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- W2020908103 abstract "We analyze the relativistic corrections to annihilation rates of S-wave quarkonia within the framework of NRQCD. We show that order υ2 corrections can be expressed in terms of the heavy quark pole mass and the quarkonium mass. The ratio of hadronic to radiative annihilation rates for ηb and ηc can therefore be predicted accurately. The contributions of color-octet operators to the hadronic decay rates of spin-triplet quarkonia are shown to be significant, even though they arise at order υ4 in the velocity expansion. We provide a rough estimate of the color-octet contributions and extract the value of αs from the experimental data on Y decays." @default.
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- W2020908103 title "Annihilation of S-wave quarkonia and the measurement of αs" @default.
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- W2020908103 doi "https://doi.org/10.1016/s0370-2693(97)00744-2" @default.
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