螺旋基与宇称
Helicity Basis and Parity
摘要：
研究了螺旋度基下的（1/2，0）+（0，1/2）表示理论。螺旋本征态不是宇称本征态。这与Berestetskii，Lifshitz和Pitaevskii的考虑是一致的。讨论了与Gelfand-Tsetlin-Sokolik型量子场论的关系。最后，提出了一种新的奇偶算子形式。它与哈密尔顿算子交换。
英文摘要：
We study the theory of the (1/2,0)+(0,1/2) representation in helicity basis. Helicity eigenstates are not the parity eigenstates. This is in accordance with the consideration of Berestetskii, Lifshitz and Pitaevskii. Relations to the Gelfand-Tsetlin-Sokolik-type quantum field theory are discussed. Finally, a new form of the parity operator is proposed. It commutes with the Hamiltonian.
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