NAOMI BARASH-SCHMIDT^*, ANGELA BARBARO-GALTIERI, LEROY R. PRICE, ARTHUR H. ROSENFELD, PAUL SÖDING^†, and CHARLES G. WOHL^‡

• Lawrence Radiation Laboratory, University of California, Berkeley, California

MATTS ROOS

• CERN, Geneva, Switzerland

GIANNI CONFORTO^§

• The Enrico Fermi Institute and Department of Physics, The University of Chicago, Chicago, Illinois

• ^*Now at Brandeis University, Waltham, Mass.
• ^†Permanent address: DESY, Hamburg, Germany.
• ^‡Work done under auspices of the U.S. Atomic Energy Commission.
• ^§Work supported in part by National Science Foundation Grant GU-2175 and Grant GP-9093.