Bv. Geshkenbein et Vl. Morgunov, HADRONIC CONTRIBUTION TO THE VALUE OF THE ELECTROMAGNETIC COUPLING-CONSTANT AT Q(2)=M(2)(2), Physics letters. Section B, 340(3), 1994, pp. 185-188
A QCD model with an infinite number of vector mesons suggested by one
of the authors is used to derive the value of the correction deltaalph
a(hadr) for alpha(m(Z)2) due to the strong interactions. The result is
deltaalpha(hadr) = 0.0275(2); thus alpha(m(Z)2) = (128.96(3))-1.