FIZIKA B 8 (1999) 2, 327-334

ON THE COMPLETE NEXT-TO-LEADING ORDER pQCD PREDICTION FOR THE PION FORM FACTOR

BLAŽENKA MELIĆ, BENE NIŽIĆ and KORNELIJA PASSEK

Theoretical Physics Division, Ruđer Bošković Institute, P.O. Box 1016, 10001 Zagreb, Croatia
Electronic addresses: [email protected], [email protected], [email protected]

Received 11 January 1999; Accepted 7 June 1999

We comment on the results of a complete leading-twist next-to-leading order QCD analysis of the spacelike pion electromagnetic form factor at large-momentum transfer Q. For the asymptotic distribution amplitude, we have examined the sensitivity of the predictions to the choice of the renormalization scale. The results show that reliable perturbative predictions for the pion electromagnetic form factor can already be made at a momentum transfer Q below 10 GeV.

PACS numbers: 13.40.Gp, 12.38.Bx
UDC 539.126

Keywords: exclusive processes, perturbative QCD, next-to-leading order, pion form factor, distribution amplitudes, renormalization and factorization scales

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