The more precise determination of hadronic contribution to muonic (g-2) factor and to alpha(M^2_z)
mag(2003)
摘要
The hadronic vacuum-polarization contribution to the muon anomalous magnetic
moment a_{mu}(hadr) and to the value of the eleectromagnetic coupling constant
at q^2 = M^2_z are determined more precisely in connection with a new more
exact value of the electronic width of rho-meson. The QCD model with infinite
number of vector mesons is used. The more precisely determined results are:
a_{mu}(hadr) = 678(7)*10^{-10}, \delta\alpha_{hadr}(M^2_z) = 0.02786(6).
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关键词
coupling constant,anomalous magnetic moment,high energy physics
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