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Measurement of the gluon fragmentation function and a comparison of the scaling violation in gluon and quark jets

Abreu, P.; Adam, W.; Adye, T.; Adzic, P.; Albrecht, Z.; Alderweireld, T.; Alekseev, G. D.; Alemany, R.; Allmendinger, T. and Allport, P. P., et al. (2000) In European Physical Journal C 13(4). p.573-589
Abstract

The fragmentation functions of quarks and gluons are measured in various three-jet topologies in Z decays from the full data set collected with the DELPHI detector at the Z resonance between 1992 and 995. The results at different values of transverse momentum-like scales are compared. A parameterization of the quark and gluon fragmentation functions at a fixed reference scale is given. The quark and gluon fragmentation functions show the predicted pattern of scaling violations. The scaling violation for quark jets as a function of a transverse momentum-like scale is in a good agreement with that observed in lower energy e+e- annihilation experiments. For gluon jets it appears to be significantly stronger. The scale... (More)

The fragmentation functions of quarks and gluons are measured in various three-jet topologies in Z decays from the full data set collected with the DELPHI detector at the Z resonance between 1992 and 995. The results at different values of transverse momentum-like scales are compared. A parameterization of the quark and gluon fragmentation functions at a fixed reference scale is given. The quark and gluon fragmentation functions show the predicted pattern of scaling violations. The scaling violation for quark jets as a function of a transverse momentum-like scale is in a good agreement with that observed in lower energy e+e- annihilation experiments. For gluon jets it appears to be significantly stronger. The scale dependences of the gluon and quark fragmentation functions agree with the prediction of the DGLAP evolution equations from which the colour factor ratio CA/CF is measured to be: CA/CF = 2.26 ± 0.09stat. ± 0.06sys. ± 0.12clus.,scale..

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European Physical Journal C
volume
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Springer
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  • scopus:0007118935
ISSN
1434-6044
DOI
10.1007/s100520000313
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English
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44dae623-c0f2-4b4d-bf57-ec466b9a7672
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2018-03-05 21:22:46
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@article{44dae623-c0f2-4b4d-bf57-ec466b9a7672,
  abstract     = {<p>The fragmentation functions of quarks and gluons are measured in various three-jet topologies in Z decays from the full data set collected with the DELPHI detector at the Z resonance between 1992 and 995. The results at different values of transverse momentum-like scales are compared. A parameterization of the quark and gluon fragmentation functions at a fixed reference scale is given. The quark and gluon fragmentation functions show the predicted pattern of scaling violations. The scaling violation for quark jets as a function of a transverse momentum-like scale is in a good agreement with that observed in lower energy e<sup>+</sup>e<sup>-</sup> annihilation experiments. For gluon jets it appears to be significantly stronger. The scale dependences of the gluon and quark fragmentation functions agree with the prediction of the DGLAP evolution equations from which the colour factor ratio C<sub>A</sub>/C<sub>F</sub> is measured to be: C<sub>A</sub>/C<sub>F</sub> = 2.26 ± 0.09<sub>stat.</sub> ± 0.06<sub>sys.</sub> ± 0.12<sub>clus.,scale.</sub>.</p>},
  author       = {Abreu, P. and Adam, W. and Adye, T. and Adzic, P. and Albrecht, Z. and Alderweireld, T. and Alekseev, G. D. and Alemany, R. and Allmendinger, T. and Allport, P. P. and Almehed, S. and Amaldi, U. and Amapane, N. and Amato, S. and Anassontzis, E. G. and Andersson, P. and Andreazza, A. and Andringa, S. and Antilogus, P. and Apel, W. D. and Arnoud, Y. and Åsman, B. and Augustin, J. E. and Augustinus, A. and Baillon, P. and Bambade, P. and Barao, F. and Barbiellini, G. and Barbier, R. and Bardin, D. Y. and Barker, G. and Baroncelli, A. and Battaglia, M. and Baubillier, M. and Becks, K. H. and Begalli, M. and Behrmann, A. and Beilliere, P. and Belokopytov, Y. and Belous, K. and Benekos, N. C. and Benvenuti, A. C. and Berat, C. and Berggren, M. and Bertini, D. and Bertrand, D. and Besancon, M. and Bigi, M. and Bilenky, M. S. and Bizouard, M. A. and Bloch, D. and Blom, H. M. and Bonesini, M. and Bonivento, W. and Boonekamp, M. and Booth, P. S.L. and Borgland, A. W. and Borisov, G. and Bosio, C. and Botner, O. and Boudinov, E. and Bouquet, B. and Bourdarios, C. and Bowcock, T. J.V. and Boyko, I. and Bozovic, I. and Bozzo, M. and Bracko, M. and Branchini, P. and Brenner, R. A. and Bruckman, P. and Brunet, J. M. and Bugge, L. and Buran, T. and Buschbeck, B. and Buschmann, P. and Cabrera, S. and Caccia, M. and Calvi, M. and Camporesi, T. and Canale, V. and Carena, F. and Carroll, L. and Caso, C. and Castillo Gimenez, M. V. and Cattai, A. and Cavallo, F. R. and Chabaud, V. and Chapkin, M. and Charpentier, Ph and Chaussard, L. and Checchia, P. and Chelkov, G. A. and Chierici, R. and Chliapnikov, P. and Chochula, P. and Chorowicz, V. and Chudoba, J. and Cieslik, K. and Collins, P. and Contri, R. and Cortina, E. and Cosme, G. and Cossutti, F. and Crawley, H. B. and Crennell, D. and Crepe, S. and Crosetti, G. and Cuevas Maestro, J. and Czellar, S. and Davenport, M. and Da Silva, W. and Della Ricca, G. and Delpierre, P. and Demaria, N. and De Angelis, A. and De Boer, W. and De Clercq, C. and De Lotto, B. and De Min, A. and De Paula, L. and Dijkstra, H. and Di Ciaccio, L. and Dolbeau, J. and Doroba, K. and Dracos, M. and Drees, J. and Dris, M. and Duperrin, A. and Durand, J. D. and Eigen, G. and Ekelof, T. and Ekspong, G. and Ellert, M. and Elsing, M. and Engel, J. P. and Espirito Santo, M. and Fanourakis, G. and Fassouliotis, D. and Fayot, J. and Feindt, M. and Ferrari, P. and Ferrer, A. and Ferrer-Ribas, E. and Ferro, F. and Fichet, S. and Firestone, A. and Flagmeyer, U. and Foeth, H. and Fokitis, E. and Fontanelli, F. and Franek, B. and Frodesen, A. G. and Fruhwirth, R. and Fulda-Quenzer, F. and Fuster, J. and Galloni, A. and Gamba, D. and Gamblin, S. and Gandelman, M. and Garcia, C. and Gaspar, C. and Gaspar, M. and Gasparini, U. and Gavillet, Ph and Gazis, E. N. and Gele, D. and Ghodbane, N. and Gil, I. and Glege, F. and Gokieli, R. and Golob, B. and Gomez-Ceballos, G. and Goncalves, P. and Gonzalez Caballero, I. and Gopal, G. and Gorn, L. and Gouz, Y. and Gracco, V. and Grahl, J. and Graziani, E. and Gris, P. and Grosdidier, G. and Grzelak, K. and Guy, J. and Hahn, F. and Hahn, S. and Haider, S. and Hallgren, A. and Hamacher, K. and Hansen, J. and Harris, F. J. and Hedberg, V. and Heising, S. and Hernandez, J. J. and Herquet, P. and Herr, H. and Hessing, T. L. and Heuser, J. M. and Higon, E. and Holmgren, S. O. and Holt, P. J. and Hoorelbeke, S. and Houlden, M. and Hrubec, J. and Huber, M. and Huet, K. and Hughes, G. J. and Hultqvist, K. and Jackson, J. N. and Jacobsson, R. and Jalocha, P. and Janik, R. and Jarlskog, Ch and Jarlskog, G. and Jarry, P. and Jean-Marie, B. and Jeans, D. and Johansson, E. K. and Jonsson, P. and Joram, C. and Juillot, P. and Jungermann, L. and Kapusta, F. and Karafasoulis, K. and Katsanevas, S. and Katsoufis, E. C. and Keranen, R. and Kernel, G. and Kersevan, B. P. and Khomenko, B. A. and Khovanski, N. N. and Kiiskinen, A. and King, B. and Kinvig, A. and Kjaer, N. J. and Klapp, O. and Klein, H. and Kluit, P. and Kokkinias, P. and Kostioukhine, V. and Kourkoumelis, C. and Kouznetsov, O. and Krammer, M. and Kriznic, E. and Krumstein, Z. and Kubinec, P. and Kurowska, J. and Kurvinen, K. and Lamsa, J. W. and Lane, D. W. and Langefeld, P. and Lapin, V. and Laugier, J. P. and Lauhakangas, R. and Leder, G. and Ledroit, F. and Lefebure, V. and Leinonen, L. and Leisos, A. and Leitner, R. and Lemonne, J. and Lenzen, G. and Lepeltier, V. and Lesiak, T. and Lethuillier, M. and Libby, J. and Liebig, W. and Liko, D. and Lipniacka, A. and Lippi, I. and Loerstad, B. and Loken, J. G. and Lopes, J. H. and Lopez, J. M. and Lopez-Fernandez, R. and Loukas, D. and Lutz, P. and Lyons, L. and MacNaughton, J. and Mahon, J. R. and Maio, A. and Malek, A. and Malmgren, T. G.M. and Maltezos, S. and Malychev, V. and Mandl, F. and Marco, J. and Marco, R. and Marechal, B. and Margoni, M. and Marin, J. C. and Mariotti, C. and Markou, A. and Martinez-Rivero, C. and Martinez-Vidal, F. and Marti i Garcia, S. and Masik, J. and Mastroyiannopoulos, N. and Matorras, F. and Matteuzzi, C. and Matthiae, G. and Mazzucato, F. and Mazzucato, M. and Mc Cubbin, M. and Mc Kay, R. and Mc Nulty, R. and Mc Pherson, G. and Meroni, C. and Meyer, W. T. and Migliore, E. and Mirabito, L. and Mitaroff, W. A. and Mjoernmark, U. and Moa, T. and Moch, M. and Moeller, R. and Moenig, K. and Monge, M. R. and Moreau, X. and Morettini, P. and Morton, G. and Mueller, U. and Muenich, K. and Mulders, M. and Mulet-Marquis, C. and Muresan, R. and Murray, W. J. and Muryn, B. and Myatt, G. and Myklebust, T. and Naraghi, F. and Nassiakou, M. and Navarria, F. L. and Navas, S. and Nawrocki, K. and Negri, P. and Neufeld, N. and Nicolaidou, R. and Nielsen, B. S. and Niezurawski, P. and Nikolenko, M. and Nomokonov, V. and Nygren, A. and Obraztsov, V. and Olshevski, A. G. and Onofre, A. and Orava, R. and Orazi, G. and Osterberg, K. and Ouraou, A. and Paganoni, M. and Paiano, S. and Pain, R. and Paiva, R. and Palacios, J. and Palka, H. and Papadopoulou, T. D. and Papageorgiou, K. and Pape, L. and Parkes, C. and Parodi, F. and Parzefall, U. and Passeri, A. and Passon, O. and Pavel, T. and Pegoraro, M. and Peralta, L. and Pernicka, M. and Perrotta, A. and Petridou, C. and Petrolini, A. and Phillips, H. T. and Pierre, F. and Pimenta, M. and Piotto, E. and Podobnik, T. and Pol, M. E. and Polok, G. and Poropat, P. and Pozdniakov, V. and Privitera, P. and Pukhaeva, N. and Pullia, A. and Radojicic, D. and Ragazzi, S. and Rahmani, H. and Rames, J. and Ratoff, P. N. and Read, A. L. and Rebecchi, P. and Redaelli, N. G. and Regler, M. and Rehn, J. and Reid, D. and Reinhardt, R. and Renton, P. B. and Resvanis, L. K. and Richard, F. and Ridky, J. and Rinaudo, G. and Ripp-Baudot, I. and Rohne, O. and Romero, A. and Ronchese, P. and Rosenberg, E. I. and Rosinsky, P. and Roudeau, P. and Rovelli, T. and Royon, Ch and Ruhlmann-Kleider, V. and Ruiz, A. and Saarikko, H. and Sacquin, Y. and Sadovsky, A. and Sajot, G. and Salt, J. and Sampsonidis, D. and Sannino, M. and Schwemling, Ph and Schwering, B. and Schwickerath, U. and Scuri, F. and Seager, P. and Sedykh, Y. and Segar, A. M. and Seibert, N. and Sekulin, R. and Shellard, R. C. and Siebel, M. and Simard, L. and Simonetto, F. and Sisakian, A. N. and Smadja, G. and Smirnova, O. and Smith, G. R. and Sokolov, A. and Solovianov, O. and Sopczak, A. and Sosnowski, R. and Spassov, T. and Spiriti, E. and Squarcia, S. and Stanescu, C. and Stanic, S. and Stanitzki, M. and Stevenson, K. and Stocchi, A. and Strauss, J. and Strub, R. and Stugu, B. and Szczekowski, M. and Szeptycka, M. and Tabarelli, T. and Taffard, A. and Tegenfeldt, F. and Terranova, F. and Thomas, J. and Timmermans, J. and Tinti, N. and Tkatchev, L. G. and Tobin, M. and Todorova, S. and Tomaradze, A. and Tome, B. and Tonazzo, A. and Tortora, L. and Tortosa, P. and Transtromer, G. and Treille, D. and Tristram, G. and Trochimczuk, M. and Troncon, C. and Turluer, M. L. and Tyapkin, I. A. and Tzamarias, S. and Ullaland, O. and Uvarov, V. and Valenti, G. and Vallazza, E. and Vander Velde, C. and Van Dam, P. and Van den Boeck, W. and Van Doninck, W. K. and Van Eldik, J. and Van Lysebetten, A. and van Remortel, N. and Van Vulpen, I. and Vegni, G. and Ventura, L. and Venus, W. and Verbeure, F. and Verlato, M. and Vertogradov, L. S. and Verzi, V. and Vilanova, D. and Vitale, L. and Vlasov, E. and Vodopyanov, A. S. and Voulgaris, G. and Vrba, V. and Wahlen, H. and Walck, C. and Washbrook, A. J. and Weiser, C. and Wicke, D. and Wickens, J. H. and Wilkinson, G. R. and Winter, M. and Witek, M. and Wolf, G. and Yi, J. and Yushchenko, O. and Zaitsev, A. and Zalewska, A. and Zalewski, P. and Zavrtanik, D. and Zevgolatakos, E. and Zimin, N. I. and Zintchenko, A. and Zoller, Ph and Zucchelli, G. C. and Zumerle, G.},
  issn         = {1434-6044},
  language     = {eng},
  number       = {4},
  pages        = {573--589},
  publisher    = {Springer},
  series       = {European Physical Journal C},
  title        = {Measurement of the gluon fragmentation function and a comparison of the scaling violation in gluon and quark jets},
  url          = {http://dx.doi.org/10.1007/s100520000313},
  volume       = {13},
  year         = {2000},
}