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Search for Photon-Photon Elastic Scattering in the X-ray Region

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arxiv 1403.2547 v2 pith:KVNW5PZF submitted 2014-03-11 hep-ex physics.ins-detphysics.optics

T. Inada , T. Yamaji , S. Adachi , T. Namba , S. Asai , T. Kobayashi , K. Tamasaku , Y. Tanaka
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Y. Inubushi K. Sawada M. Yabashi T. Ishikawa
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classification hep-exphysics.ins-detphysics.optics
keywords photon-photonscatteringx-rayelasticpulsessearchsystemapplying
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abstract

We report the first results of a search for real photon-photon scattering using X rays. A novel system is developed to split and collide X-ray pulses by applying interferometric techniques. A total of $6.5\times10^{5}$ pulses (each containing about $10^{11}$ photons) from an X-ray Free-Electron Laser are injected into the system. No scattered events are observed, and an upper limit of $1.7\times 10^{-24}$ ${\rm m^{2}}$ (95% C.L.) is obtained on the photon-photon elastic scattering cross section at 6.5 keV.

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