Analysis of the behavior of the pion form factor at small Q2 by the method of QCD sum rules
Nesterenko V. A. , Radyushkin A. V.
A QCD sum rule has been derived for the electromagnetic form factor of the pion in the region of a small spacelike momentum transfer, Q2Sm2p. The value found for the electromagnetic radius of the pion, (r^) 1/2 = 0.66 + 0.03 fm, agrees well with experimental data.