| Autor: |
Abdallah, J. Abreu, P. Adam, W. Adzic, P. Albrecht, T. and Alemany-Fernandez, R. Allmendinger, T. Allport, P. P. and Amaldi, U. Amapane, N. Amato, S. Anashkin, E. Andreazza, A. Andringa, S. Anjos, N. Antilogus, P. Apel, W. -D. and Arnoud, Y. Ask, S. Asman, B. Augustin, J. E. Augustinus, A. Baillon, P. Ballestrero, A. Bambade, P. Barbier, R. and Bardin, D. Barker, G. J. Baroncelli, A. Battaglia, M. and Baubillier, M. Becks, K. -H. Begalli, M. Behrmann, A. and Ben-Haim, E. Benekos, N. Benvenuti, A. Berat, C. and Berggren, M. Berntzon, L. Bertrand, D. Besancon, M. and Besson, N. Bloch, D. Blom, M. Bluj, M. Bonesini, M. and Boonekamp, M. Booth, P. S. L. Borisov, G. Botner, O. and Bouquet, B. Bowcock, T. J. V. Boyko, I. Bracko, M. and Brenner, R. Brodet, E. Bruckman, P. Brunet, J. M. and Buschbeck, B. Buschmann, P. Calvi, M. Camporesi, T. and Canale, V. Carena, F. Castro, N. Cavallo, F. Chapkin, M. and Charpentier, Ph. Checchia, P. Chierici, R. Chliapnikov, P. Chudoba, J. Chung, S. U. Cieslik, K. Collins, P. and Contri, R. Cosme, G. Cossutti, F. Costa, M. J. Crennell, D. Cuevas, J. D'Hondt, J. Dalmau, J. da Silva, T. Da Silva, W. Della Ricca, G. De Angelis, A. De Boer, W. De Clercq, C. De Lotto, B. De Maria, N. De Min, A. de Paula, L. Di Ciaccio, L. Di Simone, A. Doroba, K. Drees, J. Eigen, G. Ekelof, T. Ellert, M. Elsing, M. and Espirito Santo, M. C. Fanourakis, G. Fassouliotis, D. and Feindt, M. Fernandez, J. Ferrer, A. Ferro, F. Flagmeyer, U. Foeth, H. Fokitis, E. Fulda-Quenzer, F. Fuster, J. and Gandelman, M. Garcia, C. Gavillet, Ph. Gazis, E. and Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. and Graziani, E. Grosdidier, G. Grzelak, K. Guy, J. Haag, C. and Hallgren, A. Hamacher, K. Hamilton, K. Haug, S. and Hauler, F. Hedberg, V. Hennecke, M. Herr, H. Hoffman, J. and Holmgren, S. -O. Holt, P. J. Houlden, M. A. Jackson, J. N. Jarlskog, G. Jarry, P. Jeans, D. Johansson, E. K. and Johansson, P. D. Jonsson, P. Joram, C. Jungermann, L. and Kapusta, F. Katsanevas, S. Katsoufis, E. Kernel, G. and Kersevan, B. P. Kerzel, U. King, B. T. Kjaer, N. J. and Kluit, P. Kokkinias, P. Kourkoumelis, C. Kouznetsov, O. and Krumstein, Z. Kucharczyk, M. Lamsa, J. Leder, G. and Ledroit, F. Leinonen, L. Leitner, R. Lemonne, J. and Lepeltier, V. Lesiak, T. Liebig, W. Liko, D. Lipniacka, A. Lopes, J. H. Lopez, J. M. Loukas, D. Lutz, P. and Lyons, L. MacNaughton, J. Malek, A. Maltezos, S. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. and Marin, J. -C. Mariotti, C. Markou, A. Martinez-Rivero, C. and Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Mazzucato, F. Mazzucato, M. Mc Nulty, R. Meroni, C. and Migliore, E. Mitaroff, W. Mjoernmark, U. Moa, T. and Moch, M. Moenig, K. Monge, R. Montenegro, J. Moraes, D. and Moreno, S. Morettini, P. Mueller, U. Muenich, K. and Mulders, M. Mundim, L. Murray, W. Muryn, B. Myatt, G. and Myklebust, T. Nassiakou, M. Navarria, F. Nawrocki, K. and Nicolaidou, R. Nikolenko, M. Oblakowska-Mucha, A. and Obraztsov, V. Olshevski, A. Onofre, A. Orava, R. and Osterberg, K. Ouraou, A. Oyanguren, A. Paganoni, M. and Paiano, S. Palacios, J. P. Palka, H. Papadopoulou, Th. D. and Pape, L. Parkes, C. Parodi, F. Parzefall, U. and Passeri, A. Passon, O. Peralta, L. Perepelitsa, V. and Perrotta, A. Petrolini, A. Piedra, J. Pieri, L. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Poireau, V. and Pol, M. E. Polok, G. Pozdniakov, V. Pukhaeva, N. Pullia, A. Rames, J. Read, A. Rebecchi, P. Rehn, J. Reid, D. and Reinhardt, R. Renton, P. Richard, F. Ridky, J. and Rivero, M. Rodriguez, D. Romero, A. Ronchese, P. and Roudeau, P. Rovelli, T. Ruhlmann-Kleider, V. Ryabtchikov, D. and Sadovsky, A. Salmi, L. Salt, J. Sander, C. and Savoy-Navarro, A. Schwickerath, U. Sekulin, R. Siebel, M. and Sisakian, A. Smadja, G. Smirnova, O. Sokolov, A. and Sopczak, A. Sosnowski, R. Spassov, T. Stanitzki, M. and Stocchi, A. Strauss, J. Stugu, B. Szczekowski, M. and Szeptycka, M. Szumlak, T. Tabarelli, T. Taffard, A. C. and Tegenfeldt, F. Timmermans, J. Tkatchev, L. Tobin, M. and Todorovova, S. Tome, B. Tonazzo, A. Tortosa, P. and Travnicek, P. Treille, D. Tristram, G. Trochimczuk, M. and Troncon, C. Turluer, M. -L. Tyapkin, I. A. Tyapkin, P. and Tzamarias, S. Uvarov, V. Valenti, G. Van Dam, P. Van Eldik, J. van Remortel, N. Van Vulpen, I. Vegni, G. and Veloso, F. Venus, W. Verdier, P. Verzi, V. Vilanova, D. and Vitale, L. Vrba, V. Wahlen, H. Washbrook, A. J. and Weiser, C. Wicke, D. Wickens, J. Wilkinson, G. Winter, M. Witek, M. Yushchenko, O. Zalewska, A. Zalewski, P. and Zavrtanik, D. Zhuravlov, V. Zimin, N. I. Zintchenko, A. and Zupan, M. DELPHI Collaboration |
| Jazyk: |
angličtina |
| Rok vydání: |
2006 |
| Předmět: |
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| Popis: |
The study of quark jets in e(+)e(-) reactions at LEP has demonstrated that the hadronisation process is reproduced well by the Lund string model. However. our understanding of gluon fragmentation is less complete. In this study enriched quark and gluon jet samples of different purities are selected in three-jet events from hadronic decays of the Z collected by the DELPHI experiment in the LEP runs during 1994 and 1995. The leading systems of the two kinds of jets are defined by requiring a rapidity gap and their sum of charges is studied. An excess of leading systems with total charge zero is found for gluon jets in all cases, when compared to Monte Carlo simulations with JETSET (with and without Bose-Einstein correlations included) and ARIADNE. The corresponding leading systems of quark jets do not exhibit such an excess. The influence of the gap size and of the gluon purity on the effect is studied and a concentration of the excess of neutral leading systems at low invariant masses (less than or similar to 2 GeV/c(2)) is observed, indicating that gluon jets might have an additional hitherto undetected fragmentation mode via a two-gluon system. This could be an indication of a possible production of gluonic states as predicted by QCD. (c) 2006 Elsevier B.V. All rights reserved. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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