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CLEO collaboration submits 500th paper


The CLEO collaboration has recently submitted its 500th publication to a peer-reviewed journal. This is the largest number of papers of any collaboration in the history of elementary particle physics.

CLEO papers have garnered more than 23,000 citations (as compiled by the SPIRES high energy physics database), and there have been countless uses of CLEO measurements tabulated in the Particle Data Group's "Review of Particle Physics."

CLEO has investigated the production and decay of the heavy bottom and charm quarks, filling in many of the details of the Standard Model of particle physics. The experiment ran from late 1979 until early 2008 at the electron-positron collider CESR at Cornell University. The University of Minnesota has been part of the project since 1988, when Professor Ron Poling, one of the original CLEO collaborators, joined our faculty. He and Professors Dan Cronin-Hennessy, Yuichi Kubota, and Jon Urheim (now at Indiana University) have supervised 15 University of Minnesota graduate students on CLEO Ph.D. projects.

The 500th CLEO paper is titled "Improved Measurements of Semileptonic Decays of D Mesons to pi and K Mesons," and will be published in Physical Review D. It describes precise measurements that are key to understanding fundamental parameters in elementary particle theory. Although this research at CLEO is now complete, Cronin-Hennessy and Poling are pursuing these Standard Model tests to even greater precision with the BESIII experiment in Beijing, China.

Experiments like CLEO and BESIII are an important complement to investigations of the high-energy frontier at the Fermilab Tevatron and, soon, the LHC. For example, CLEO measurements have provided precision information that helps give confidence that the Higgs boson will be found and that it will be within the energy reach of the LHC. Similarly, studies of mixing and measurements of CP violation in quark decays that were begun by CLEO are the prototype for investigations of neutrino oscillations with the MINOS and NOvA experiments. In addition to CLEO and BESIII, the University of Minnesota high energy physics group plays leading roles in MINOS, NOvA and the CMS experiment at the LHC. No one knows where the next great discoveries will emerge, but these projects provide the best hope for major progress in unraveling deep mysteries in the nature of matter and the universe.