Masses of nS-wave Heavy Quarkonium Levels from QCD Sum Rules
Kiselev, V. V.
Original · EN
Using a specific scheme of the QCD sum rules, one derives an universal formula for the mass differences for the nS-levels of heavy qiarkonium. This relation does not depend on the flavours of the heavy quarks, composing the quarkonium, and it is in a good agreement with the experimental mass values for the ψ- and Υ-families.
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