Classical Lagrange Functions for the SME

A technique is presented for finding the classical Lagrange function corresponding to a given dispersion relation. This allows us to study the classical analogue of the Standard-Model Extension. Developments are discussed.Comment: 5pp. Presented at the Fifth Meeting on CPT and Lorentz Symmetry, Bloomington, Indiana, June 28-July 2, 201

Tests of Lorentz Symmetry with Penning Traps and Antihydrogen

Possibilities for testing Lorentz symmetry using precision experiments with antiprotons in Penning traps and with antihydrogen spectroscopy are reviewed. Estimates of bounds on relevant coefficients for Lorentz violation in the Standard-Model Extension (SME) are considered.Comment: 8pp, proceedings of invited talk at 8th International Conf. on Low Energy Antiproton Physics (LEAP '05), Bonn, Germany, May 200

Lorentz Violation and Torsion

In this proceedings, similarities between the structure of theories with Lorentz violation and theories with constant torsion in flat spacetime are exploited to place bounds on torsion components. An example is given showing the analysis leading to bounds on the axial-vector and mixed-symmetry components of torsion, based on a dual-maser experiment.Comment: 5 pp, talk given at 4th Meeting on Lorentz and CPT Violation, Bloomington, Indiana, USA, 8-11 August 200