QCD at lowQ 2—A correspondence relation for moments of structure functions
Tóm tắt
The precocious validity of QCD predictions in deep inelastic lepton nucleon scattering ande
+
e
− annihilation is interpreted as a signal for an underlying “correspondence principle” relating perturbative and nonperturbative physics on theQ
2 average. Correspondence relations for nonsinglet moments of deep inelastic structure functions are formulated, discussed and successfully tested against experiment. The relations provide an independent determination of the QCD ⋏-parameter from lowQ
2 data in perfect agreement with results from largeQ
2 analyses.
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