Determination of in second order QCD from hadronic Z decays

P. Abreu,W. Adam,F. Adami,T. Adye,T. Akesson,G. D. Alekseev,P. Allen,S. Almehed,S. J. Alvsvaag,U. Amaldi,E Anassontzis,P. Antilogus,W-D. Apel,R. J. Apsimon,B. Asman,J-E. Augustin,A. Augustinus,P. Baillon,P. Bambade,F. Barao,G. Barbiellini,A. Baroncelli,M. J. Bates,M. Battaglia,M. Baubillier,K-H. Becks,C. J. Beeston,P. Beilliere,Yu. Belokopytov,P. Beltran,D. Benedic,J. M. Benlloch,M. Berggren,D. Bertrand,F. Bianchi,P. Billoir,S. Blyth,V. Bocci,P. N. Bogolubov,T. Bolognese,M. Bonapart,M. Bonesini,W. Bonivento,P. S. L. Booth,P. Borgeaud,G. Borisov,H. Borner,C. Bosio,B. Bostjancic,O. Botner,B. Bouquet,C. Bourdarios,S. Braibant,P. Branchini,K. D. Brand,R. A. Brenner,H. Briand,C. Bricman,R. C. A. Brown,N. Brummer,J-M. Brunet,L. Bugge,T. Buran,H. Burmeister,J. A. M. A. Buytaert,M. Caccia,M. Calvi,A. J. Camacho Rozas,A. Campion,T. Camporesi,V. Canale,F. Cao,F. Carena,L. Carroll,M. V. Castillo Gimenez,A. Cattai,F. R. Cavallo,L. Cerrito,A. Chan,M. Chapkin,P. Charpentier,L. Chaussard,J. Chauveau,P. Checchia,G. A. Chelkov,L. Chevalier,P. Chliapnikov,V. Chorowicz,M. P. Clara,P. Collins,F. Couchot,H. B. Crawley,D. Crennel,G. Crosetti,M. Crozon,J. Cuevas Maestro,S. Czellar,S. Dagoret, - E.Dahl, Jensen,B. Dalmagne,M. Dam,G. Damgaard,E. Daubie,P. D. Dauncey,M. Davenport,P. David,C. Defoix,D. Delikaris,S. Delorme,P. Delpierre,N. Demaria,A. De Angelis,M. De Beer,H. De Boeck,W. De Boer,C. De Clercq,M. D. M. De Fez Laso,N. De Groot,C. De La Vaissiere,H. Dijkstra,L. Di Ciaccio,J. Dolbeau,O. Doll,M. Donszelmann,K. Doroba,M. Dracos,J. Drees,M. Dris,Y. Dufour,W. Dulinski,L-O. Eek,P. A.-M. Eerola,T. Ekelof,G. Ekspong,A. Elliot Peisert,D. Fassouliotis,M. Feindt,A. Fenyuk,M. Fernandez Alonso,A. Ferrer,T. A. Filippas,A. Firestone,H. Foeth,E. Fokitis,P. Folegati,B. Franek,P. Frenkiel,D. C. Fries,A. G. Frodesen,R. Fruhwirth,F. Fulda-Quenzer, K. Furniva,H. Furstenau,J. Fuster,G. Galeazzi,C. Garcia,J. Garcia,C. Gaspar,U. Gasparini,P. Gavillet,E. N. Gazis,J-P. Gerber,P. Giacomelli,R. Gokieli,J. J. Gomez Y Cadenas,A. Goobar,G. Gopa,M. Gorski,V. Gracco,E. Graziani,G. Grosdidier,E. Gross,P. Grosse-Wiesmann,B. Grossetete,F. Hahn,S. Haider,A. Hakansson,A. Hallgren,K. Hamacher,G. Hamel De Monchenault,F. J. Harris,T. Henkes,J. J. Hernandez,P. Herquet,H. Herr,I. Hietanen,E. Higon,H. J. Hilke,S. D. Hodgson, T. Hofmok,S-O. Holmgren,D. Holthuizen,P. F. Honore,J. E. Hooper,M. Houlden,J. Hrubec,P. O. Hulth,K. Hultqvist,D. Husson,P. Ioannou,D. Isenhower,P-S. Iversen,J. N. Jackson,P. Jalocha,G. Jarlskog,P. Jarry,E. K. Johansson,D. Johnson,M. Jonker,L. Jonsson,P. Juillot,G. Kalkanis,G. Kalmus,F. Kapusta,S. Katsanevas,E. C. Katsoufis,R. Keranen,J. Kesteman,B. A. Khomenko,N. N. Khovanski,B. King,N. J. Kjaer,H. Klein,W. Klempt,A. Klovning,P. Kluit,A. Koch-Mehrin,J. H. Koehne,B. Koene,M. Kopf,M. Koratzinos, K. Korcy,A. V. Korytov,V. Kostiukhin,C. Kourkoumelis,P. H. Kramer,T. Kreuzberger,J. Krolikowski,I. Kronkvist,J. Krstic,W. Krupinski,W. Kucewicz,K. Kurvinen,C. Lacasta,C. Lambropoulos,J. W. Lamsa,L. Lanceri,J-P. Laugier,R. Lauhakangas,G. Leder,F. Ledroit,R. Leitner,Y. Lemoigne,J. Lemonne,G. Lenzen,V. Lepeltier,D. Liko,E. Lillethun,J. Lindgren,R. Lindner,A. Lipniacka,I. Lippi,B. Loerstad,M. Lokajicek,J. G. Loken,M. A. Lopez Aguera,M. LOS,D. Loukas,A. Lounis,J. J. Lozano,P. Lutz,L. Lyons,G. Maehlum,N. Magnussen,J. Maillard,A. Maltezos, J. Marco,M. Margoni,J-C. Marin,A. Markou,T. Maron,L. Mathis,F. Matorras,C. Matteuzzi,G. Matthiae,M. Mazzucato,M. McCubbin,W. T. Meyer,M. Michelotto, W. A. Mitarofff,G. V. Mitselmakher,P. Negri

semanticscholar（2006）

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Abstract

Distributions of event shape variables obtained from 120600 hadronic Z decays measured with the DELPHI detector are compared to the predictions of QCD based event generators. Values of the strong coupling constant c~ s are derived as a function of the renormalization scale from a quantitative analysis of eight hadronic distributions. The final result, c% (Mz) = 0.113 +_ 0.007, is based on second order perturbation theory and uses two hadronization corrections, one computed with a pat ton shower model and the other with a QCD matrix element model.

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