Testing Lorentz Invariance Violation at the Pierre Auger Observatory

Lang, Rodrigo Guedes

doi:10.22323/1.358.0327

Cited by 12 publications

(16 citation statements)

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“…The results reported in this paper can be used to compare predictions with experimental observations. In particular, one may try and compute how observables such as spectrum, composition, and secondary photon flux are expected to change at different LIV intensities, as was done in [45][46][47][52][53][54]. Moreover, since the HMSR has the peculiarity of preserving spacetime isotropy, it is particularly fit to make predictions on how UHECR anisotropy evolves with LIV in different sources scenarios, as we plan to do this in a forthcoming work.…”

Section: Discussionmentioning

confidence: 99%

Predictions of Ultra-High Energy Cosmic Ray Propagation in the Context of Homogeneously Modified Special Relativity

et al. 2020

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Ultra high energy cosmic rays (UHECRs) may interact with photon backgrounds and thus the universe is opaque to their propagation. Many Lorentz Invariance Violation (LIV) theories predict a dilation of the expected horizon from which UHECRs can arrive to Earth, in some case even making the interaction probability negligible. In this work, we investigate this effect in the context of the LIV theory that goes by the name of Homogeneously Modified Special Relativity (HMSR). In this work, making use of a specifically modified version of the SimProp simulation program in order to account for the modifications introduced by the theory to the propagation of particles, the radius of the proton opacity horizon (GZK sphere), and the attenuation length for the photopion production process are simulated and the modifications of these quantities introduced by the theory are studied.

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Section: Discussionmentioning

confidence: 99%

Predictions of Ultra-High Energy Cosmic Ray Propagation in the Context of Homogeneously Modified Special Relativity

et al. 2020

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“…The invariant action integral for a charged material particle in the electromagnetic field is made up of two parts: the action for the free particle defined by (19) and a term describing the interaction of the particle with the field. The invariance is provided by using the combinations that are invariant in the Minkowskian variables (26) so that the action integral takes the form [37]…”

Section: Electromagnetic Field Equationsmentioning

confidence: 99%

Cosmology and Cosmic Rays Propagation in the Relativity with a Preferred Frame

Burde¹

2022

Dark Matter - Recent Observations and Theoretical Advances

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In this chapter, cosmological models and the processes accompanying the propagation of the cosmic rays on cosmological scales are considered based on particle dynamics, electrodynamics and general relativity (GR) developed from the basic concepts of the ‘relativity with a preferred frame’. The ‘relativity with a preferred frame’, designed to reconcile the relativity principle with the existence of the cosmological preferred frame, incorporates the preferred frame at the fundamental level of special relativity (SR) while retaining the fundamental space-time symmetry which, in the standard SR, manifests itself as Lorentz invariance. The cosmological models based on the modified GR of the ‘relativity with a preferred frame’ allow us to explain the SNIa observational data without introducing the dark energy and also fit other observational data, in particular, the BAO data. Applying the theory to the photo pion-production and pair-production processes, accompanying the propagation of the Ultra-High Energy Cosmic Rays (UHECR) and gamma rays through the universal diffuse background radiation, shows that the modified particle dynamics, electrodynamics and GR lead to measurable signatures in the observed cosmic rays spectra which can provide an interpretation of some puzzling features found in the observational data. Other possible observational consequences of the theory, such as the birefringence of light propagating in vacuo and dispersion, are discussed.

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“…As a consequence, the existing evidence of the suppression of the flux at the highest energies [5] can be used to put a limit on LIV. In particular, LIV can be tested by searching the best description of the UHECR observables, under LIV assumptions, as already done for instance in [6][7][8][9][10]. However, the scenario is complicated by the fact that the best description of the UHECR spectrum and composition is found corresponding to values of maximum energy at the source smaller than or comparable to the typical threshold energy for photo-meson or photo-disintegration reactions [11].…”

Section: Introductionmentioning

confidence: 99%