Photon-photon scattering: a tutorial

Details Photon-photon scattering: a tutorial Photon-photon scattering: a tutorial

2011-11-25

arxiv.org/abs/1111.6126v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, 2 figures; v2: typographical errors corrected in eqs 1, 20, and 21; ref. [23] added

Scientific paper

Long-established results for the low-energy photon-photon scattering, gamma gamma --> gamma gamma, have recently been questioned. We analyze that claim and demonstrate that it is inconsistent with experience. We demonstrate that the mistake originates from an erroneous manipulation of divergent integrals and discuss the connection with another recent claim about the Higgs decay into two photons. We show a simple way of correctly computing the low-energy gamma gamma scattering.

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