In everyday research, it is tacitly assumed that scattering cross sections have fixed values for a given particle species, center-of-mass energy, and particle polarization. However, this assumption has been called into question after several observations of apparent suppression of high-energy bremsstrahlung - the origin of which will be explained in this talk, also in relation of this elusive effect to other quantum phenomena occurring over macroscopic distances. Bremsstrahlung, or small-angle radiative Bhabha scattering, plays a major role in experiments at the present and future colliders, as SuperKEKB, Electron-Ion Collider [1], or FCC-ee [2], respectively. That will be overviewed and be followed by discussion of a novel proposal to profoundly study these long range effects. Finally, also possible astrophysical consquences will be shortly considered.
[1] Phys. Rev. D 103, L051901 (2021) https://journals.aps.org/prd/abstract/10.1103/PhysRevD.103.L051901
[2] Eur. Phys. J. C 83 (2023) https://link.springer.com/article/10.1140/epjc/s10052-023-11981-2
