LHAASO discovery of highest-energy photons towards new physics

TL;DR

The paper reports the detection of ultrahigh-energy photons up to 1.4 PeV by a new telescope, suggesting potential Lorentz invariance violation at the Planck scale.

Contribution

First observation of such high-energy photons with implications for testing fundamental physics theories.

Findings

Detection of photons up to 1.4 PeV

Potential evidence for Lorentz invariance breakdown

Advancement in ultrahigh-energy cosmic-ray observation

Abstract

Ultrahigh-energy photons up to 1.4 peta-electronvolts have been observed by new cosmic-ray telescope in China -- a hint that Lorentz invariance might break down at the Planck-scale level.