2013/07/26 by H. Krawczynski, Henric Krawczynski, Fabian Kislat +6
Physics and Astronomy · #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #High Energy Astrophysical Phenomena (astro-ph.HE) #High Energy Physics - Experiment (hep-ex) #Noncommutative and Quantum Gravity Theories #Particle physics theoretical and experimental studies #Relativity and Gravitational Theory #astro-ph.CO #astro-ph.HE #gr-qc #hep-ex
paper · pdf · doi:10.48550/arxiv.1307.6946
Contribution to the Proceedings of the Sixth Meeting on CPT and Lorentz Symmetry, Indiana University in Bloomington, Indiana, U.S.A., June 17-21, 2013. Four pages, two figures
arxiv created 2013/07/26 · openalex publication_date 2013/07/26 · arxiv updated 2013/07/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
X-ray and gamma-ray observations of astrophysical objects at cosmological distances can be used to probe the energy dependence of the speed of light with high accuracy and to search for violations of Lorentz invariance and CPT symmetry at the Planck energy scale. In this conference contribution, we discuss these searches in the theoretical framework of the Standard-Model Extension. We present new limits on the dispersion relation governed by operators of mass dimension d=5 and d=6, and we discuss avenues for future progress.