English

Expected Signature For the Lorentz Invariance Violation Effects on $\gamma-\gamma$ Absorption

High Energy Astrophysical Phenomena 2023-04-19 v3

Abstract

There are still some {significant and} unanswered questions about the {incredible} {very high energy (VHE)} γ\gamma-ray signatures. To help understand the mechanism, focusing on the linear and quadratic perturbation mode for the subluminal regime, the present paper revisited the expected signature for the Lorentz invariance violation effects on γγ\gamma-\gamma absorption in TeV spectra of Gamma-ray bursts (GRBs). We note that there is {a critical energy} for the pair production process, which is sensitive to the assumed quantum gravity energy scale. We suggest that a {reemergence of the energy spectrum of γ\gamma-rays} at the several tens of TeV is a rough observational diagnostic for the Lorentz invariance violation (LIV) effects. The expected spectra characteristics are applied to a GRB 221009A. The results show that the cosmic opacity with LIV effects considered here {can} roughly reproduce the observed γ\gamma-ray spectra for the source, which enabled us to constrain the upper limit of the values of energy scale at EQG, 13.35×1020E_{\rm QG,~1}\leq3.35\times10^{20} GeV for the linear perturbation and EQG, 29.19×1012E_{\rm QG,~2}\leq9.19\times10^{12} GeV for the quadratic perturbation. {These scenarios would update the bound of the LIV coefficient with ξ13.62×102\xi_{\rm 1}^{\prime}\geq 3.62\times10^{-2} for the linear perturbation, and ξ21.33×106\xi_{\rm 2}^{\prime}\geq 1.33\times10^{6} for the quadratic perturbation in the standard model extension (SME) framework, respectively. }

Keywords

Cite

@article{arxiv.2211.01836,
  title  = {Expected Signature For the Lorentz Invariance Violation Effects on $\gamma-\gamma$ Absorption},
  author = {Y. G. Zheng and S. J. Kang and K. R. Zhu and C. Y. Yang and J. M. Bai},
  journal= {arXiv preprint arXiv:2211.01836},
  year   = {2023}
}

Comments

Accepted for publication in PRD, 8 pages, 5 figures