Lorentz invariance violation (LIV) introduced as a generic modification to particle dispersion relations can change the photon energy threshold of pair-production, which modifies the expected gamma-ray flux from astrophysical sources. In this work, we review this phenomenon and explore its consequences through the derived effects in the optical depth. Then, by looking for subluminal LIV signatures in TeV gamma-ray spectra, we present stringent limits to the LIV energy scale at leading order n=1 and 2. And finally, we present the predicted flux of GZK-photons including LIV, in the astrophysical scenario which best describes UHECR data.
|Publication status||Published - 2018|
|Event||2018 International Conference on Black Holes as Cosmic Batteries: UHECRs and Multimessenger Astronomy, BHCB 2018 - Foz do Iguacu, Brazil|
Duration: 12 Sep 2018 → 15 Sep 2018
|Conference||2018 International Conference on Black Holes as Cosmic Batteries: UHECRs and Multimessenger Astronomy, BHCB 2018|
|City||Foz do Iguacu|
|Period||12/9/18 → 15/9/18|
Bibliographical noteFunding Information:
The authors acknowledge FAPESP support numbers 2015/15897-1, 2016/24943-0 and 2017/03680-3. The authors also acknowledge the National Laboratory for Scientific Computing (LNCC/MCTI, Brazil) for providing HPC resources of the SDumont supercomputer, which have contributed to the research results reported within this paper (http://sdumont.lncc.br).
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