The scale dependence of the hadron multiplicity in quark and gluon jets and a precise determination of C-A/C-F

Authors
Abreu, P Abreu, P Adam, W Adye, T Adzic, P Ajinenko, I Albrecht, Z Alderweireld, T Alekseev, GD Alemany, R Allmendinger, T Allport, PP Almehed, S Amaldi, U Amato, S Anassontzis, EG Andersson, P Andreazza, A Andringa, S Antilogus, P Apel, WD Arnoud, Y Asman, B Augustin, JE Augustinus, A Baillon, P Bambade, P Barao, F Barbiellini, G Barbier, R Bardin, DY Barker, G Baroncelli, A Battaglia, M Baubillier, M Becks, KH Begalli, M Beilliere, P Belokopytov, Y Benvenuti, AC Berat, C Berggren, M Bertini, D Bertrand, D Besancon, M Bianchi, F Bigi, M Bilenky, MS Bizouard, MA Bloch, D Blom, HM Bonesini, M Bonivento, W Boonekamp, M Booth, PSL Borgland, AW Borisov, G Bosio, C Botner, O Boudinov, E Bouquet, B Bourdarios, C Bowcock, TJV Boyko, I Bozovic, I Bozzo, M Branchini, P Brenke, T Brenner, RA Bruckman, P Brunet, JM Bugge, L Buran, T Burgsmueller, T Buschmann, P Cabrera, S Caccia, M Calvi, M Rozas, AJC Camporesi, T Canale, V Carena, F Carroll, L Caso, C Gimenez, MVC Cattai, A Cavallo, FR Chabaud, V Charpentier, P Chaussard, L Checchia, P Chelkov, GA Chierici, R Chliapnikov, P Chochula, P Chorowicz, V Chudoba, J Collins, P Contri, R Cortina, E Cosme, G Cossutti, F Cowell, JH Crawley, HB Crennell, D Crepe, S Crosetti, G Maestro, JC Czellar, S Damgaard, G Davenport, M Da Silva, W Deghorain, A Della Ricca, G Delpierre, P Demaria, N De Angelis, A De Boer, W De Brabandere, S De Clercq, C De Lotto, B De Min, A De Paula, L Dijkstra, H Di Ciaccio, L Dolbeau, J Doroba, K Dracos, M Drees, J Dris, M Duperrin, A Durand, JD Eigen, G Ekelof, T Ekspong, G Ellert, M Elsing, M Engel, JP Erzen, B Santo, ME Falk, E Fanourakis, G Fassouliotis, D Fayot, J Feindt, M Ferrari, P Ferrer, A Ferrer-Ribas, E Fichet, S Firestone, A Flagmeyer, U Foeth, H Fokitis, E Fontanelli, F Franek, B Frodesen, AG Fruhwirth, R Fulda-Quenzer, F Fuster, J Galloni, A Gamba, D Gamblin, S Gandelman, M Garcia, C Garcia, J Gaspar, C Gaspar, M Gasparini, U Gavillet, P Gazis, EN Gele, D Gerdyukov, L Ghodbane, N Gil, I Glege, F Gokieli, R Golob, B Gomez-Ceballos, G Goncalves, P Caballero, IG Gopal, G Gorn, L Gorski, M Gouz, Y Gracco, V Grahl, J Graziani, E Green, C Grimm, HJ Gris, P Grosdidier, G Grzelak, K Gunther, M Guy, J Hahn, F Hahn, S Haider, S Hallgren, A Hamacher, K Hansen, J Harris, FJ Hedberg, V Heising, S Hernandez, JJ Herquet, P Herr, H Hessing, TL Heuser, JM Higon, E Holmgren, SO Holt, PJ Hoorelbeke, S Houlden, M Hrubec, J Huet, K Hughes, GJ Hultqvist, K Jackson, JN Jacobsson, R Jalocha, P Janik, R Jarlskog, C Jarlskog, G Jarry, P Jean-Marie, B Johansson, EK Jonsson, P Joram, C Juillot, P Kapusta, F Karafasoulis, K Katsanevas, S Katsoufis, EC Keranen, R Kersevan, BP Khomenko, BA Khovanski, NN Kiiskinen, A King, B Kinvig, A Kjaer, NJ Klapp, O Klein, H Kluit, P Kokkinias, P Koratzinos, M Kostioukhine, V Kourkoumelis, C Kouznetsov, O Krammer, M Kriznic, E Krstic, J Krumstein, Z Kubinec, P Kucewicz, W Kurowska, J Kurvinen, K Lamsa, JW Lane, DW Langefeld, P Lapin, V Laugier, JP Lauhakangas, R Leder, G Ledroit, F Lefebure, V Leinonen, L Leisos, A Leitner, R Lemonne, J Lenzen, G Lepeltier, V Lesiak, T Lethuillier, M Libby, J Liko, D Lipniacka, A Lippi, I Loerstad, B Loken, JG Lopes, JH Lopez, JM Lopez-Fernandez, R Loukas, D Lutz, P Lyons, L MacNaughton, J Mahon, JR Maio, A Malek, A Malmgren, TGM Malychev, V Mandl, F Marco, J Marco, R Marechal, B Margoni, M Marin, JC Mariotti, C Markou, A Martinez-Rivero, C Martinez-Vidal, F Garcia, SMI Masik, J Mastroyiannopoulos, N Matorras, F Matteuzzi, C Matthiae, G Mazzucato, F Mazzucato, M Mc Cubbin, M Mc Kay, R Mc Nulty, R Mc Pherson, G Meroni, C Meyer, WT Miagkov, A Migliore, E Mirabito, L Mitaroff, WA Mjoernmark, U Moa, T Moch, M Moeller, R Moenig, K Monge, MR Moreau, X Morettini, P Morton, G Mueller, U Muenich, K Mulders, M Mulet-Marquis, C Muresan, R Murray, WJ Muryn, B Myatt, G Myklebust, T Naraghi, F Navarria, FL Navas, S Nawrocki, K Negri, P Nemecek, S Neufeld, N Neumeister, N Nicolaidou, R Nielsen, BS Nikolenko, M Nomokonov, V Normand, A Nygren, A Obraztsov, V Olshevski, AG Onofre, A Orava, R Orazi, G Osterberg, K Ouraou, A Paganoni, M Paiano, S Pain, R Paiva, R Palacios, J Palka, H Papadopoulou, TD Papageorgiou, K Pape, L Parkes, C Parodi, F Parzefall, U Passeri, A Passon, O Pegoraro, M Peralta, L Perrotta, A Petridou, C Petrolini, A Phillips, HT Pierre, F Pimenta, M Piotto, E Podobnik, T Pol, ME Polok, G Poropat, P Pozdniakov, V Privitera, P Pukhaeva, N Pullia, A Radojicic, D Ragazzi, S Rahmani, H Rakoczy, D Ratoff, PN Read, AL Rebecchi, P Redaelli, NG Regler, M Reid, D Reinhardt, R Renton, PB Resvanis, LK Richard, F Ridky, J Rinaudo, G Rohne, O Romero, A Ronchese, P Rosenberg, EI Rosinsky, P Roudeau, P Rovelli, T Royon, C Ruhlmann-Kleider, V Ruiz, A Saarikko, H Sacquin, Y Sadovsky, A Sajot, G Salt, J Sampsonidis, D Sannino, M Schneider, H Schwemling, P Schwickerath, U Schyns, MAE Scuri, F Seager, P Sedykh, Y Segar, AM Sekulin, R Shellard, RC Sheridan, A Siebel, M Simard, L Simonetto, F Sisakian, AN Smadja, G Smirnova, O Smith, GR Sokolov, A Solovianov, O Sopczak, A Sosnowski, R Spassov, T Spiriti, E Sponholz, P Squarcia, S Stampfer, D Stanescu, C Stanic, S Stevenson, K Stocchi, A Strauss, J Strub, R Stugu, B Szczekowski, M Szeptycka, M Tabarelli, T Tegenfeldt, F Terranova, F Thomas, J Timmermans, J Tinti, N Tkatchev, LG Todorova, S Tome, B Tonazzo, A Tortora, L Transtromer, G Treille, D Tristram, G Trochimczuk, M Troncon, C Tsirou, A Turluer, ML Tyapkin, IA Tzamarias, S Ueberschaer, B Ullaland, O Uvarov, V Valenti, G Vallazza, E Van Apeldoorn, GW Van Dam, P Van Eldik, J Van Lysebetten, A Van Vulpen, I Vassilopoulos, N Vegni, G Ventura, L Venus, W Verbeure, F Verlato, M Vertogradov, LS Verzi, V Vilanova, D Vitale, L Vlasov, E Vodopyanov, AS Vollmer, C Voulgaris, G Vrba, V Wahlen, H Walck, C Weiser, C Wicke, D Wickens, JH Wilkinson, GR Winter, M Witek, M Wolf, G Yi, J Yushchenko, O Zalewska, A Zalewski, P Zavrtanik, D Zevgolatakos, E Zimin, NI Zucchelli, GC Zumerle, G
Citation
P. Abreu et al., The scale dependence of the hadron multiplicity in quark and gluon jets and a precise determination of C-A/C-F, PHYS LETT B, 449(3-4), 1999, pp. 383-400
Citations number
47
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICS LETTERS B
ISSN journal
0370-2693 → ACNP
Volume
449
Issue
3-4
Year of publication
1999
Pages
383 - 400
Database
ISI
SICI code
0370-2693(19990311)449:3-4<383:TSDOTH>2.0.ZU;2-K
Abstract
Data collected at the Z resonance using the DELPHI detector at LEP are used to determine the charged hadron multiplicity in gluon and quark jets as a function of a transverse momentum-like scale. The colour factor ratio, C-A/ C-F, is directly observed in the increase of multiplicities with that scale . The smaller than expected multiplicity ratio in gluon to quark jets is un derstood by differences in the hadronization of the leading quark or gluon. From the dependence of the charged hadron multiplicity on the opening angl e in symmetric three-jet events the colour factor ratio is measured to be: C-A/C-F = 2.246 +/- 0.062(stat.) +/- 0.080(syst.) +/- 0.095(theo.) (C) 1999 Elsevier Science B.V, All rights reserved.