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arXiv 2102.08932hep-thmath-phmath.MP
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由共形代数的压缩得到的连续自旋表示

Continuous Spin Representation from Contraction of the Conformal Algebra

Abu Mohammad Khan

摘要:

本文讨论了共形代数的Inönü-Winger压缩。我们从Poincaré代数的光锥形式开始,并将其推广到$d$维的共形代数。为了简化共形代数,我们选取了五个维,并利用Kaluza-Klein降维方法将第三个横方向紧化为半径为$R$的圆.我们确定半径的倒数,$1/R$,作为收缩参数。在收缩之后,所得到的表示被发现是四维中的连续自旋表示。尽管标度对称性在收缩后仍然存在,但特殊的共形平移矢量发生了变化,并表现出类似于四动量矢量的行为。我们还讨论了推广到$d$维数的问题。

英文摘要:

In this paper, we discuss the Inönü-Winger contraction of the conformal algebra. We start with the light-cone form of the Poincaré algebra and extend it to write down the conformal algebra in $d$ dimensions. To contract the conformal algebra, we choose five dimensions for simplicity and compactify the third transverse direction in to a circle of radius $R$ following Kaluza-Klein dimensional reduction method. We identify the inverse radius, $1/R$, as the contraction parameter. After the contraction, the resulting representation is found to be the continuous spin representation in four dimensions. Even though the scaling symmetry survives the contraction, but the special conformal translation vector changes and behaves like the four-momentum vector. We also discussed the generalization to $d$ dimensions.

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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