An analysis of the charged and neutral energy flow in e+e− hadronic annihilation at 34 GeV, and a determination of the QCD effective coupling constant

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ID: 270702
1982
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Abstract
Using both charged and neutral components, 2600 multihadronic e+e− annihilation events, recorded at 34 GeV by the CELLO detector at PETRA, have been analysed in a calometric approach. The fraction of energy carried by gamma rays is measured to be fγ = (26.0 ± 0.4 (stat) ± 4.0 (syst)%. The neutral energy flow is seen to follow closely the overall energy flow. From the corrected oblateness distribution, a first order determination of αs is performed. The result is αs = 0.16 ± 0.01 (stat) ± 0.03 (syst).
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Authors H.J. Behrend,Ch. Chen,H. Fenner,J.H. Field,V. Schröder,H. Sindt,G. D'agostini,W.D. Apel,S. Banerjee,J. Bodenkamp,D. Chrobaczek,J. Engler,G. Flügge,D.C. Fries,W. Fues,K. Gamerdinger,G. Hopp,H. Küster,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,H. Oberlack,P. Schacht,M.J. Schachter,A. Snyder,G. Carnesecchi,P. Colas,A. Cordier,M. Davier,D. Fournier,J.F. Grivaz,J. Haïssinski,V. Journé,Andre Klarsfeld,F. Laplanche,F. Le Diberder,U. Mallik,J.J. Veillet,R. George,M. Goldberg,B. Grossetěte,O. Hamon,F. Kapusta,F. Kovacs,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;H.J. Behrend;Ch. Chen;H. Fenner;J.H. Field;V. Schröder;H. Sindt;G. D'agostini;W.D. Apel;S. Banerjee;J. Bodenkamp;D. Chrobaczek;J. Engler;G. Flügge;D.C. Fries;W. Fues;K. Gamerdinger;G. Hopp;H. Küster;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;H. Oberlack;P. Schacht;M.J. Schachter;A. Snyder;G. Carnesecchi;P. Colas;A. Cordier;M. Davier;D. Fournier;J.F. Grivaz;J. Haïssinski;V. Journé;Andre Klarsfeld;F. Laplanche;F. Le Diberder;U. Mallik;J.J. Veillet;R. George;M. Goldberg;B. Grossetěte;O. Hamon;F. Kapusta;F. Kovacs;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;
Journal physics letters b
Year 1982
DOI
10.1016/0370-2693(82)90778-x
URL
https://sciprofiles.com/publication/view/1581cc496fddc8de4faa74c31a01d455
Keywords
energy flow gamma ray coupling constant first order

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