者：
Subbaraman
中科院分区：
文献类型：
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作者：
Balakrishna;Sanyuk;Schechter;Subbaraman
假定的最小非线性{sigma}模型（无Skyrme项）中的经典孤子是不稳定的。我们注意到，施加一个短距离的截止（这无论如何是一个nonrenormalizable模型物理上合理的）产生一个稳定的经典孤子。我们进一步建议，这个截止，携带一些隐含的动力学信息，被视为一个量化的动力学变量。由此产生的一个（实验固定）参数模型与实验大致一致，以及简单的{sigma}模型{italwith} Skyrme项。我们解释这一功能的鲁棒性的说明核子作为一个刺猬型介子云占主导地位的指示。有人建议，同样的方法可能是有用的，在其他一些情况下，远距离的物理描述是更准确地知道比是短距离的描述。
The putative classical soliton in the minimal nonlinear {sigma} model (no Skyrme term) is known to be unstable to collapse. We note that the imposition of a short-distance cutoff (which is anyway physically reasonable for a nonrenormalizable model) yields a stable classical soliton. We further suggest that this cutoff, carrying as it does some implicit dynamical information, be treated as a quantized dynamical variable. The resulting one- (experimentally fixed) parameter model agrees with experiment roughly as well as the simple {sigma} model {ital with} the Skyrme term. We interpret this feature as an indication of the robustness of the description of the nucleon as being dominated by a hedgehog-type meson cloud. It is suggested that the same approach might be useful in some other situations where the long-distance description of the physics is more precisely known than is the short-distance description.