Update of the electromagnetic effective coupling constant $α(M^2_Z)$

Details Update of the electromagnetic effective coupling constant $α(M^2_Z)$ Update of the electromagnetic effective coupling constant $α(M^2_Z)$

1997-11-18

arxiv.org/abs/hep-ph/9711367v1

Nuovo Cim.A111:217-222,1998

Physics

High Energy Physics

High Energy Physics - Phenomenology

Latex, 9 pages

Scientific paper

We recalculate the hadronic contribution to the effective electromagnetic
coupling constant $\alpha(M^2_Z)$ using quasi-analytical approximations for the
cross-section of $e^{+}e^{-} \to hadrons$ proposed earlier by one of the
authors(N.V.K.,Mod.Phys.Lett.A9(1994)2825). We find that $\alpha^{-1}(M^2_Z) =
128.98 \pm 0.06$.

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