1999/05/24 by Luis Gonzalez‐Mestres, Luis Gonzalez-Mestres, Gonzalez-Mestres, Luis
Medicine · Physics and Astronomy · #Cosmology and Gravitation Theories #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Noncommutative and Quantum Gravity Theories #Radiation Therapy and Dosimetry #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/9905454
4 pages, contributed paper OG.3.1.10 to the 26th ICRC, Utah August 17-25, 1999
arxiv created 1999/05/24 · openalex publication_date 1999/05/24 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Present low-energy bounds on Lorentz symmetry violation do not allow to exclude the possible existence of superluminal particles (superbradyons) with critical speed in vacuum ci ≫ c (c = speed of light) whose kinematical properties would be close to of "ordinary" particles (bradyons) apart from the difference in critical speed. If they exist, superbradyons may be the basic building blocks of vacuum and and matter at Planck scale, provide most of the matter in the Universe and be natural dark matter candidates. We present an updated discussion of their theoretical and experimental properties, especially as cosmic ray primaries or sources, as well as problems related to their possible direct detection.