Perturbation theory of the space-time non-commutative real scalar field theories

Details Perturbation theory of the space-time non-commutative real scalar field theories Perturbation theory of the space-time non-commutative real scalar field theories

2003-12-30

arxiv.org/abs/hep-th/0312308v2

Phys.Rev. D70 (2004) 025006

Physics

High Energy Physics

High Energy Physics - Theory

Latex 26 pages, notations modified, add references

Scientific paper

10.1103/PhysRevD.70.025006

The perturbative framework of the space-time non-commutative real scalar field theory is formulated, based on the unitary S-matrix. Unitarity of the S-matrix is explicitly checked order by order using the Heisenberg picture of Lagrangian formalism of the second quantized operators, with the emphasis of the so-called minimal realization of the time-ordering step function and of the importance of the $\star$-time ordering. The Feynman rule is established and is presented using $\phi^4$ scalar field theory. It is shown that the divergence structure of space-time non-commutative theory is the same as the one of space-space non-commutative theory, while there is no UV-IR mixing problem in this space-time non-commutative theory.

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