| APPEAL > APPEAL Seminar |
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The 12th APPEAL Seminar
APPEAL 12-04 |
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| Date and Time: | 11:30 - 12:30, September 8th, 2004. |
| Place: | Seminar room B, Main building 3F, SPring-8 |
| Speaker: | Dr. Tsutomu Mibe (Ohio University, USA) |
| Title: | Phi-meson photoproduction, New results from LEPS/SPring-8 |
| Abstract: | Phi-meson photoproduction near the threshold with linearly-polarized photons provides information on a possible exotic production mechanism such as the glue-ball exchange process. A measurement of differential cross sections and decay angular distributions for the phi-meson photoproduction on protons has been carried out near the threshold at BL33LEP of SPring-8(LEPS). In this talk, new results on the differential cross sections and the decay angular distributions will be shown. The differential cross sections as a function of the beam energy shows a peaking structure which is incompatible with the model calculation based on the Pomeron exchange and pseudo scalar exchange processes. I will discuss a possible interpretation of the results in connection with forthcoming results from new data with a deuteron target and experiments with higher beam energy. |
| Contact: | Prof. Hiro Ejiri. SPring-8/IIAS/RCNP E-mail: ejiri@spring8.or.jp |