A Personal History of Cesr and Cleo: The Cornell Electron by Karl Berkelman

By Karl Berkelman

This useful publication is a old account of the Cornell Electron garage Ring and its major detector facility, CLEO, from their beginnings within the overdue 1970's until eventually the tip of information assortment at particle energies above the edge for B meson creation in June 2001. The CESR electron–positron collider was once the fruits of a sequence of electron accelerators built on the Cornell Laboratory of Nuclear experiences, beginning in 1945. size of the goods of the e+e– collisions used to be played with the multipurpose CLEO gear, outfitted and operated through the CLEO collaboration, which consisted of approximately two hundred school, employees and graduate scholars from over 20 universities. This account is predicated almost always at the author's reminiscences as a player.

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Most of us were not completely convinced that the SLC would succeed in making enough luminosity to compete favorably with LEP — and we were right. The CESR-II Blind Alley, 1980–1983 41 Now that LEP and SLC were practically launched, the prospects for NSF funding for CESR-II got even dimmer. The enthusiasm was lost. Apparently stymied in his quest for a great leap forward at Cornell, Maury Tigner looked around for another challenge. In April 1983 he convened at Cornell the workshop that launched the design work for the Superconducting Super Collider, and in 1984 he left Cornell to head the SSC Central Design Group at Berkeley.

To get the best momentum resolution the solenoid coil would have to be big and expensive, and the other detector elements, particle identification, shower counters and muon detectors, would have to be even larger. To keep costs down, all but the tracking chambers would have to be outside the solenoid coil, and we would have to contend with the interactions of the particles as they passed through the coil. And because of their size, the outer detector elements would have to be made using low-tech, cheap technology.

6 ps lifetime for the B meson, long enough for a B with modest kinetic energy to have a measurable decay distance, and long enough for the B 0 to oscillate to its B 0 antiparticle. 004 — a very small but nonzero matrix element. Because Vub is so small, the rates for charmless decays of B mesons are sensitive to higher order weak processes and possibly to new physics beyond the Standard Model. It is the fact that Vub is nonzero that allows for the Kobayashi–Maskawa mechanism of CP violation in weak decays.

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