6 v 2 2 9 A pr 1 99 7 Review of α s measurements at LEP
نویسندگان
چکیده
Since 1995, LEP has steadily increased the center of mass energy of the colliding beams, from the M Z resonance to 133, 161 and 172 GeV. New measurements of the strong coupling constant, α s , at these energies have been performed by the LEP experiments, L3, ALEPH, OPAL and DELPHI. In this article, the new results are summarized, and combined with the previous LEP measurement of α s (M Z) in order to obtain an updated LEP average of α s (M Z) = 0.120 ± 0.005.
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