Study of leading hadrons in gluon and quark fragmentation
(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)
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- published
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- Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics
- volume
- 643
- issue
- 3-4
- pages
- 147 - 157
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- Elsevier
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- wos:000242906900002
- scopus:33751370150
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- 0370-2693
- DOI
- 10.1016/j.physletb.2006.10.040
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- English
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@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. 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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}}, doi = {{10.1016/j.physletb.2006.10.040}}, volume = {{643}}, year = {{2006}}, }