Regular Article - Theoretical Physics
Light-by-light scattering at future colliders
Theoretical Particle Physics and Cosmology Group, Physics Department, King’s College London, WC2R 2LS, London, UK
2 National Institute of Chemical Physics and Biophysics, Rävala 10, 10143, Tallinn, Estonia
3 Theoretical Physics Department, CERN, CH1211, Geneva 23, Switzerland
4 Physics Department, School of Applied Mathematical and Natural Sciences, National Technical University of Athens, Zografou Campus, 157 80, Athens, Greece
5 Experimental Physics Department, CERN, CH1211, Geneva 23, Switzerland
6 DAMTP, University of Cambridge, Wilberforce Road, CB3 0WA, Cambridge, UK
7 Cavendish Laboratory, University of Cambridge, J.J. Thomson Avenue, CB3 0HE, Cambridge, UK
Accepted: 22 June 2022
Published online: 23 July 2022
We study the sensitivity of possible CLIC and FCC-ee measurements of light-by-light scattering to old and new physics, including the Heisenberg–Euler Lagrangian in the Standard Model with possible contributions from loops of additional charged particles or magnetic monopoles, the Born–Infeld extension of QED, and effective dimension-8 operators involving four electromagnetic field strengths as could appear in the Standard Model Effective Field Theory. We find that FCC-ee measurements at 365 GeV and CLIC measurements at 350 GeV would be sensitive to new physics scales of half a TeV in the dimension-8 operator coefficients, and that CLIC measurements at 1.4 TeV or 3 TeV would be sensitive to new physics scales TeV or 5 TeV at 95% CL, corresponding to probing loops of new particles with masses up to TeV for large charges and/or multiple species. Within Born–Infeld theory, the CL sensitivities would range from GeV to 1.3 or 2.8 TeV for the high-energy CLIC options. Measurements of light-by-light scattering would not exclude monopole production at FCC-hh, except in the context of Born–Infeld theory.
© The Author(s) 2022
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
Funded by SCOAP3