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Lorentz Violation for Photons and Ultra-High Energy Cosmic Rays

M. Galaverni G. Sigl 1
APC (UMR_7164) - AstroParticule et Cosmologie, Institut für theoretische Physik
Abstract : Lorentz symmetry breaking at very high energies may lead to photon dispersion relations of the form omega^2=k^2+m^2+xi_n k^2(k/M_Pl)^n with new terms suppressed by a power n of the Planck mass M_Pl. We show that first and second order terms of size xi_1 >~ 10^(-14) and xi_2 >~ 10^(-6), respectively, would lead to a photon component in cosmic rays above 10^(19) eV that should already have been detected. Only effects suppressed by at least third order in the Planck scale appear consistent with observations.
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Submitted on : Thursday, August 23, 2007 - 2:16:09 PM
Last modification on : Wednesday, October 21, 2020 - 4:32:12 PM

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M. Galaverni, G. Sigl. Lorentz Violation for Photons and Ultra-High Energy Cosmic Rays. Physical Review Letters, American Physical Society, 2008, 100, pp.021102. ⟨10.1103/PhysRevLett.100.021102⟩. ⟨in2p3-00167848⟩



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