2009/07/31 by Alexander A. Andrianov, Alexander A Andrianov, Domenec Espriu +3 · 2 citations
Physics and Astronomy · #Neutrino Physics Research #Noncommutative and Quantum Gravity Theories #Particle physics theoretical and experimental studies #astro-ph.HE #gr-qc #hep-ph #hep-th
paper · pdf · doi:10.1088/1126-6708/2009/09/057
published as JHEP 0909:057,2009 · 13 pages, few refs and comments on electron radiation added
arxiv created 2009/09/05 · openalex publication_date 2009/09/10 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We entertain the idea that a suitable background of cold (very low momentum) pseudoscalar particles or condensate, may trigger a background that effectively generates Lorentz-invariance violation. This aether-like background induces a Chern-Simons modification of QED. Physics is different in different frames and, in the rest frame of the pseudoscalar background, high momentum photons can decay into pairs. The threshold for such decay depends quadratically on the rest mass of the particles. This mechanism could explain in a natural way why antiprotons are absent in recent cosmic ray measurements. A similar signal could be used as a probe of pseudoscalar condensation in heavy ion collisions.