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000425565 0247_ $$2DOI$$a10.1007/s100520050015
000425565 035__ $$9SLAC$$a4306783
000425565 035__ $$9SPIRES$$a4306783
000425565 035__ $$9Inspire$$a513476
000425565 037__ $$9arXiv$$ahep-ex/0002012$$chep-ex
000425565 037__ $$aCERN-EP-99-178
000425565 041__ $$aeng
000425565 084__ $$2CERN Library$$aEP-1999-178
000425565 088__ $$90002012
000425565 088__ $$aCERN-EP-99-178
000425565 100__ $$aAbbiendi, G.
000425565 245__ $$aQCD studies with $e^{+}e^{-}$ annihilation data at 172-189 GeV
000425565 246__ $$9arXiv$$aQCD studies with e+ e- annihilation data at 172-GeV to 189-GeV.
000425565 260__ $$c2000
000425565 269__ $$aGeneva$$bCERN$$c3 Feb 2000
000425565 300__ $$a49 p
000425565 340__ $$apaper
000425565 500__ $$aRevised Feb 2000
000425565 500__ $$9Inspire$$aRevised Feb 2000
000425565 500__ $$9arXiv$$a49 pages, 13 figures, submitted to Eur. Phys. J. C Report-no: CERN-EP/99-178
000425565 520__ $$aWe have studied hadronic events from e+e- annihilation data at centre-of-mass energies of sqrt{s}=172, 183 and 189 GeV. The total integrated luminosity of the three samples, measured with the OPAL detector, corresponds to 250 pb^-1. We present distributions of event shape variables, charged particle multiplicity and momentum, measured separately in the three data samples. From these we extract measurements of the strong coupling alpha_s, the mean charged particle multiplicity <nch> and the peak position xi_0 in the xi_p=ln(1/x_p) distribution. In general the data are described well by analytic QCD calculations and Monte Carlo models. Our measured values of alpha_s, <nch> and xi_0 are consistent with previous determinations at sqrt{s}=MZ.
000425565 520__ $$9HEPDATA$$hCERN-LEP. Measurement of distributions of event shape variables, charged particle multiplicity and momentum distribution in E+ E- annihilation hadronic events at c.m. energies 172, 183 and 189 GeV. The data correspond to an integrated luminosity of 250 pb-1.
000425565 520__ $$9arXiv$$aWe have studied hadronic events from e+e- annihilation data at centre-of-mass energies of sqrt{s}=172, 183 and 189 GeV. The total integrated luminosity of the three samples, measured with the OPAL detector, corresponds to 250 pb^-1. We present distributions of event shape variables, charged particle multiplicity and momentum, measured separately in the three data samples. From these we extract measurements of the strong coupling alpha_s, the mean charged particle multiplicity <nch> and the peak position xi_0 in the xi_p=ln(1/x_p) distribution. In general the data are described well by analytic QCD calculations and Monte Carlo models. Our measured values of alpha_s, <nch> and xi_0 are consistent with previous determinations at sqrt{s}=MZ.
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000425565 65017 $$2SzGeCERN$$aParticle Physics - Experiment
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000425565 695__ $$9LANL EDS$$aHigh Energy Physics - Experiment
000425565 700__ $$aAckerstaff, K.
000425565 700__ $$aAkesson, P.F.
000425565 700__ $$aAlexander, G.
000425565 700__ $$aAllison, John
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000425565 700__ $$aAsai, S.
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000425565 700__ $$aAzuelos, G.
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000425565 700__ $$aBall, A.H.
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000425565 700__ $$aBarlow, Roger J.
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000425565 700__ $$aBehnke, T.
000425565 700__ $$aBell, Kenneth Watson
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000425565 700__ $$aBellerive, A.
000425565 700__ $$aBentvelsen, S.
000425565 700__ $$aBethke, S.
000425565 700__ $$aBiebel, O.
000425565 700__ $$aBiguzzi, A.
000425565 700__ $$aBloodworth, I.J.
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000425565 700__ $$aCammin, J.
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000425565 700__ $$aHemingway, R.J.
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000425565 700__ $$aImrie, D.C.
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000425565 859__ [email protected]
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