# Unitarity of time - like noncommutative gauge theories: The Violation of ward identities in time ordered perturbation theory

@article{Ohl2003UnitarityOT, title={Unitarity of time - like noncommutative gauge theories: The Violation of ward identities in time ordered perturbation theory}, author={Thorsten Ohl and Reinhold Ruckl and J{\"o}rg Zeiner}, journal={Nuclear Physics}, year={2003}, volume={676}, pages={229-242} }

## 33 Citations

### Violation of remaining Lorentz symmetry in the approach of time-ordered perturbation theory to space–time noncommutativity

- Physics, Mathematics
- 2005

### RENORMALIZATION OF NONCOMMUTATIVE QUANTUM FIELD THEORY

- Physics
- 2008

We recall some models for noncommutative space-time and discuss quantum field theories on these deformed spaces. We discribe the IR/UV mixing disease, which implies nonrenormalizability for a large…

### Noncommutative time in quantum field theory

- Physics
- 2011

We analyze, starting from first principles, the quantization of field theories, in order to find out to which problems a noncommutative time would possibly lead. We examine the problem in the…

### The Violation of Remaining Lorentz Symmetry in the Approach of TOPT to Space-Time Noncommutativity

- Physics, Mathematics
- 2004

We study remaining Lorentz symmetry, i.e. Lorentz transformations which leave the noncommutativity parameter θ invariant, within the approach of TOPT to space-time noncommutative theories. Their…

### Troubles with spacetime noncommutative theories: tachyons or S-branes?

- Physics, Mathematics
- 2004

We find lorentzian solutions of spacetime noncommutative gauge theories that are localized exponentially in space and time. Together with time translational invariance of the theories, we argue that…

### On general properties of Lorentz-invariant formulation of noncommutative quantum field theory

- Physics, Mathematics
- 2008

### Lorentz invariance, unitarity and UV-finiteness of QFT on noncommutative spacetime

- Physics, Mathematics
- 2004

Ultraviolet finite quantum field theory on even-dimensional noncommutative spacetime is formulated using coordinate coherent states. 2D spacetime is foliated into families of orthogonal,…

### Renormalisation of Noncommutative Quantum Field Theories

- Physics
- 2004

We sketch our proof that the real Euclidean ϕ4-model on the four-dimensional Moyal plane is renormalisable to all orders. The bare action of relevant and marginal couplings of the model is…

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Abstract. Assuming that the S-matrix on non-commutative (NC) spacetime can still be developed perturbatively in terms of the time-ordered exponential of the interaction Lagrangian, we investigate the…

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- 2003

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