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The determination of the strong coupling constant $\alpha\sb s$, using Energy-Energy Correlation Asymmetry and jet mass difference with Mark II data at SLC (91 GeV) is presented.
We have studied the energy-energy correlation in ee− annihilation into hadrons at .sqrt.s = 29 GeV using the Mark II detector at PEP. We find to O(.cap alpha./sub s/2) that .cap alpha./sub s/ = 0.158 +- 003 +- 008 if hadronization is described by string fragmentation. Independent fragmentation schemes give .cap alpha./sub s/ = .10 - 14, and give poor agreement with the data. A leading-log shower fragmentation model is found to describe the data well.
A measurement of the strong coupling constant [alpha][sub s] using the event-shape variable y[sub 3] (the differential two-jet rate) in the reaction e[sup +]e[sup [minus]] [yields] hadrons is presented. The analysis is based on data from the TPC/Two-Gamma detector at the PEP e[sup +]e[sup [minus]] storage ring taken between 1984 and 1986 at a center-of-mass energy of E[sub cm] = 29 GeV. A value of [alpha][sub s](29 GeV) = 0.160 [+-] 0.012 is obtained, where the error is the quadratic sum of experimental and theoretical uncertainties. The procedure for determining [alpha][sub s] is the same as that used by the ALEPH and TOPAZ experiments, which allows for a consistent comparison of the [alpha][sub s] values obtained at different center-of-mass energies. The observed energy dependence [open-quotes]running[close-quotes] of [alpha][sub s] is found to be in good agreement with the QCD prediction, and is clearly incompatible with a constant value.
We present recent QCD results in [nu]-N scattering at the Fermilab CCFR experiment. We present the latest Next-to-Next-to-Leading order strong coupling constant, [alpha]s, extracted from Gross-Llewellyn-Smith sum rule. The value of [alpha]s from this measurement, at the mass of Z boson, is [alpha]{sup NNLO}{sub s} (M2{sub Z}) = 0:114 {sup +0 : 009}{sub -0.012} Measurements of charged current neutrino and anti-neutrino nucleon interactions in the CCFR detector are used to extract the structure functions, F2, xF{sup {nu}}3, xF{sup {anti{nu}}}3 and R(longitudinal) in the kinematic region 0:01
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