4 papers
Remarks on atmospheric effect of D-foam in light of muon puzzle
Chengyi Li
In our recent paper~[1], we used a stringy model for quantum space-time foam to suggest that the so-induced subluminal Lorentz violation~(LV) for photons would not lead to experime…
Constraints to Lorentz violation and ultrahigh-energy electrons in D-foamy space-times
Chengyi Li, Bo-Qiang Ma
We entertain the constraints that the absence of vacuum Cherenkov radiation of ultrahigh-energy electrons inferred from LHAASO observations of the Crab Nebula can impose on generic…
Shower formation in the presence of a string-inspired foam in space-time
Chengyi Li
It was recently proposed that predictions of Lorentz-breaking space-time foam models from string theory may be compatible with the suggestion of light-speed variation from gamma-ra…
Probes for String-Inspired Foam, Lorentz, and CPT Violations in Astrophysics
Chengyi Li, Bo-Qiang Ma
Lorentz invariance is such a basic principle in fundamental physics that it must be constantly tested and that any proposal of its violation and breakdown of CPT symmetry, that mig…