This book contains the Proceedings of the Fifth Meeting on CPT and Lorentz Symmetry, held at Indiana University in Bloomington from June 28 to July 2, 2010. The Meeting focused on tests of these fundamental symmetries and on related theoretical issues, including scenarios for possible violations.Topics covered at the meeting include searches for CPT and Lorentz violations involving: birefringence and dispersion from cosmological sources, clock-comparison measurements, CMB polarization, electromagnetic resonant cavities, equivalence principle, gauge and Higgs particles, high-energy astrophysical observations, laboratory and gravimetric tests of gravity, matter interferometry, neutrino oscillations, oscillations and decays of K,D,B mesons, particle-antiparticle comparisons, post-newtonian gravity in the solar system and beyond, second- and third-generation particles, space-based missions, spectroscopy of hydrogen and antihydrogen, and spin polarized matter. Theoretical discussions include physical effects at the level of the Standard Model, General Relativity, and beyond; the possible origins and mechanisms for Lorentz and CPT violations; and related classical and quantum issues in field theory, particle physics, gravity, and string theory.

This book contains the proceedings of the Fourth Meeting on CPT and Lorentz Symmetry, held at Indiana University in Bloomington on August 8-11, 2007. The Meeting focused on experimental tests of these fundamental symmetries and on important theoretical issues, including scenarios for possible relativity violations.Experimental subjects covered include: astrophysical observations, clock-comparison measurements, cosmological birefringence, electromagnetic resonant cavities, gravitational tests, matter interferometry, muon behavior, neutrino oscillations, oscillations and decays of neutral mesons, particle-antiparticle comparisons, post-Newtonian gravity, space-based missions, spectroscopy of hydrogen and antihydrogen, and spin-polarized matter. Theoretical topics covered include: physical effects at the level of the Standard Model, General Relativity, and beyond; the possible origins and mechanisms for Lorentz and CPT violations; and associated issues in field theory, particle physics, gravity, and string theory. Contributors consist of the leading experts in this very active research field.

Contents:

• CPT, SSB, Ether, and All That (Y Nambu)
• Sub-Millimeter Tests of the Gravitational Inverse Square Law (E G Adelberger)
• Test of CPT and Lorentz Invariance from Muonium Spectroscopy (D Kawall et al.)
• Study of CPT Violation at BELLE (Y Sakai)
• Tests of CPT and Lorentz Symmetry Using Hydrogen and Noble-Gas Masers (R L Walsworth)
• CPT and Lorentz Tests with Clocks in Space (N E Russell)
• CPT Results from KTeV (H Nguyen)
• Physical Instances of Noncommuting Coordinates (R Jackiw)
• Torsion Balance Tests of Spin Coupled Forces (B R Heckel)
• Prospects for Symmetry Breaking in String Theory (R Potting)
• Cold Antihydrogen and CPT (G Gabrielse et al.)
• and other papers

Readership: Theoretical and experimental physicists with an interest in relativity and space-time symmetries.