Measurements of the structure of quark and gluon jets in hadronic Z decays

Authors
Barate, R Buskulic, D Decamp, D Ghez, P Goy, C Lees, JP Lucotte, A Merle, E Minard, MN Nief, JY Pietrzyk, B Alemany, R Boix, G Casado, MP Chmeissani, M Crespo, JM Delfino, M Fernandez, E Fernandez-Bosman, M Garrido, L Grauges, E Juste, A Martinez, M Merino, G Miquel, R Mir, LM Park, IC Pascual, A Perlas, JA Riu, I Sanchez, F Colaleo, A Creanza, D de Palma, M Gelao, G Iaselli, G Maggi, G Maggi, M Nuzzo, S Ranieri, A Raso, G Ruggieri, F Selvaggi, G Silvestris, L Tempesta, P Tricomi, A Zito, G Huang, X Lin, J Ouyang, Q Wang, T Xie, Y Xu, R Xue, S Zhang, J Zhang, L Zhao, W Abbaneo, D Becker, U Bright-Thomas, P Casper, D Cattaneo, M Ciulli, V Dissertori, G Drevermann, H Forty, RW Frank, M Hagelberg, R Hansen, JB Harvey, J Janot, P Jost, B Lehraus, I Mato, P Minten, A Moneta, L Pacheco, A Pusztaszeri, JF Ranjard, F Rolandi, L Rousseau, D Schlatter, D Schmitt, M Schneider, O Tejessy, W Teubert, F Tomalin, IR Wachsmuth, H Wagner, A Ajaltouni, Z Badaud, F Chazelle, G Deschamps, O Falvard, A Ferdi, C Gay, P Guicheney, C Henrard, P Jousset, J Michel, B Monteil, S Montret, JC Pallin, D Perret, P Podlyski, F Proriol, J Rosnet, P Hansen, JD Hansen, JR Hansen, PH Nilsson, BS Rensch, B Waananen, A Daskalakis, G Kyriakis, A Markou, C Simopoulou, E Siotis, I Vayaki, A Blondel, A Bonneaud, G Brient, JC Bourdon, P Rouge, A Rumpf, M Valassi, A Verderi, M Videau, H Focardi, E Parrini, G Zachariadou, K Corden, M Georgiopoulos, C Jaffe, DE Antonelli, A Bencivenni, G Bologna, G Bossi, F Campana, P Capon, G Cerutti, F Chiarella, V Felici, G Laurelli, P Mannocchi, G Murtas, F Murtas, GP Passalacqua, L Pepe-Altarelli, M Curtis, L Halley, AW Lynch, JG Negus, P O'Shea, V Raine, C Scarr, JM Smith, K Teixeira-Dias, P Thompson, AS Thomson, E Buchmuller, O Dhamotharan, S Geweniger, C Graefe, G Hanke, P Hansper, G Hepp, V Kluge, EE Putzer, A Sommer, J Tittel, K Werner, S Wunsch, M Beuselinck, R Binnie, DM Cameron, W Dornan, PJ Girone, M Goodsir, S Martin, EB Marinelli, N Moutoussi, A Nash, J Sedgbeer, JK Spagnolo, P Williams, MD Ghete, VM Girtler, P Kneringer, E Kuhn, D Rudolph, G Betteridge, AP Bowdery, CK Buck, PG Colrain, P Crawford, G Finch, AJ Foster, F Hughes, G Jones, RWL Williams, MI Giehl, I Greene, AM Hoffmann, C Jakobs, K Kleinknecht, K Quast, G Renk, B Rohne, E Sander, HG van Gemmeren, P Zeitnitz, C Aubert, JJ Benchouk, C Bonissent, A Bujosa, G Carr, J Coyle, P Etienne, F Leroy, O Motsch, F Payre, P Talby, M Sadouki, A Thulasidas, M Trabelsi, K Aleppo, M Antonelli, M Ragusa, F Berlich, R Blum, W Buscher, V Dietl, H Ganis, G Kroha, H Lutjens, G Mannert, C Manner, W Moser, HG Schael, S Settles, R Seywerd, H Stenzel, H Wiedenmann, W Wolf, G Boucrot, J Callot, O Chen, S Cordier, A Davier, M Duflot, L Grivaz, JF Heusse, P Hocker, A Jacholkowska, A Kim, DW Le Diberder, F Lefrancois, J Lutz, AM Schune, MH Tournefier, E Veillet, JJ Videau, I Zerwas, D Azzurri, P Bagliesi, G Batignani, G Bettarini, S Boccali, T Bozzi, C Calderini, G Carpinelli, M Ciocci, MA Dell'Orso, R Fantechi, R Ferrante, I Foa, L Forti, F Giassi, A Giorgi, MA Gregorio, A Ligabue, F Lusiani, A Marrocchesi, PS Messineo, A Palla, F Rizzo, G Sanguinetti, G Sciaba, A Tenchini, R Tonelli, G Vannini, C Venturi, A Verdini, PG Blair, GA Bryant, LM Chambers, JT Green, MG Medcalf, T Perrodo, P Strong, JA von Wimmersperg-Toeller, JH Botterill, DR Clifft, RW Edgecock, TR Haywood, S Norton, PR Thompson, JC Wright, AE Bloch-Devaux, B Colas, P Emery, S Kozanecki, W Lancon, E Lemaire, MC Locci, E Perez, P Rander, J Renardy, JF Roussarie, A Schuller, JP Schwindling, J Trabelsi, A Vallage, B Black, SN Dann, JH Johnson, RP Kim, HY Konstantinidis, N Litke, AM McNeil, MA Taylor, G Booth, CN Brew, CAJ Cartwright, S Combley, F Kelly, MS Lehto, M Reeve, J Thompson, LF Affholderbach, K Bohrer, A Brandt, S Cowan, G Grupen, C Saraiva, P Smolik, L Stephan, F Apollonio, M Bosisio, L Della Marina, R Giannini, G Gobbo, B Musolino, G Rothberg, J Wasserbaech, S Armstrong, SR Charles, E Elmer, P Ferguson, DPS Gao, Y Gonzalez, S Greening, TC Hayes, OJ Hu, H Jin, S McNamara, PA Nachtman, JM Nielsen, J Orejudos, W Pan, YB Saadi, Y Scott, IJ Walsh, J Wu, SL Wu, X Zobernig, G
Citation
R. Barate et al., Measurements of the structure of quark and gluon jets in hadronic Z decays, EUR PHY J C, 17(1), 2000, pp. 1-18
Citations number
42
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
EUROPEAN PHYSICAL JOURNAL C
ISSN journal
1434-6044 → ACNP
Volume
17
Issue
1
Year of publication
2000
Pages
1 - 18
Database
ISI
SICI code
1434-6044(200010)17:1<1:MOTSOQ>2.0.ZU;2-C
Abstract
An experimental investigation of the structure of identified quark and gluo n jets is presented. Observables related to both the global and internal st ructure of jets are measured; this allows for tests of QCD over a wide rang e of transverse momentum scales. The observables include distributions of j et-shape variables, the mean and standard deviation of the subjet multiplic ity distribution and the fragmentation function for charged particles. The data are compared with predictions of perturbative QCD as well as QCD-based Monte Carlo models. In certain kinematic regions the measurements are sens itive mainly to perturbatively calculable effects, allowing for a test of Q CD. The comparisons are also extended into regions where nonperturbative ef fects become large, and in this way the transition from hard to soft QCD is investigated. It is found that by including leading and next-to-leading lo garithmic contributions in the QCD predictions, the agreement with the data can be extended to lower transverse momentum scales, especially fur gluon jets.