The Immirzi Parameter as a Cosmic Transparency Filter: Explaining the 300 TeV Photons from GRB 221009A in Chrono-Grid Dynamics

This work proposes a novel explanation for the observed transparency of the universe to ultra-high-energy (UHE) gamma rays, specifically the ∼300 TeV photons detected from GRB 221009A. Within the framework of Chrono-Grid Dynamics (CGD), a discrete and unitary model of emergent spacetime, the Immirzi parameter β is shown to play a direct phenomenological role. We argue that the discrete structure of spacetime induces a non-perturbative momentum cutoff, which modifies the kinematics of photon-photon interactions and raises the pair production threshold. This leads to an effective transparency window in the 100–300 TeV range, consistent with recent observations. A simple phenomenological scaling of the threshold energy, Eₜh ∝ 1/√β, is introduced and shown to reproduce the observed anomaly for plausible values of β. This scaling should be interpreted as a consequence of momentum saturation effects rather than a fully derived result. The model yields several testable predictions, including a redshift-dependent cutoff, a hard spectral tail in gamma-ray spectra, possible anisotropy effects, an upper bound on photon energies, and small energy-dependent time delays. This work provides a potential observational probe of the Immirzi parameter, linking a key quantity from quantum gravity to high-energy astrophysical phenomena.