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Dielectron widths of the Upsilon(1S,2S,3S) resonances

Besson, David Zeke
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Abstract
We determine the dielectron 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 dielectron widths of 1.252 +/- 0.004(sigma(stat))+/- 0.019(sigma(syst)) keV, 0.581 +/- 0.004 +/- 0.009 keV, and 0.413 +/- 0.004 +/- 0.006 keV for the Upsilon(1S), Upsilon(2S), and Upsilon(3S), respectively.
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2006-03
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AMERICAN PHYSICAL SOC
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Physics & Astronomy Scholarly Works
Center for Russian, East European, and Eurasian Studies Scholarly Publications
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Rosner, JL, Adam, NE, et al. Dielectron widths of the Upsilon(1S,2S,3S) resonances. PHYSICAL REVIEW LETTERS. March 2006. 96(9)
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https://hdl.handle.net/1808/1451
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