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arxiv: hep-th/0309155 · v3 · submitted 2003-09-16 · ✦ hep-th

Lorentz Invariance And Unitarity Problem In Non-Commutative Field Theory

classification ✦ hep-th
keywords theoryfieldnon-commutativeproblemunitarityamplitudeapproximationcommutative
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It is shown that the one-loop two-point amplitude in {\it Lorentz-invariant} non-commutative (NC) $\phi^3$ theory is finite after subtraction in the commutative limit and satisfies the usual cutting rule, thereby eliminating the unitarity problem in Lorentz-non-invariant NC field theory in the approximation considered.

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