旋量粒子。质量和自旋分别固定的相对论动力系统运动的不确定性
Spinor particle. An indeterminacy in the motion of relativistic dynamical systems with separately fixed mass and spin
摘要:
我们给出了一个论点,一类广泛的几何模型的自旋相对论粒子与卡西米尔质量和自旋分别为固定参数,有不确定的世界线(而其他自旋粒子有明确的世界线)。这一悖论表明,为了对自旋粒子进行一致的描述,应该使用比世界线概念更一般的东西。作为一个特殊的情况下,我们研究了在拉格朗日水平的柯西问题的旋量粒子,然后,在约束哈密顿水平,我们推广我们的结果到其他粒子。
英文摘要:
We give an argument that a broad class of geometric models of spinning relativistic particles with Casimir mass and spin being separately fixed parameters, have indeterminate worldline (while other spinning particles have definite worldline). This paradox suggests that for a consistent description of spinning particles something more general than a worldline concept should be used. As a particular case, we study at the Lagrangian level the Cauchy problem for a spinor particle and then, at the constrained Hamiltonian level, we generalize our result to other particles.
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