摘要
In the momentum space, the angular momentum operator and the boost vector operator,i.e. the generators for the Lorentz transformation of a particle with arbitrary spin and nonzero mass are discussed. Some new expressions are obtained in terms of the orbital and spin parts.
In the momentum space, the angular momentum operator and the boost vector operator, i.e. the generators for the Lorentz transformation of a particle with arbitrary spin and nonzero mass are discussed. Some new expressions are obtained in terms of the orbital and spin parts.
基金
This work was supported by Postdoctoral Science Foundation of China, the National Natural Science Foundation of China (Grant Nos. 19947001, 90103010 and 19991484)
the Research Fund for the Doctoral Program of Higher Education of China (97035807)
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