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dc.contributor.authorPivarski, James
dc.identifier.citationJ.L. Rosner et al. (CLEO Collaboration), Phys. Rev. Lett. 96, 092003 (2006en_US
dc.identifier.otherbibid: 6475828
dc.description.abstractThe di-electron width of an Upsilon meson is the decay rate of the Upsilon into an electron-positron pair, expressed in units of energy. We measure the di-electron width of the Upsilon(1S) meson to be 1.354 +- 0.004 +- 0.020 keV (the first uncertainty is statistical and the second is systematic), the di-electron width of the Upsilon(2S) to be 0.619 +- 0.004 +- 0.010 keV and that of the Upsilon(3S) to be 0.446 +- 0.004 +- 0.007 keV. We determine these values with better than 2% precision by integrating the Upsilon production cross-section from electron-positron collisions over their collision energy. Our incident electrons and positrons were accelerated and collided in the Cornell Electron Storage Ring, and the Upsilon decay products were observed by the CLEO-III detector. The di-electron widths probe the wavefunctions of the Strongly-interacting bottom quarks that constitute the three Upsilon mesons, information which is especially interesting to check high-precision Lattice QCD calculations of the nuclear Strong force.en_US
dc.description.sponsorshipThis work was supported by the A.P. Sloan Foundation, the National Science Foundation, and the U.S. Department of Energy.en_US
dc.format.extent3087467 bytes
dc.publisherPhysical Review Lettersen_US
dc.subjectparticle physicsen_US
dc.subjectdi-electron widthen_US
dc.subjectdecay rateen_US
dc.subjectnon-perturbative QCDen_US
dc.subjectStrong nuclearen_US
dc.subjectCornell potentialen_US
dc.subjectbottom quarken_US
dc.subjectbeauty quarken_US
dc.subjectunquenched Lattice QCDen_US
dc.titleA High-Precision Measurement of the Di-Electron Widths of the Upsilon(1S), Upsilon(2S), and Upsilon(3S) Mesons at CLEO-IIIen_US
dc.typedissertation or thesisen_US

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