A study of energy-energy correlations and measurement of {alpha}{sub s} at the Z{sup 0} resonance
We present the energy-energy correlation (EEC) distribution and its asymmetry (AEEC) in hadronic decays of {Zeta}{sup 0} bosons measured by the SLD at SLAC. The data are found to be in good agreement with the predictions of perturbative QCD and fragmentation Monte Carlo models of hadron production. After correction for hadronization effects the data are compared with {Omicron}({alpha}{sub s}{sup 2}) perturbative QCD calculations from various authors. Fits to the central region of the EEC yield substantially different values of the QCD scale {lambda}{sub {ovr MS}} for each of the QCD calculations. There is also a sizeable dependence of the fitted {lambda}{sub {ovr MS}} value on the QCD renormalization scale factor, f. Our preliminary results are {alpha}{sub s}(M {sub Z}) = 0.121 {plus_minus} 0.002(stat.) {plus_minus} 0.004(exp.sys.) {sub {minus}0.009}{sup +0.016} (theor.) for EEC and {alpha}{sub s}(M{sub Z}) = 0.108 {plus_minus} 0.003(stat.) {plus_minus} 0.005(exp.sys.){sub {minus}0.003}{sup +0.008}(theor.) for AEEC. The largest contribution to the error arises from the theoretical uncertainty in choosing the QCD renormalization scale.
- Research Organization:
- Tennessee Univ., Knoxville, TN (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG05-91ER40627
- OSTI ID:
- 10120761
- Report Number(s):
- CONF-920837-38; ON: DE93005894; IN: SLD Physics Note No. 013
- Resource Relation:
- Conference: ICHEP-26: 26th International Union of Pure and Applied Physics (IUPAP) conference on high energy physics,Dallas, TX (United States),6-12 Aug 1992; Other Information: PBD: [1992]
- Country of Publication:
- United States
- Language:
- English
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