Tuesday, March 12, 2013

1303.2262 (Antonio Pich)

Review of alpha_s determinations    [PDF]

Antonio Pich
The present knowledge on the strong coupling is briefly summarized. The most precise determinations of alpha_s, at different energies, are reviewed and compared at the Z mass scale, using the predicted QCD running. The impressive agreement achieved between experimental measurements and theoretical predictions constitutes a beautiful and very significant test of Asymptotic Freedom, establishing QCD as the fundamental theory of the strong interaction. The world average value of the strong coupling is found to be alpha_s(M_Z^2)= 0.1186 \pm 0.0007.
View original: http://arxiv.org/abs/1303.2262

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