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Light-by-light scattering at future e+e- colliders
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DOI：10.1140/epjc/s10052-022-10565-w.png)
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摘要
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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 similar to 2 TeV or 5 TeV at 95% CL, corresponding to probing loops of new particles with masses up to similar to 3.7 TeV for large charges and/or multiple species. Within Born-Infeld theory, the 95% CL sensitivities would range from similar to 300 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.
Keyword:
PHOTON-PHOTON SCATTERING
期刊
IF:
4.8
论文数:
1.8W
被引数:
4.7W
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