Time-ordered Perturbation Theory on Noncommutative Spacetime II: Unitarity

Details Time-ordered Perturbation Theory on Noncommutative Spacetime II: Unitarity Time-ordered Perturbation Theory on Noncommutative Spacetime II: Unitarity

2002-06-02

arxiv.org/abs/hep-th/0206011v2

Eur.Phys.J.C25:479-486,2002

Physics

High Energy Physics

High Energy Physics - Theory

19 pages, 3 figures using axodraw; version 2: typos fixed and very minor rewording, to appear in Eur Phys J C

Scientific paper

10.1007/s10052-002-1018-7

We examine the unitarity issue in the recently proposed time-ordered perturbation theory on noncommutative (NC) spacetime. We show that unitarity is preserved as long as the interaction Lagrangian is explicitly Hermitian. We explain why it makes sense to distinguish the Hermiticity of the Lagrangian from that of the action in perturbative NC field theory and how this requirement fits in the framework.

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