Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2007-09-07
Phys.Rev.D77:125009,2008
Physics
High Energy Physics
High Energy Physics - Theory
13 pages, minor corrections, version to appear in Phys. Rev. D
Scientific paper
10.1103/PhysRevD.77.125009
The space-time symmetry of noncommutative quantum field theories with a deformed quantization is described by the twisted Poincar\'e algebra, while that of standard commutative quantum field theories is described by the Poincar\'e algebra. Based on the equivalence of the deformed theory with a commutative field theory, the correspondence between the twisted Poincar\'e symmetry of the deformed theory and the Poincar\'e symmetry of a commutative theory is established. As a by-product, we obtain the conserved charge associated with the twisted Poincar\'e transformation to make the twisted Poincar\'e symmetry evident in the deformed theory. Our result implies that the equivalence between the commutative theory and the deformed theory holds in a deeper level, i.e., it holds not only in correlation functions but also in (different types of) symmetries.
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