An experiment of X-ray photon-photon elastic scattering with a Laue-case beam collider
| Autor: | Yamaji, T., Inada, T., Yamazaki, T., Namba, T., Asai, S., Kobayashi, T., Tamasaku, K., Tanaka, Y., Inubushi, Y., Sawada, K., Yabashi, M., Ishikawa, T. |
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| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | Physics Letters B 763 (2016) 454 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1016/j.physletb.2016.11.003 |
| Popis: | We report a search for photon-photon elastic scattering in vacuum in the X-ray region at an energy in the center of mass system of \omega_{cms} =6.5 keV for which the QED cross section is \sigma_{QED} =2.5 \times 10^{-47} m^2. An X-ray beam provided by the SACLA X-ray Free Electron Laser is split and the two beamlets are made to collide at right angle, with a total integrated luminosity of (1.24 \pm 0.08) \times 10^{28} m^{-2}. No signal X rays from the elastic scattering that satisfy the correlation between energy and scattering angle were detected. We obtain a 95% C.L. upper limit for the scattering cross section of 1.9 \times 10^{-27} m^2 at \omega_{cms}=6.5 keV. The upper limit is the lowest upper limit obtained so far by keV experiments. Comment: 11 pages, 2 Postscript figures, 1 tables |
| Databáze: | arXiv |
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