A Proposal to Measure Photon-Photon Scattering
Fujita, Takehisa · Kanda, Naohiro
Original · EN
We discuss a possibility to measure the photon-photon scattering cross section at low energy in a theoretical standpoint. The cross section of photon-photon scattering at low energy can be written as dσ dΩ ≃ α⁴ (12π)² ω² (3+2²θ+⁴θ) with ω the energy of photon. The magnitude of the cross section at ω≃ 1 eV should be 10³⁷ times larger than the prediction of Heisenberg and Euler who calculated the photon scattering by the classical picture of field theory. Due to a difficulty of the initial condition of photon-photon reaction process, we propose to first measure γ+γ→ e++e- reaction at a few MeV before measuring γ+γ→ γ+γ elastic scattering.
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