Probing for Lorentz Invariance Violation in Pantheon Plus Dominated Cosmology

Understand

The Hubble tension in cosmology is not showing signs of alleviation and thus, it is important to look for alternative approaches to it.

• One such example would be the eventual detection of a time delay between simultaneously emitted high-energy and low-energy photons in gamma-ray bursts (GRB).
• This would signal a possible Lorentz Invariance Violation (LIV) and in the case of non-zero quantum gravity time delay, it can be used to study cosmology as well.
• In this work, we use various astrophysical datasets (BAO, Pantheon Plus and the CMB distance priors), combined with two GRB time delay datasets with their respective models for the {\em {intrinsic time delay}}.