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arXiv 0901.4862hep-th
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OSp(3,2)的向量超对称性|2):Casimir算子

Vector Supersymmetry from OSp(3,2|2): Casimir Operators

Roberto Casalbuoni, Federico Elmetti, Joaquim Gomis, Kiyoshi Kamimura, Laura Tamassia, Antoine Van Proeyen

摘要:

本文简要地回顾了arXiv:0812.1982中的主要结果,其中研究了“向量超对称”(VSUSY)代数的一些代数性质. VSUSY是具有两个中心荷的四维Poincare代数的分次扩张。我们导出了VSUSY中所有独立的Casimir算符,并且在非零中心荷的情况下,我们发现了两个不同的自旋相关算符。一个是VSUSY的超自旋的类似物,另一个是一种新的自旋,称为C自旋,其值固定为1/2。我们还证明了VSUSY代数和它的Casimir算子可以由OSp(3,2)通过Inonu-Wigner压缩导出|2)。本文是基于在瓦尔纳,保加利亚,在第四届欧盟RTN研讨会2008年期间的谈话。

英文摘要:

In this paper we briefly review the main results obtained in arXiv:0812.1982, where some algebraic properties of the 'vector supersymmetry' (VSUSY) algebra have been studied. VSUSY is a graded extension of the Poincare' algebra in 4 dimensions with two central charges. We derive all independent Casimir operators of VSUSY and we find two distinct spin-related operators in the case of nonvanishing central charges. One is the analogue of superspin for VSUSY and the other is a new spin, called C-spin, whose value is fixed to 1/2. We also show that the VSUSY algebra and its Casimir operators can be derived by an Inonu-Wigner contraction from OSp(3,2|2). This paper is based on the talk given in Varna, Bulgaria, during the 4-th EU RTN Workshop 2008.

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