https://arxiv.org/abs/hep-ph/0504251
Abstract page for arXiv paper hep-ph/0504251: Dimensionally regularized one-loop tensor-integrals with massless internal particles
hepphonelooptensor
https://www.popularmechanics.com/science/energy/a66087807/scientists-summon-massless-demon-particle/
Sep 14, 2025 - Scientists found Pine’s Demon, a massless, neutral plasmon, in strontium ruthenate, offering insights into high-temperature superconductors and quantum...
scientistssummonedmasslessdemonparticle