Di-electron Widths of the Upsilon(1S,2S,3S) Resonances
High Energy Physics - Experiment
2010-04-08 v4
Abstract
We determine the di-electron widths of the Upsilon(1S), Upsilon(2S), and Upsilon(3S) resonances with better than 2% precision by integrating the cross-section of e+e- -> Upsilon over the e+e- center-of-mass energy. Using e+e- energy scans of the Upsilon resonances at the Cornell Electron Storage Ring and measuring Upsilon production with the CLEO detector, we find di-electron widths of 1.354 +- 0.004 (stat) +- 0.020 (syst) keV, 0.619 +- 0.004 +- 0.010 keV, and 0.446 +- 0.004 +- 0.007 keV for the Upsilon(1S), Upsilon(2S), and Upsilon(3S), respectively.
Keywords
Cite
@article{arxiv.hep-ex/0512056,
title = {Di-electron Widths of the Upsilon(1S,2S,3S) Resonances},
author = {CLEO Collaboration and J. L. Rosner},
journal= {arXiv preprint arXiv:hep-ex/0512056},
year = {2010}
}
Comments
9 pages, 4 figures, also available through http://www.lns.cornell.edu/public/CLNS/2005/, published in PRL; corrected numerical values in abstract