Advanced

Study of leading hadrons in gluon and quark fragmentation

Abdallah, J.; Abreu, P.; Adam, W.; Adzic, P.; Albrecht, T.; Alemany-Fernandez, R.; Allmendinger, T.; Allport, P. P.; Amaldi, U. and Amapane, N., et al. (2006) In Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics 643(3-4). p.147-157
Abstract
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... (More)
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. (Less)
Please use this url to cite or link to this publication:
author
, et al. (More)
(Less)
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics
volume
643
issue
3-4
pages
147 - 157
publisher
Elsevier
external identifiers
  • wos:000242906900002
  • scopus:33751370150
ISSN
0370-2693
DOI
10.1016/j.physletb.2006.10.040
language
English
LU publication?
yes
id
08494dc5-3fa0-4394-bbc3-2aff75790384 (old id 680515)
date added to LUP
2007-12-20 09:13:57
date last changed
2019-02-20 08:23:18
@article{08494dc5-3fa0-4394-bbc3-2aff75790384,
  abstract     = {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.},
  author       = {Abdallah, J. and Abreu, P. and Adam, W. and Adzic, P. and Albrecht, T. and Alemany-Fernandez, R. and Allmendinger, T. and Allport, P. P. and Amaldi, U. and Amapane, N. and Amato, S. and Anashkin, E. and Andreazza, A. and Andringa, S. and Anjos, N. and Antilogus, P. and Apel, W. -D. and Arnoud, Y. and Ask, Stefan and Asman, B. and Augustin, J. E. and Augustinus, A. and Baillon, P. and Ballestrero, A. and Bambade, P. and Barbier, R. and Bardin, D. and Barker, G. J. and Baroncelli, A. and Battaglia, M. and Baubillier, M. and Becks, K. -H. and Begalli, M. and Behrmann, A. and Ben-Haim, E. and Benekos, N. and Benvenuti, A. and Berat, C. and Berggren, M. and Berntzon, L. and Bertrand, D. and Besancon, M. and Besson, N. and Bloch, D. and Blom, M. and Bluj, M. and Bonesini, M. and Boonekamp, M. and Booth, P. S. L. and Borisov, G. and Botner, O. and Bouquet, B. and Bowcock, T. J. V. and Boyko, I. and Bracko, M. and Brenner, R. and Brodet, E. and Bruckman, P. and Brunet, J. M. and Buschbeck, B. and Buschmann, P. and Calvi, M. and Camporesi, T. and Canale, V. and Carena, F. and Castro, N. and Cavallo, F. and Chapkin, M. and Charpentier, Ph. and Checchia, P. and Chierici, R. and Chliapnikov, P. and Chudoba, J. and Chung, S. U. and Cieslik, K. and Collins, P. and Contri, R. and Cosme, G. and Cossutti, F. and Costa, M. J. and Crennell, D. and Cuevas, J. and D'Hondt, J. and Dalmau, J. and da Silva, T. and Da Silva, W. and Della Ricca, G. and De Angelis, A. and De Boer, W. and De Clercq, C. and De Lotto, B. and De Maria, N. and De Min, A. and de Paula, L. and Di Ciaccio, L. and Di Simone, A. and Doroba, K. and Drees, J. and Eigen, G. and Ekelof, T. and Ellert, M. and Elsing, M. and Espirito Santo, M. C. and Fanourakis, G. and Fassouliotis, D. and Feindt, M. and Fernandez, J. and Ferrer, A. and Ferro, F. and Flagmeyer, U. and Foeth, H. and Fokitis, E. and Fulda-Quenzer, F. and Fuster, J. and Gandelman, M. and Garcia, C. and Gavillet, Ph. and Gazis, E. and Gokieli, R. and Golob, B. and Gomez-Ceballos, G. and Goncalves, P. and Graziani, E. and Grosdidier, G. and Grzelak, K. and Guy, J. and Haag, C. and Hallgren, A. and Hamacher, K. and Hamilton, K. and Haug, S. and Hauler, F. and Hedberg, Vincent and Hennecke, M. and Herr, H. and Hoffman, J. and Holmgren, S. -O. and Holt, P. J. and Houlden, M. A. and Jackson, J. N. and Jarlskog, Göran and Jarry, P. and Jeans, D. and Johansson, E. K. and Johansson, P. D. and Jonsson, P. and Joram, C. and Jungermann, L. and Kapusta, F. and Katsanevas, S. and Katsoufis, E. and Kernel, G. and Kersevan, B. P. and Kerzel, U. and King, B. T. and Kjaer, N. J. and Kluit, P. and Kokkinias, P. and Kourkoumelis, C. and Kouznetsov, O. and Krumstein, Z. and Kucharczyk, M. and Lamsa, J. and Leder, G. and Ledroit, F. and Leinonen, L. and Leitner, R. and Lemonne, J. and Lepeltier, V. and Lesiak, T. and Liebig, W. and Liko, D. and Lipniacka, A. and Lopes, J. H. and Lopez, J. M. and Loukas, D. and Lutz, P. and Lyons, L. and MacNaughton, J. and Malek, A. and Maltezos, S. 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 Masik, J. and Mastroyiannopoulos, N. and Matorras, F. and Matteuzzi, C. and Mazzucato, F. and Mazzucato, M. and Mc Nulty, R. and Meroni, C. and Migliore, E. and Mitaroff, W. and Mjörnmark, Ulf and Moa, T. and Moch, M. and Moenig, K. and Monge, R. and Montenegro, J. and Moraes, D. and Moreno, S. and Morettini, P. and Mueller, U. and Muenich, K. and Mulders, M. and Mundim, L. and Murray, W. and Muryn, B. and Myatt, G. and Myklebust, T. and Nassiakou, M. and Navarria, F. and Nawrocki, K. and Nicolaidou, R. and Nikolenko, M. and Oblakowska-Mucha, A. and Obraztsov, V. and Olshevski, A. and Onofre, A. and Orava, R. and Osterberg, K. and Ouraou, A. and Oyanguren, A. and Paganoni, M. and Paiano, S. and Palacios, J. P. and Palka, H. and Papadopoulou, Th. D. and Pape, L. and Parkes, C. and Parodi, F. and Parzefall, U. and Passeri, A. and Passon, O. and Peralta, L. and Perepelitsa, V. and Perrotta, A. and Petrolini, A. and Piedra, J. and Pieri, L. and Pierre, F. and Pimenta, M. and Piotto, E. and Podobnik, T. and Poireau, V. and Pol, M. E. and Polok, G. and Pozdniakov, V. and Pukhaeva, N. and Pullia, A. and Rames, J. and Read, A. and Rebecchi, P. and Rehn, J. and Reid, D. and Reinhardt, R. and Renton, P. and Richard, F. and Ridky, J. and Rivero, M. and Rodriguez, D. and Romero, A. and Ronchese, P. and Roudeau, P. and Rovelli, T. and Ruhlmann-Kleider, V. and Ryabtchikov, D. and Sadovsky, A. and Salmi, L. and Salt, J. and Sander, C. and Savoy-Navarro, A. and Schwickerath, U. and Sekulin, R. and Siebel, M. and Sisakian, A. and Smadja, G. and Smirnova, Oxana and Sokolov, A. and Sopczak, A. and Sosnowski, R. and Spassov, T. and Stanitzki, M. and Stocchi, A. and Strauss, J. and Stugu, B. and Szczekowski, M. and Szeptycka, M. and Szumlak, T. and Tabarelli, T. and Taffard, A. C. and Tegenfeldt, F. and Timmermans, J. and Tkatchev, L. and Tobin, M. and Todorovova, S. and Tome, B. and Tonazzo, A. and Tortosa, P. and Travnicek, P. and Treille, D. and Tristram, G. and Trochimczuk, M. and Troncon, C. and Turluer, M. -L. and Tyapkin, I. A. and Tyapkin, P. and Tzamarias, S. and Uvarov, V. and Valenti, G. and Van Dam, P. and Van Eldik, J. and van Remortel, N. and Van Vulpen, I. and Vegni, G. and Veloso, F. and Venus, W. and Verdier, P. and Verzi, V. and Vilanova, D. and Vitale, L. and Vrba, V. and Wahlen, H. and Washbrook, A. J. and Weiser, C. and Wicke, D. and Wickens, J. and Wilkinson, G. and Winter, M. and Witek, M. and Yushchenko, O. and Zalewska, A. and Zalewski, P. and Zavrtanik, D. and Zhuravlov, V. and Zimin, N. I. and Zintchenko, A. and Zupan, M.},
  issn         = {0370-2693},
  language     = {eng},
  number       = {3-4},
  pages        = {147--157},
  publisher    = {Elsevier},
  series       = {Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics},
  title        = {Study of leading hadrons in gluon and quark fragmentation},
  url          = {http://dx.doi.org/10.1016/j.physletb.2006.10.040},
  volume       = {643},
  year         = {2006},
}