Cited by 691Noncommutative and Quantum Gravity TheoriesRelativity and Gravitational TheoryCosmology and Gravitation Theories

Generalized Lorentz invariance with an invariant energy scale

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Magueijo, João, Smolin, Lee·2003·Physical Review D

Abstract

The hypothesis that the Lorentz transformations may be modified at Planck scale energies is further explored. We present a general formalism for theories which preserve the relativity of inertial frames with a nonlinear action of the Lorentz transformations on momentum space. Several examples are discussed in which the speed of light varies with energy and elementary particles have a maximum momenta and/or energy. Energy and momentum conservation are suitably generalized and a proposal is made for how the new transformation laws apply to composite systems. We then use these results to explain the ultrahigh-energy cosmic ray anomaly and we find a form of the theory that explains the anomaly, and leads also to a maximum momentum and a speed of light that diverges with energy. We finally propose that the spatial coordinates be identified as the generators of translation in Minkowski spacetime. In some examples this leads to a commutative geometry, but with an energy dependent Planck constant.

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Authors
Magueijo, J., & Smolin, L.
Affiliations
  • Imperial College London (GB)
  • University of Waterloo (CA)
Venue
Physical Review D
Published
2003-02-27
Volume
67
Issue
4
ISSN
  • 0556-2821 (ISSN-L)
  • 1089-4918
OpenAlex
W2152978115
Cited by
691
References
38
Citations by year
2026: 9 · 2025: 24 · 2024: 23 · 2023: 27 · 2022: 25 · 2021: 31 · 2020: 25 · 2019: 31 · 2018: 33 · 2017: 37 · 2016: 45 · 2015: 36 · 2014: 32 · 2013: 39 · 2012: 41
FWCI
19.03
Type
journal article
Language
en
Open access
Locations
  • Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • CERN Document Server (European Organization for Nuclear Research) (submittedVersion)
  • arXiv (Cornell University)
Topics
  • Physical Sciences › Physics and Astronomy › Statistical and Nonlinear Physics › Noncommutative and Quantum Gravity Theories
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Relativity and Gravitational Theory
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Cosmology and Gravitation Theories
Keywords
Planck scale, energy-dependent speed of light, energy conservation (physics), momentum conservation, composite systems, ultra-high-energy cosmic rays, momentum space

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