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arXiv 1806.09372hep-thmath-phmath.MP
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无质量粒子的定域性、规范对称性和Newton-Wigner算符

Localizability, gauge symmetry and Newton-Wigner operator for massless particles

Piotr Kosinski, Pawel Maslanka

摘要:

详细讨论了无质量自旋粒子的位置算符的概念。坐标的非对易性与Wigner构造的庞加莱群诱导表象中标准态定义的自由性所导致的规范对称性有关。讨论了Newton-Wigner算子的对应形式。解释了为什么牛顿-维格纳构造只适用于螺旋度$ \midλ\mid\leq1/2$。

英文摘要:

The notion of position operator for massless spinning particles is discussed in some detail. The noncommutativity of coordinates is related to the gauge symmetry following from the freedom in definition of standard state in Wigner's construction of induced representations of Poincare group. The counterpart of Newton-Wigner operator is discussed. It is explained why the Newton-Wigner construction works only for helicity $ \midλ\mid\leq1/2$.

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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