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Generalized Lorentz invariance with an invariant energy scale

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arxiv gr-qc/0207085 v1 pith:N3U7YGQM submitted 2002-07-22 gr-qc

classification gr-qc
keywords energylorentzmomentumanomalyexamplesgeneralizedleadslight
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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 non-linear 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 ultra high 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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Cited by 3 Pith papers

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    A transverse deformation of the 2+1D de Sitter algebra yields energy-dependent transverse shifts and curvature-induced angular deviations for observers separated by a comoving distance.

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    For the cubic entropy correction S=πr_h²−αr_h³ arising from a Planck-scale modified dispersion relation, all physically allowed Schwarzschild-like branches have winding number w=−1, so no stable phase appears.

  3. On the Meaning of Localization in Non-Local Quantum Field Theory and On the Limits of a Space-Time Description and the Physical Meaning of Phase Space in a Nonlocal Continuum

    physics.gen-ph 2026-06 unverdicted novelty 4.0 of 10

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