A study of scaling violations in fragmentation functions performed by the ALEPH collaboration at LEP is presented. Data samples enriched in uds, c, b and gluon jets, respectively, together with measurements of the longitudinal and transverse inclusive cross sections are used to extract the fragmentation function for the gluon and for each flavour. The measurements are compared to data from experiments at energies between 22 GeV and 91 GeV and scaling violations consistent with QCD predictions are observed. From this, a measurement of the strong coupling constant αs(Mz) = 0.126 ±0.009 is obtained.
Measurement of αs from scaling violations in fragmentation functions in e+e− annihilation / D Buskulic;D Casper;I De Bonis;D Decamp;P Ghez;C Goy;J.-P Lees;A Lucotte;M.-N Minard;P Odier;B Pietrzyk;F Ariztizabal;M Chmeissani;J.M Crespo;I Efthymiopoulos;E Fernandez;M Fernandez-Bosman;V Gaitan;Ll Garrido;M Martinez;S Orteu;A Pacheco;C Padilla;F Palla;A Pascual;J.A Perlas;F Sanchez;F Teubert;A Colaleo;D Creanza;M de Palma;A Farilla;G Gelao;M Girone;G Iaselli;G Maggi;M Maggi;N Marinelli;S Natali;S Nuzzo;A Ranieri;G Raso;F Romano;F Ruggieri;G Selvaggi;L Silvestris;P Tempesta;G Zito;X Huang;J Lin;Q Ouyang;T Wang;Y Xie;R Xu;S Xue;J Zhang;L Zhang;W Zhao;G Bonvicini;M Cattaneo;P Comas;P Coyle;H Drevermann;A Engelhardt;R.W Forty;M Frank;R Hagelberg;J Harvey;R Jacobsen;P Janot;B Jost;J Knobloch;I Lehraus;C Markou;E.B Martin;P Mato;H Meinhard;A Minten;R Miquel;T Oest;P Palazzi;J.R Pater;J.-F Pusztaszeri;F Ranjard;P Rensing;L Rolandi;D Schlatter;M Schmelling;O Schneider;W Tejessy;I.R Tomalin;A Venturi;H Wachsmuth;W Wiedenmann;T Wildish;W Witzeling;J Wotschack;Z Ajaltouni;M Bardadin-Otwinowska;A Barres;C Boyer;A Falvard;P Gay;C Guicheney;P Henrard;J Jousset;B Michel;S Monteil;J-C Montret;D Pallin;P Perret;F Podlyski;J Proriol;J.-M Rossignol;F Saadi;T Fearnley;J.B Hansen;J.D Hansen;J.R Hansen;P.H Hansen;B.S Nilsson;A Kyriakis;E Simopoulou;I Siotis;A Vayaki;K Zachariadou;A Blondel;G Bonneaud;J.C Brient;P Bourdon;L Passalacqua;A Rougé;M Rumpf;R Tanaka;A Valassi;M Verderi;H Videau;D.J Candlin;M.I Parsons;E Focardi;G Parrini;M Corden;M Delfino;C Georgiopoulos;D.E Jaffe;A Antonelli;G Bencivenni;G Bologna;F Bossi;P Campana;G Capon;V Chiarella;G Felici;P Laurelli;G Mannocchi;F Murtas;G.P Murtas;M Pepe-Altarelli;S.J Dorris;A.W Halley;I ten Have;I.G Knowles;J.G Lynch;W.T Morton;V O'Shea;C Raine;P Reeves;J.M Scarr;K Smith;M.G Smith;A.S Thompson;F Thomson;S Thorn;R.M Turnbull;U Becker;O Braun;C Geweniger;G Graefe;P Hanke;V Hepp;E.E Kluge;A Putzer;B Rensch;M Schmidt;J Sommer;H Stenzel;K Tittel;S Werner;M Wunsch;R Beuselinck;D.M Binnie;W Cameron;D.J Colling;P.J Dornan;N Konstantinidis;L Moneta;A Moutoussi;J Nash;G San Martin;J.K Sedgbeer;A.M Stacey;G Dissertori;P Girtler;E Kneringer;D Kuhn;G Rudolph;C.K Bowdery;T.J Brodbeck;P Colrain;G Crawford;A.J Finch;F Foster;G Hughes;T Sloan;E.P Whelan;M.I Williams;A Galla;A.M Greene;K Kleinknecht;G Quast;J Raab;B Renk;H.-G Sander;R Wanke;C Zeitnitz;J.J Aubert;A.M Bencheikh;C Benchouk;A Bonissent;G Bujosa;D Calvet;J Carr;C Diaconu;F Etienne;M Thulasidas;D Nicod;P Payre;D Rousseau;M Talby;I Abt;R Assmann;C Bauer;W Blum;D Brown;H Dietl;F Dydak;G Ganis;C Gotzhein;K Jakobs;H Kroha;G Lütjens;G Lutz;W Männer;H.-G Moser;R Richter;A Rosado-Schlosser;S Schael;R Settles;H Seywerd;U Stierlin;R.St Denis;G Wolf;R Alemany;J Boucrot;O Callot;A Cordier;F Courault;M Davier;L Duflot;J.-F Grivaz;Ph Heusse;M Jacquet;D.W Kim;F Le Diberder;J Lefrançois;A.-M Lutz;G Musolino;I Nikolic;H.J Park;I.C Park;M.-H Schune;S Simion;J.-J Veillet;I Videau;D Abbaneo;P Azzurri;G Bagliesi;G Batignani;S Bettarini;C Bozzi;G Calderini;M Carpinelli;M.A Ciocci;V Ciulli;R Dell'Orso;R Fantechi;I Ferrante;L Foà;F Forti;A Giassi;M.A Giorgi;A Gregorio;F Ligabue;A Lusiani;P.S Marrocchesi;A Messineo;G Rizzo;G Sanguinetti;A Sciabà;P Spagnolo;J Steinberger;R Tenchini;G Tonelli;G Triggiani;C Vannini;P.G Verdini;J Walsh;A.P Betteridge;G.A Blair;L.M Bryant;F Cerutti;Y Gao;M.G Green;D.L Johnson;T Medcalf;Ll.M Mir;P Perrodo;J.A Strong;V Bertin;D.R Botterill;R.W Clifft;T.R Edgecock;S Haywood;M Edwards;P Maley;P.R Norton;J.C Thompson;B Bloch-Devaux;P Colas;H Duarte;S Emery;W Kozanecki;E Lançon;M.C Lemaire;E Locci;B Marx;P Perez;J Rander;J.-F Renardy;A Rosowsky;A Roussarie;J.-P Schuller;J Schwindling;D Si Mohand;A Trabelsi;B Vallage;R.P Johnson;H.Y Kim;A.M Litke;M.A McNeil;G Taylor;A Beddall;C.N Booth;R Boswell;S Cartwright;F Combley;I Dawson;A Koksal;M Letho;W.M Newton;C Rankin;L.F Thompson;A Böhrer;S Brandt;G Cowan;E Feigl;C Grupen;G Lutters;J Minguet-Rodriguez;F Rivera;P Saraiva;L Smolik;F Stephan;M Apollonio;L Bosisio;R Della Marina;G Giannini;B Gobbo;F Ragusa;J Rothberg;S Wasserbaech;S.R Armstrong;L Bellantoni;P Elmer;Z Feng;D.P.S Ferguson;Y.S Gao;S González;J Grahl;J.L Harton;O.J Hayes;H Hu;P.A McNamara;J.M Nachtman;W Orejudos;Y.B Pan;Y Saadi;M Schmitt;I.J Scott;V Sharma;J.D Turk;A.M Walsh;Sau Lan Wu;X Wu;J.M Yamartino;M Zheng;G Zobernig. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - ELETTRONICO. - 357:(1995), pp. 487-499. [10.1016/0370-2693(95)00917-A]
Measurement of αs from scaling violations in fragmentation functions in e+e− annihilation
FOCARDI, ETTORE;CIULLI, VITALIANO;
1995
Abstract
A study of scaling violations in fragmentation functions performed by the ALEPH collaboration at LEP is presented. Data samples enriched in uds, c, b and gluon jets, respectively, together with measurements of the longitudinal and transverse inclusive cross sections are used to extract the fragmentation function for the gluon and for each flavour. The measurements are compared to data from experiments at energies between 22 GeV and 91 GeV and scaling violations consistent with QCD predictions are observed. From this, a measurement of the strong coupling constant αs(Mz) = 0.126 ±0.009 is obtained.I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.