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Press Release

Lauren Ward

For immediate release:
May 17, 2005

Carnegie Mellon University High-Energy Particle Physicist Selected Co-Spokesperson of the CLEO Collaboration

PITTSBURGH—Roy Briere, associate professor of physics at Carnegie Mellon University's Mellon College of Science, has been elected one of two co-spokespersons for the CLEO collaboration. A group of about 140 scientists from 22 universities, CLEO uses an accelerator at Cornell University to conduct high-energy particle physics experiments to understand the forces of nature and the fundamental structure of matter. Briere will begin his one-year term on July 1.

Along with Edward H. Thorndike, professor of physics at the University of Rochester, Briere will influence the direction of research at the laboratory, help determine the allocation of running time for the current experiment and the sharing of resources, and represent the collaboration in interactions with other institutions and its two major funding agencies, the National Science Foundation and the U.S. Department of Energy.

"We are very pleased to see Roy selected as co-spokesperson. He is a great motivator and has an infectious enthusiasm for physics. He is highly respected for his knowledge and expertise, and for his ability to communicate with experts and non-experts alike," said Helmut Vogel, professor of physics at Carnegie Mellon and a member of the CLEO collaboration.

"CLEO has a great tradition in both the quality of physics and the style of collaboration," Briere said. "We've found a new niche that's an important part of the overall high-energy program, and I'm looking forward to a productive year with Ed and the collaboration."

For more than 20 years, the CLEO collaboration has been a major player in B physics, a field that seeks evidence to explain differences between matter and antimatter by studying B mesons, particles that contain either a beauty quark or a beauty antiquark. The advent of two "B factories" at Stanford University and at the Japanese National Accelerator Center several years ago prompted the CLEO group to begin concentrating on the physics of charm quarks. By working in the charm sector, the CLEO physicists can make very precise measurements that will be used to test new theoretical calculations. After verifying these theoretical techniques, physicists can use them with confidence in other cases in which such experimental checks are not possible.

The Mellon College of Science at Carnegie Mellon maintains innovative research and educational programs in biological sciences, chemistry, physics, mathematics and several interdisciplinary areas. For more information, visit


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