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Fermi acceleration under Lorentz invariance violation

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arxiv 2407.17254 v2 pith:YHLYSAOE submitted 2024-07-24 astro-ph.HE hep-ph

Fermi acceleration under Lorentz invariance violation

classification astro-ph.HE hep-ph
keywords accelerationfermiinvariancelorentzparticlesunderviolationassumption
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In this paper, the acceleration of particles in astrophysical sources by the Fermi mechanism is revisited under the assumption of Lorentz invariance violation (LIV). We calculate the energy spectrum and the acceleration time of particles leaving the source as a function of the energy beyond which the Lorentz invariance violation becomes relevant. Lorentz invariance violation causes significant changes in the acceleration of particles by the first and second-order Fermi mechanisms. The energy spectrum of particles accelerated by first-order Fermi mechanism under LIV assumption shows a strong suppression for energies above the break. The calculations presented here complete the scenario for LIV searches with astroparticles by showing, for the first time, how the benchmark acceleration mechanisms (Fermi) are modified under LIV assumption.

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  1. Fermi Acceleration Mechanisms Beyond Lorentz Symmetry

    gr-qc 2026-01 conditional novelty 6.0

    Fermi-accelerated cosmic-ray spectra acquire energy-dependent spectral indices under κ-Poincaré-deformed or Lorentz-violating kinematics, with a -2 to -3 index transition in the classical basis.