====== CPT Symmetry====== CPT symmetry means that a mirror-image of our universe where we reverse all momenta (corresponding to the reversal of time) and with all matter replaced by anti-matter would evolve under exactly the same physical laws. A nice introduction is [[https://www.youtube.com/watch?v=yArprk0q9eE&feature=youtu.be|this video by Veritasium]]. * See [[https://arxiv.org/pdf/hep-ph/0309309.pdf|WHY IS CPT FUNDAMENTAL?]] by O.W. Greenberg * The standard reference is "PCT, spin and statistics, and all that" by R. F. Streater and A. S. Wightman. According to the famous [[theorems:cpt|CPT theorem]] the symmetry CPT holds for //all// physical phenomena under quite reasonable assumptions. This makes CPT symmetry one of the most important symmetries of modern especially and especially of the [[models:standard_model|standard model of particle physics]]. * For the experimental status of CPT symmetry see the [[https://arxiv.org/abs/0801.0287|Data Tables for Lorentz and CPT Violation]] by Alan Kostelecky, Neil Russell