New stringent LIV limits from astrophysical gamma-ray sources

Rodrigo Guedes Lang, Humberto Martínez-Huerta, Vitor de Souza*

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review


Lorentz invariance violation (LIV) introduced as a generic modification to particle dispersion relation can change the photon energy threshold of pair-production, which modifies the extragalactic background light (EBL) absorption of gamma rays from astrophysical sources. In this note, we report an innovative data analysis that allows us to extract unprecedented information from the most updated data set composed of 111 energy spectra of 38 different sources measured by current gamma-ray observatories. The outcome technique and results maximize the chances to find or discriminate LIV signals in any future search and reduce the biases in current analyses. Therefore, we report stringent limits for the LIV energy scale at first and second leading order in high energy gamma-rays. These limits are better than the ones current available in the literature for subluminal searches of LIV, irrespectively of many tested uncertainties, such as, poor knowledge of the EBL, large uncertainties in the intrinsic energy spectra functional form, energy resolution, selection of spectra and the energy bins selection used in the calculation of the intrinsic energy spectra.

Original languageEnglish
Article number658
JournalProceedings of Science
Publication statusPublished - 2 Jul 2021
Externally publishedYes
Event36th International Cosmic Ray Conference, ICRC 2019 - Madison, United States
Duration: 24 Jul 20191 Aug 2019

Bibliographical note

Publisher Copyright:
© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0)

All Science Journal Classification (ASJC) codes

  • General


Dive into the research topics of 'New stringent LIV limits from astrophysical gamma-ray sources'. Together they form a unique fingerprint.

Cite this