Sum-rule for large-Nc QCD and application to heavy quarkonia
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CitationLee, Dean, and Howard Georgi. 1998. “Sum-Rule for Large-Nc QCD and Application to Heavy Quarkonia.” Physics Letters B 426 (3–4): 367–74. https://doi.org/10.1016/s0370-2693(98)00287-1.
AbstractWe introduce a sum-rule for large-N-c QCD which relates the density of heavy quarkonium states, the state-averaged square of the wavefunction at the origin, and the heavy quark current-current correlator. Focusing on the region of energy just above perturbative threshold, we calculate the correlator by incorporating arbitrarily high orders in the QCD coupling alpha(s). We use the sum-rule to determine the bottomonium potential using experimentally measured s-wave leptonic widths and compare the result with the potential obtained by direct calculation from the measured s-wave spectrum. We discuss the utility of the sum-rule method for accurate determination of the confining potential.
Citable link to this pagehttp://nrs.harvard.edu/urn-3:HUL.InstRepos:41467472
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