2017/03/31 by John Ellis, Nick E. Mavromatos, Tevong You · 1 citation
Physics and Astronomy · #hep-ph #hep-ex #hep-th #nucl-ex #physics.optics
paper · pdf · doi:10.1103/physrevlett.118.261802
published as Phys. Rev. Lett. 118, 261802 (2017) · 11 pages, 4 figures, version accepted for publication in PRL
arxiv created 2017/05/24 · arxiv updated 2017/07/05
The recent measurement by ATLAS of light-by-light scattering in LHC Pb-Pb collisions is the first direct evidence for this basic process. We find that it requires the mass scale of a nonlinear Born-Infeld extension of QED to be \gtrsim 100~GeV, a much stronger constraint than those derived previously. In the case of a Born-Infeld extension of the Standard Model in which the U(1)\rm Y hypercharge gauge symmetry is realized nonlinearly, the limit on the corresponding mass scale is \gtrsim 90~GeV, which in turn imposes a lower limit of \gtrsim 11~TeV on the magnetic monopole mass in such a U(1)\rm Y Born-Infeld theory.