Study of leading hadrons in gluon and quark fragmentation

Επιστημονική δημοσίευση - Άρθρο Περιοδικού uoadl:3115282 19 Αναγνώσεις

Μονάδα:
Ερευνητικό υλικό ΕΚΠΑ
Τίτλος:
Study of leading hadrons in gluon and quark fragmentation
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
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.
Έτος δημοσίευσης:
2006
Συγγραφείς:
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.
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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
Περιοδικό:
PHYSICS LETTERS B
Εκδότης:
Elsevier
Τόμος:
643
Αριθμός / τεύχος:
3-4
Σελίδες:
147-157
Επίσημο URL (Εκδότης):
DOI:
10.1016/j.physletb.2006.10.040
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