Light by light scattering at a low energy e+e- collider -or- What to do while waiting for that rare kaon decay event
Abstract
Two photon processes are a wonderful by-product of an e+e- collider at any energy. Two photon reactions probe the very structure of matter. A machine operating below 2 GeV has the potential to reveal the Higgs sector of the strong interaction -- the scalars with vacuum quantum numbers that reflect dynamical mass generation from the breakdown of chiral symmetry. One of the many e+e- machines around the globe must have a dedicated γγ facility.
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