# CPT and Lorentz Violation in the Photon and Z-Boson Sector

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## Abstract

**:**

## 1. Introduction

## 2. CPT and Lorentz Violation at Low Energy

## 3. Polarization Vectors

## 4. Analysis of the Dispersion Relation

## 5. Branch-Selection Function

## 6. Group Velocity

## 7. Extended Hamiltonian Formalism

## 8. Discussion

## Acknowledgments

## Conflicts of Interest

## References

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**Figure 1.**Plots of sample solutions to the $\lambda =\pm $dispersion relations for the Z boson (

**left**) and photon (

**right**). The size of the Lorentz-violating effects has been exaggerated for illustrational purposes.

**Figure 2.**Plots of the left- and right-hand side in Equation (33).

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**MDPI and ACS Style**

Colladay, D.; Noordmans, J.P.; Potting, R.
CPT and Lorentz Violation in the Photon and *Z*-Boson Sector. *Symmetry* **2017**, *9*, 248.
https://doi.org/10.3390/sym9110248

**AMA Style**

Colladay D, Noordmans JP, Potting R.
CPT and Lorentz Violation in the Photon and *Z*-Boson Sector. *Symmetry*. 2017; 9(11):248.
https://doi.org/10.3390/sym9110248

**Chicago/Turabian Style**

Colladay, Donald, Jacob P. Noordmans, and Robertus Potting.
2017. "CPT and Lorentz Violation in the Photon and *Z*-Boson Sector" *Symmetry* 9, no. 11: 248.
https://doi.org/10.3390/sym9110248