1. Pacific Northwest National Laboratory, Richland, WA 99352, USA
2. Department of Physics and Astronomy, University of South Carolina, Columbia, SC 29208, USA
3. Institute for Theoretical and Experimental Physics, Moscow 117259, Russia
4. Department of Physics, California Institute of Technology, Pasadena, CA 91125, USA
5. Enrico Fermi Institute, University of Chicago, Chicago, IL 60637, USA
6. Center for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, WA 98195, USA
7. International Institute for Advanced Studies, Kizu-cho, Kyoto, 619-0025 and JASRI, SPring-8, Hyogo 679-5198, Japan
8. Emeritus, Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567, Japan
9. Dipartimento di Fisica dell' Universitá di Milano-Bicocca and Istituto Nazionale di Fisica Nucleare, Sezione di Milano, Italy
10. Department of Physics, Brown University, Providence, RI 02912, USA
11. Physics Department, Stanford University, Stanford, CA 94305, USA
12. Emeritus, Department of Physics and Astronomy, University of California, Irvine, CA 92697, USA
13. Laboratory of Nuclear and High Energy Physics, University of Zaragoza, 50009 Zaragoza, Spain
14. Department of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA
15. Department of Physics, Duke University, Durham, NC 27708, USA