Search for Lorentz invariance violation using Bayesian model comparison applied to Xiao et al. GRB spectral lag catalog

Shantanu Desai; Rajdeep Agrawal; Haveesh Singirikonda

doi:10.1140/epjc/s10052-023-11229-z

2022 Impact factor 4.4

Particles and Fields

Open Access

Eur. Phys. J. C (2023) 83: 63
https://doi.org/10.1140/epjc/s10052-023-11229-z

Regular Article - Experimental Physics

Search for Lorentz invariance violation using Bayesian model comparison applied to Xiao et al. GRB spectral lag catalog

Shantanu Desai¹^a, Rajdeep Agrawal¹ and Haveesh Singirikonda²

¹ Department of Physics, Indian Institute of Technology, 502285, Hyderabad, Telangana, India
² Argelander-Institut für Astronomie, Auf dem Hügel 71, 53121, Bonn, Germany

^a shntn05@gmail.com

Received: 26 October 2022
Accepted: 17 January 2023
Published online: 23 January 2023

Abstract

We use the spectral lag catalog of 46 short GRBs aggregated by Xiao et al. (Astrophys J Lett 924:L29, 2022), to carry out an independent search for Lorentz invariance violation (LIV). For this purpose, we use a power-law model as a function of energy for the intrinsic astrophysical induced spectral lags. The expansion history of the universe needed for constraining LIV was obtained in a non-parametric method using cosmic chronometers. We use Bayesian model comparison to determine if the aforementioned spectral lags show evidence for LIV as compared to only astrophysically induced lags. We do not find any evidence for LIV, and obtain 95% CL lower limits on the corresponding energy scale to be GeV and GeV for the linear and quadratic LIV models respectively. Our results obtained by using the flat CDM model for characterizing the cosmic expansion history are consistent with those obtained using chronometers.

© The Author(s) 2023

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