CPT Symmetry

Dear Colleagues,

CPT, the product of three individual discrete symmetries, C (charge exchange), P (parity), and T (time reversal), is a cornerstone of the Standard Model (SM) of particle physics. While some of the individual symmetries were found to be violated (the observation of the violation of P and CP symmetry in the weak interaction contributed strongly to the development of the SM), CPT conservation is the consequence of the mathematical properties of the quantum field theories used in the SM, and, thus, has the status of a theorem. Extensions of the SM, such as string theory or quantum gravity, however, do not have the mathematical properties required for the proof of the CPT theorem, thus leaving a window open for possible violations of the CPT symmetry that can be experimentally searched for. A framework where CPT violation is linked to Lorentz invariance violation is the Standard Model Extension, where many tests are being performed.

In this Special Issue we invite contributions of theoretical papers that deal with possible scenarios creating violations of CPT, and experimental papers searching for these violations including violations of Lorentz symmetry which is closely connected to CPT.

Prof. Dr. Eberhard Widmann
Guest Editor

Manuscript Submission Information

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