This book contains the Proceedings of the Seventh Meeting on CPT and Lorentz Symmetry, held at Indiana University in Bloomington on June 20-24, 2016. Requiring only the standard three-generation model of particle physics (with right-handed neutrinos), a Z2 symmetry This article reviews the conditions under which CPT symmetry holds by recalling two proofs of the CPT theorem: The original Lagrangian-based analysis and the more rigorous one in the context of axiomatic quantum field theory. In CPT symmetry, space is inverted, time is reversed without changing the sign of the energy of physical states and particle-and-antiparticle are interchanged. These symmetry violations arise only from the weak interaction, not from the strong and electromagnetic interactions, and therefore show up strongly only in beta decay. CPT Symmetry in Projective de Sitter Universes Ignazio Licata1,2, Davide Fiscaletti3, Leonardo Chiatti4 and Fabrizio Tamburini5 1 ISEM, Institute for Scientific Methodology, Palermo, Italy. 3 SpaceLife Institute, San Lorenzo in Campo, PU 61047, Italy. The restriction of the standard model extension to … A CPT-violating interaction in the photon sector gives rise to a rotation of the polarization vectors of the propagating CMB photons. Charge Parity Time (CPT) symmetry predicts the fundamental properties of antimatter should have the same magnitude as matter , and a violation of CPT symmetry would break the standard model Precision measurements on antimatter are necessary in order to test CPT symmetry and try to find an explanation for the missing antimatter T-violation, in this context means an asymmetry, not only under the reversal of the sign of t Lorentz and CPT symmetry. The meeting focused on tests of these fundamental symmetries and on related theoretical issues, including scenarios for possible violations. 2 School of Advanced International Studies on Applied Theoretical and Non-LinearMethodologies in Physics, Bari, Italy. In fact, only those coeﬃcients with odd numbers of indices (a, b, e, f, and g) are odd under CPT. Since both CPT and Lorentz invariance involve spacetime transformations, it is CPT symmetry selects a unique QFT vacuum state on such a spacetime, providing a new interpretation of the cosmological baryon asymmetry, as well as a remarkably economical explanation for the cosmological dark matter. In this talk, the formalism for inclusion of such e ects into a low-energy e ective eld theory is presented. As noted, CPT violation in quantum ﬁeld theory implies a breaking of Lorentz symmetry as well. CPT symmetry is broken one or more of the assumptions necessary to prove the CPT theorem must be false. A Test of CPT and Lorentz Symmetry Using a K-3He Co-magnetometer Thomas Whitmore Kornack A DISSERTATION PRESENTED TO THE FACULTY OF PRINCETON UNIVERSITY IN CANDIDACY FOR THE DEGREE OF DOCTOR OF PHILOSOPHY RECOMMENDED FOR ACCEPTANCE BY THE DEPARTMENT OF ASTROPHYSICAL SCIENCES NOVEMBER, 2005. There are fundamental reasons for expecting that nature at a minimum has CPT symmetry—that no asymmetries will be found after reversing charge, space, and time. The quantities position (r), momentum (p), charge (q), angular momentum (L) and magnetic moment (µ) transform as under CPT. One of the most fundamental symmetries in physics is CPT invariance. An extension of the standard model that includes Lorentz- and CPT-breaking terms is developed. eﬁects to match observations. Surprisingly, there is precisely one such symmetry-CPT symmetry. Increasing entropy is NOT the only process that's asymmetric in time. In the context of theories that have CPT symmetry, as all ﬂeld theories do, there is an automatic connection between ant CP-violation and a related T-violation. In this Letter we update our previous results on the test of CPT symmetry with cosmic microwave background (CMB) measurements. symmetry. However, the converse does not hold; not all forms of Lorentz violation necessarily violate CPT. This leads to the obvious question which one of the fundamental assumptions in the CPT theorem should be dropped.