First Measurements of Exclusive Hadronic Decays of Upsilon(1S) and Upsilon(2S)
S. Dobbs, Z. Metreveli, A. Tomaradze, T. Xiao, Kamal K. Seth
TL;DR
This paper reports the first measurements of exclusive hadronic decay modes of Upsilon(1S) and Upsilon(2S) resonances into various light hadron final states, providing new data on their decay patterns.
Contribution
It presents the first experimental measurements of branching fractions for numerous exclusive decay modes of Upsilon(1S) and Upsilon(2S) into light hadrons.
Findings
73 decay modes of Upsilon(1S) have significant branching fractions.
17 decay modes of Upsilon(2S) have significant branching fractions.
Branching fractions range from 0.3x10^-5 to 110x10^-5.
Abstract
Using data taken with the CLEO III detector, 1.09 fb-1 at Upsilon(1S), and 1.28 fb-1 at Upsilon(2S), branching fractions have been measured for the first time for exclusive decays of each resonance into one hundred different final states consisting of 4 to 10 light hadrons, pions, kaons, and protons. Significant strength is found in 73 decay modes of Upsilon(1S) and 17 decay modes of Upsilon(2S), with branching fractions ranging from 0.3x10^-5 to 110x10^-5. Upper limits at 90% confidence level are presented for the other decay modes.
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