Study of the structure of hadronic events and determination of αS at [formula omitted

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,G J Bobbink ,T E Coan ,U Becker ,F Becattini ,S Röhner ,J.-P Ernenwein ,P Garcı́a-Abia ,A J.w Van Mil ,A Weber ,Yu Galaktionov ,B Stoyanov ,A Straessner ,K Hangarter ,A Bujak ,A Dominguez ,A Kirkby ,S Sarkar ,C Dionisi ,L Ludovici ,G M Chen ,K Lübelsmeyer ,Y F Wang ,M Cerrada ,I C Brock ,N Shivarov ,G J Zhou ,M N Kienzle‐Focacci ,S Easo ,M Choi ,H S Chen ,K Riles ,J D Swaint ,C Lapoint ,M Meschini ,D Van Dierendonck ,R Raghavan ,R Castello ,N Gheordanescu ,B Monteleoni ,J Kirkby ,L Gutay ,Michel Fabre ,H Postema ,E González ,S N Ganguli ,S Rosier‐Lees ,B C Riemers ,B Zhou ,G Landi ,V Innocente ,J Alcaraz ,M Gailloud ,C Y Chien ,Z Zhang ,R Leiste ,D Pandoulas ,R Battiston ,G Chiefari ,Samuel C.c Ting ,A Degré ,P H Fisher ,F Filthaut ,R Mount ,A Nippe ,G Carlino ,Giovanni Romeo ,W Lu ,J Salicio ,M Chamizo ,D Bourilkov ,C Li ,S R Ro ,О Адриани ,H Hofer ,B Schoeneich ,S Shevchenko ,P Laurikainen ,J Mnich ,I Vorobiev ,R De Asmundis ,P.g Rancoita ,I Josa-Mutuberria ,S Falciano ,R Fabbretti ,P Ladrón De Guevara ,F Muheim ,H Janßen ,A Favara ,S C Kim ,L Taylor ,F Wittgenstein ,F J Eppling ,M Rattaggi ,R R Mcneil ,Virendra K Gupta ,E Fiandrini ,P Lecoq ,H Schopper ,E Drago ,P Extermann ,F J Rodríguez ,R De Jong ,Sachin Kumar Mangla ,D J Schotanus ,D Duchesneau ,C G Yang ,D Piccolo ,L Barone ,S Riemann ,A Macchiolo ,K Banicz ,C Mañá ,M W Gruenewald ,Bob Van Der Zwaan

doi:10.1016/0370-2693(96)00096-2

Abstract

We present a study of the structure of hadronic events recorded by the L3 detector at center-of-mass energies of 130 and 136 GeV. The data sample corresponds to an integrated luminosity of 5 pb −1 collected during the high energy run of 1995. The shapes of the event shape distributions and the energy dependence of their mean values are well reproduced by QCD models. From a comparison of the data with resummed O (α s 2) QCD calculations, we determine the strong coupling constant to be α s(133 GeV) = 0.107 ± 0.005(exp) ± 0.006(theor).

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