Topology of hadronic e+e− annihilation events at 22 and 34 GeV CM energy
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Topology of hadronic e+e− annihilation events at 22 and 34 GeV CM energy

H.-J. Behrend,Ch. Chen,J.H. Field,U. Gümpel,V. Schröder,H. Sindt,W.-D. Apel,S. Banerjee,J. Bodenkamp,D. Chrobaczek,J. Engler,G. Flügge,D.C. Fries,W. Fues,G. Hopp,H. Kuster,H. Müller,H. Randoll,G. Schmidt,H. Schneider,W. De Boer,G. Buschhorn,G. Grindhammer,P. Grosse-Wiesmann,B. Gunderson,C. Kiesling,R. Kotthaus,U. Kruse,H. Lierl,D. Lüers,T. Meyer,L. Moss,H. Oberlack,P. Schacht,M.-J. Schachter,A. Snyder,H. Steiner,G. Carnesecchi,A. Cordier,M. Davier,D. Fournier,J.F. Grivaz,J. Haissinski,V. Journé,A. Klarsfeld,F. Laplanche,F. Le Diberder,U. Mallik,J.-J. Veillet,A. Weitsch,R. George,M. Goldberg,B. Grossetête,F. Kapusta,F. Covacs,G. London,L. Poggioli,M. Rivoal,R. Aleksan,J. Bouchez,G. Cozzika,Y. Ducros,A. Gaidot,S. Jadach,Y. Lavagne,J. Pamela,J.P. Pansart,F. Pierre,CELLO Collaboration;H.-J. Behrend;Ch. Chen;J.H. Field;U. Gümpel;V. Schröder;H. Sindt;W.-D. Apel;S. Banerjee;J. Bodenkamp;D. Chrobaczek;J. Engler;G. Flügge;D.C. Fries;W. Fues;G. Hopp;H. Kuster;H. Müller;H. Randoll;G. Schmidt;H. Schneider;W. De Boer;G. Buschhorn;G. Grindhammer;P. Grosse-Wiesmann;B. Gunderson;C. Kiesling;R. Kotthaus;U. Kruse;H. Lierl;D. Lüers;T. Meyer;L. Moss;H. Oberlack;P. Schacht;M.-J. Schachter;A. Snyder;H. Steiner;G. Carnesecchi;A. Cordier;M. Davier;D. Fournier;J.F. Grivaz;J. Haissinski;V. Journé;A. Klarsfeld;F. Laplanche;F. Le Diberder;U. Mallik;J.-J. Veillet;A. Weitsch;R. George;M. Goldberg;B. Grossetête;F. Kapusta;F. Covacs;G. London;L. Poggioli;M. Rivoal;R. Aleksan;J. Bouchez;G. Cozzika;Y. Ducros;A. Gaidot;S. Jadach;Y. Lavagne;J. Pamela;J.P. Pansart;F. Pierre;CELLO Collaboration;
physics letters b 1982 Vol. 110 pp. 329-334
217
collaboration1982physicstopology

Abstract

The topology of hadronic e+e− annihilation events has been analysed using the sphericity tensor and a cluster method. Comparison with quark models including gluon bremsstrahlung yields good agreement with the data. The strong-coupling constant is determined in 1st order QCD to be αS=0.19±0.04 (stat) ± 0.04 (syst.) at 22 GeV and αS=0.16 ±0.02± 0.03 at 34 GeV. The differential cross section with respect to the energy fraction carried by the most energetic parton agrees with the prediction of QCD, but cannot be reproduced by a scalar gluon model. These results are stable against variations of the transverse momentum distribution of the fragmentation function within the quoted errors.

Keywords

topology agreement function models gev differential transverse hadronic annihilation

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DOI:
10.1016/0370-2693(82)91266-7
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https://sciprofiles.com/publication/view/b9f6cc314...

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