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arXiv 0902.3688hep-thgr-qchep-exmath-phmath.MPquant-ph
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关于经典相对论性恒质量、万有质量和自旋粒子模型

On the model of a classical relativistic particle of constant and universal mass and spin

V. Kassandrov, N. Markova, G. Schaefer, A. Wipf

摘要:

本文讨论了A. Staruszkiewicz给出了一个自旋结构,它约束不变质量和不变自旋的值对于运动方程的任何解都是相同的。我们证明了这两个Casimir不变量,平方的四个动量矢量和平方的Pauli-Lubaiski伪矢量,保持相同的固定值,即使在存在一个任意的外部电磁场。在“自由”情况下,在质心参考系中,粒子沿着固定半径的圆运动。在一个均匀的磁场中,许多旋转“状态”是可能的,其频率与回旋频率略有不同,并且在粒子的三动量的某个临界值处发生自旋触发器的“类相位”跃迁。在最后一节中,Kuzenko,Lyakhovich和Segal(1994)的文章,其中,事实上,一个等价的模型已经提出和阐述,简要回顾和Staruszkiewicz的方法和我们的结果进行了比较。

英文摘要:

The deformation of the classical action for a free relativistic particle recently suggested by A. Staruszkiewicz gives rise to a spin structure which constrains the values of the invariant mass and the invariant spin to be the same for any solution of the equations of motion. We prove that both these Casimir invariants, the square of the four-momentum vector and the square of the Pauli-Lubański pseudo-vector, preserve the same fixed values even in the presence of an arbitrary external electromagnetic field. In the "free" case, in the centre of mass reference frame, the particle moves along a circle of fixed radius. In a homogeneous magnetic field, a number of rotational "states" is possible with frequencies slightly different from the cyclotron frequency, and "phase-like" transitions with spin flops occure at some critical value of the particle's three-momentum. In the last section, the article of Kuzenko, Lyakhovich and Segal (1994) in which, in fact, an equivalent model had been proposed and elaborated, is briefly reviewed and compared with Staruszkiewicz's approach and our results.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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