Determination of 55-155-155-1in second order QCD from hadronicZ decays

P. Abreu,W. Adam,F. Adami,T. Adye,T. P. A. Åkesson,G. D. Alekseev,P. Allen,S. Almehed,S. J. Alvsvaag,U. Amaldi,E. Anassontzis,P. Antilogus,W. D. Apel,R. Apsimon,B. Åsman,J. E. Augustin,A. Augustinus,P. Baillon,P. Bambade,F. Barão,R. Barate,G. Barbiellini,D. Y. Bardin,A. Baroncelli,O. Bärring,W. Bartl,M. J. Bates,M. Battaglia,M. Baubillier,K. H. Becks,C. Beeston,M. Begalli,P. Beillière,Yu. Belokopytov,P. Beltran,D. Benedic, J. Benlloch,M. Berggren,Daniel Bertrand,F. Bianchi,M. S. Bilenky,P. Billoir,J. Bjarne,D. Blöch,S. Blyth,V. Bocci,P. N. Bogolubov,T. Bologneşe,M. Bonapart,M. Bonesini,W. Bonivento,P.S.L. Booth,P. Borgeaud,G. Borisov,H. Borner,C. Bosio,B. Boštjančič,O. Botner,B. Bouquet,C. Bourdarios,M. Bozzo,S. Braibant,P. Branchini,K. D. Brand,R. Brenner,H. Briand,C. Bricman,R.C.A. Brown,N. Brümmer,J. M. Brunet,L. Bugge,T. Buran,H. Burmeister,J. Buytaert,M. Caccia,M. Calvi,Aurelio Juste Rozas,A. Campion,T. Camporesi,V. Canale,F. Cao,F. Carena,L. Carroll,C. Caso,E. Castelli,M. V. Castillo Gimenez,A. Cattai,F. R. Cavallo,L. Cerrito,A. Chan,M. Chapkin,Ph. Charpentier,L. Chaussard,J. Chauveau,P. Checchia,G. Chelkov,L. Chevalier,P. Chliapnikov,V. Chorowicz,R. Cirio,M.P. Clara,P. Collins,J. L. Contreras,R. Contri,G. Cosme,F. Couchot,H. B. Crawley,D. Crennell,G. Crosetti,M. Crozon,J. Cuevas,S. Czellár,S. Dagoret,E. Dahl‐Jensen,B. Dalmagne,M. Dam,G. Damgaard,G. Darbo,E. Daubie,P. D. Dauncey,M. Davenport,P. David,W. Da Silva,C. Defoix,D. Delikaris,Stefan 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,Ch De La Vaissière,B. De Lotto,A. De Min,H. Dijkstra,L. Di Ciaccio,F. Djama,J. Dolbeau,O. Doll,M. Dönszelmann,K. Doroba,M. Dracos,J. Drees,M. Dris,Y. Dufour,W. Dulinski,L. O. Eek,P. Eerola,T. Ekelöf,G. Ekspong,A. Elliot Peisert,J. P. Engel,D. Fassouliotis,M. Feindt,A. B. Fenyuk,M. Fernández Alonso,A. Ferrer,T. A. Filippas,A. Firestone,H. Foeth,E. Fokitis,P. Folegati,F. Fontanelli,K.A.J. Forbes,B. Franek,P. Frenkiel,D. C. Fries,A. G. Frodesen,R. Frühwirth,F. Fulda-Quenzer,K. Furnival,H. Fürstenau,J. Fuster,G. Galeazzi,D. Gamba,C. Garcı́a,J. M. Vizan Garcia,C. Gaspar,U. Gasparini,Ph. Gavillet,E. N. Gazis,J. Gerber,P. Giacomelli,R. Gokieli, V. Golovatyuk,J. J. Gomez Y Cadenas,A. Goobar,G. P. Gopal,M. Górski,V. Gracco,A. Grant,F. Grard,E. Graziani,G. Grosdidier,E. Gross,P. Grosse‐Wiesmann,B. Grossetête,J. Guy,F. Hahn,M. Hahn,S. Haider,Z. Hajduk,A. Hakansson,A. Hallgren,K. Hamacher,G. Hamel de Monchenault,F. J. Harris,B. Heck,T. Henkes,J. J. Hernández,P. Herquet,H. Herr,I. Hietanen,C. O. Higgins,E. Higón,H. J. Hilke,S. D. Hodgson,T. Hofmokl,R. Holmes,S. O. Holmgren,D. Holthuizen,P. F. Honoré,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. Jałocha,G. Jarlskog,P. Jarry,B. Jean‐Marie,Erik Johansson,D. Johnson,M. Jonker,L. Jönsson,P. Juillot,G. Kalkanis,G. Kalmus,F. Kapusta,M. Karlsson,S. Katsanevas, E. Katsoufis,R. Keränen,J. Kesteman,B. A. Khomenko,N. N. Khovanski,B. T. King,N. J. Kjaer,H. Klein,W. Klempt,A. Klovning,P. Kluit,A. Koch-Mehrin,J. H. Koehne,B. Koene,P. Kokkinias,M. Kopf,M. Koratzinos,K. Korcyl,A. Korytov, V. Kostiukhin,Christine Kourkoumelis, P. Kramer,T. Kreuzberger,J. Królikowski,I. Kronkvist,J. Krstić, U. Krüner-Marquis,W. Krupinski,W. Kucewicz,K. Kurvinen,C. Lacasta,C. Lambropoulos,J. Lämsä,L. Lanceri,V. Lapin,J. P. Laugier,R. Lauhakangas,G. Leder,F. Ledroit,R. Leitner,Y. Lemoigne,J. Lemonne,G. Lenzen,V. Lepeltier,A. Letessier‐Selvon,E. Lieb,D. Liko,E. Lillethun,J. Lindgren,R. Lindner,A. Lipniacka,I. Lippi,R. Llosá,B. Loerstad,M. Lokajı́ček,J. Loken,A. Lopez-Fernandez,M. A. Lopez Aguera,M. Los,D. Loukas,A. Lounis,J. Lozano,P. Lutz,L. Lyons,G. Mæhlum,N. Magnussen,J. Maillard,A. Maltezos,F. Mandl,J. Marco,M. Margoni,J. C. Marin,Α. Μάρκου,T. Maron,S. Martí,L. Mathis,F. Matorras,C. Matteuzzi,G. Matthiae,M. Mazzucato,M. McCubbin,R. McKay,R. McNulty,G. Meola,C. Meroni,W. T. Meyer,M. Michelotto,W. Mitaroff,G. Mitselmakher,U. Mjoernmark,T. Moa,R. Moeller,K. Mönig,M. R. Monge,P. Morettini,H. Mueller,W. J. Murray,B. Muryn,G. Myatt,F. Naraghi,F. L. Navarria,P. Negri,B. S. Nielsen,B. Nijjhar,V. Nikolaenko,V. Obraztsov,K. Oesterberg,A. G. Olshevski,R. Orava,A. Ostankov,A. Ouraou,M. Paganoni,R. Pain,H. Pałka,Th. D. Papadopoulou,L. Pape,A. Passeri,M. Pegoraro,J. Pennanen,V. Perevozchikov,M. Pernicka,A. Perrotta,F. Pierre,M. Pimenta,O. Pingot,M. E. Pol,G. Polok,P. Poropat,P. Privitera,A. Pullia,D. Radojičić,S. Ragazzi,P. N. Ratoff,A. L. Read,N. Redaelli,M. Regler,D. Reid,P. Renton,L. K. Resvanis,F. Richard,M. Richardson,J. R̆ídký,G. Rinaudo,I. Roditi,A. Romero,I. Roncagliolo,P. Ronchese,V. M. Ronjin,C. Rönnqvist,E. I. Rosenberg,U. Rossi,E. Rosso,P. Roudeau,T. Rovelli,W. Ruckstuhl,V. Ruhlmann,A. Ruiz,K. Rybicki,H. Saarikko,Y. Sacquin,G. Sajot,J. Salt,E. Sánchez,J. Sánchez,M. Sannino,M. Schaeffer,S. Schael,H. Schneider,M. A E Schyns,F. Scuri,A. M. Segar,R. Sekulin,M. Sessa,G. Sette,R. Seufert,R. C. Shellard,P. Siegrist,S. Simonetti,F. Simonetto, A. Sissakian,T. B. Skaali,G. Skjevling,G. Smadja,G. R. Smith,R. Sosnowski,T. S. Spassoff,E. Spiriti,S. Squarcia,H. Staeck,C. Stănescu,G. Stavropoulos,F. Stichelbaut,A. Stocchi,J. Strauss,R. Strub,M. Szczekowski,M. Szeptycka,P. Szymański,T. Tabarelli,S. Tavernier,O. Tchikilev,G. Theodosiou,A. Tilquin,J. Timmermans,V. G. Timofeev,L. G. Tkatchev,T. Todorov,D. Z. Toet,O. Toker,A. Tomaradze,E. Torassa,L. Tortora,M. T. Trainor,D. Treille,U. Trevisan,W. Trischuk,G. Tristram,C. Troncon,A. Tsirou,E. N. Tsyganov,M. Turała,R. Turchetta,M. L. Turluer,T. Tuuva,I. A. Tyapkin,M. Tyndel,S. Tzamarias,B. Überschär, S. Überchär,O. Ullaland,V. Uvarov,G. Valenti,E. Vallazza,J. A. Valls Ferrer,C. Vander Velde,G. W. van Apeldoorn,P. Van Dam,W. K. Van Dominck,J. Varela,P. Vaz,G. Vegni,L. Ventura,W. Vénus,F. Verbeure,L. S. Vertogradov,D. Vilanova, N.K. Vishnevsky,L. Vitale,E. Vlasov,S. Vlassopoulos,A. Vodopyanov,M. Vollmer,S. Volponi,G. Voulgaris,M. Voutilainen,V. Vrba,H. Wahlen,C. Walck,F. Waldner,M. Wayne,A. Wehr,M. Weierstall,P. Weilhammer,John S. Werner,A. M. Wetherell,J. Wickens,J. Wikne,G. Wilkinson,W. S. C. Williams,M. Winter,D. Wormald,G. Wormser,K. Woschnagg,N. Yamdagni,P. Yepes,A. M. Zaǐtsev,A. Zalewska,P. Zalewski,D. Zavrtanik,E. Zevgolatakos,G. Zhang,N. I. Zimin,M. Zito,R. Zitoun,P. Zukanovich Funchal,G. Zumerle,J. Zúñiga

European Physical Journal C（1992）

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摘要

Distributions of event shape variables obtained from 120600 hadronicZ decays measured with the DELPHI detector are compared to the predictions of QCD based event generators. Values of the strong coupling constant αs are derived as a function of the renormalization scale from a quantitative analysis of eight hadronic distributions. The final result, αs(M Z), is based on second order perturbation theory and uses two hadronization corrections, one computed with a parton shower model and the other with a QCD matrix element model.

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关键词

quantitative analysis,perturbation theory,second order

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