2 papers
hep-th2026
Stable Causality and Microcausality for Drummond-Hathrell Photons
Madhukar Deb, Jay Desai, Diptimoy Ghosh
Local superluminal photon propagation arises at in the Drummond Hathrell (DH) effective action obtained by integrating out the electron in QED coupled to gra…
hep-ph2025
Positivity at 1-Loop: Bounds on Photon and Gluon EFTs
Jay Desai, Diptimoy Ghosh
In this paper, we attempt to derive ``positivity" bounds on Photon and Gluon Effective Field Theories (EFTs) at one loop level. While for the Photon case, the one loop amplitude is…