Polarization in Pseudoscalar Meson Photoproduction |
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| Authors: | Sh-Sh Hsiao Ch Ts Hung J-L Tsai Sh N Yang Y-B Dong |
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| Institution: | (1) Department of Physics, Soo-Chow University, Taipei 11102, Taiwan, TW;(2) China Institute of Technology and Commerce, Taipei 11522, Taiwan, TW;(3) Department of Physics, National Taiwan University, Taipei 10617, Taiwan, TW;(4) Institute of High Energy Physics, Academia Sinica, Beijing 100039, People's Republic of China, CN |
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| Abstract: | Two problems of current interest in the use of polarization observables for pseudoscalar meson photoproduction to probe the
basic dynamics are discussed. The first one concerns the extraction of the ratio of electric quadrupole to magnetic dipole
transition strengths in the photo-excitation of the . The predictions of various models are compared with the recent LEGS and MAMI data obtained with polarized photon beams.
The second one is a proposal by Saghai and Tabakin to use the nodal structure of spin observables to unveil underlying dynamics
in the production process. We demonstrate with the example of at photon energy that the assumption of multipole truncation, which enters into their nodal analysis, is questionable.
Received October 11, 1997; revised February 16, 1998; accepted for publication March 6, 1998 |
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