Determination of the Electronic Widths of the Upsilon Resonances

Details Determination of the Electronic Widths of the Upsilon Resonances Determination of the Electronic Widths of the Upsilon Resonances

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..apru15006p&link_type=abstract

American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As

Astronomy and Astrophysics

Astrophysics

Scientific paper

CESR is scanning the Υ (1S), Υ (2S) and Υ (3S) resonances. From the scan data, observed in the CLEO detector, we will determine the energy-integrated hadronic cross section of each peak, which is proportional to the electronic width of the resonance. The data samples, about 100 pb-1 at each peak, are a factor of 10 to 50 times larger than those of previous scans and should lead to precisions on the electronic widths of a few percent. These measurements offer a precise check of lattice QCD calculations.

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