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arXiv 1104.1478hep-th
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带电粒子的非对易磁矩

Noncommutative magnetic moment of charged particles

T. C. Adorno, D. M. Gitman, A. E. Shabad, D. V. Vassilevich

摘要:

有人认为,在非对易场论中,物理对象的尺寸不能小于与非对易参数有关的基本长度。将非对易U(1)_* 理论的场方程规范协变推广到有外源的情况,得到了扩展电荷产生的电场和磁场.我们发现,这样的电荷除了是一个普通的电偶极外,还是一个磁偶极子。通过对现有的轻子磁矩值的实验清除,我们得到了在10^4 TeV水平上的非对易性的界限。

英文摘要:

It has been argued, that in noncommutative field theories sizes of physical objects cannot be taken smaller than an elementary length related to noncommutativity parameters. By gauge-covariantly extending field equations of noncommutative U(1)_*-theory to the presence of external sources, we find electric and magnetic fields produces by an extended charge. We find that such a charge, apart from being an ordinary electric monopole, is also a magnetic dipole. By writing off the existing experimental clearance in the value of the lepton magnetic moments for the present effect, we get the bound on noncommutativity at the level of 10^4 TeV.

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