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Journal Articles Physics Letters B Year : 2006

Study of leading hadrons in gluon and quark fragmentation

J. Abdallah , P. Abreu , W. Adam , P. Adzic , T. Albrecht , T. Alderweireld , R. Alemany-Fernandez , T. Allmendinger , P. P. Allport , U. Amaldi , N. Amapane , S. Amato , E. Anashkin , A. Andreazza , S. Andringa , N. Anjos , P. Antilogus , W. D. Apel , Y. Arnoud , S. Ask , B. Åsman , J. E. Augustin , A. Augustinus , P. Baillon , A. Ballestrero , P. Bambade , R. Barbier , D. Bardin , G. J. Barker , A. Baroncelli , M. Battaglia , M. Baubillier , K. H. Becks , M. Begalli , A. Behrmann , E. Ben-Haim , N. Benekos , A. Benvenuti , C. Bérat , M. Berggren , L. Berntzon , D. Bertrand , M. Besançon , N. Besson , D. Bloch , M. Blom , M. Bluj , M. Bonesini , M. Boonekamp , P. S. L. Booth , G. Borisov , O. Botner , B. Bouquet , T. J. V. Bowcock , I. Boyko , M. Bracko , R. Brenner , E. Brodet , P. Brückman , J. M. Brunet , B. Buschbeck , P. Buschmann , M. Calvi , T. Camporesi , V. Canale , F. Carena , N. Castro , F. Cavallo , M. Chapkin , P. Charpentier , P. Checchia , R. Chierici , P. Shlyapnikov , J. Chudoba , S. U. Chung , K. Cieslik , P. Collins , R. Contri , G. Cosme , F. Cossutti , M. J. Costa , D. J. Crennell , J. Cuevas-Maestro , J. d'Hondt , J. Dalmau , T. da Silva , W. da Silva , G. Della Ricca , A. de Angelis , W. de Boer , C. de Clercq , B. de Lotto , N. de Maria , Min A. De , L. de Paula , L. Di Ciaccio , A. Di Simone , K. Doroba , J. Drees , G. Eigen , Tord Johan Carl Ekelöf , M. Ellert , M. Elsing , M. C. Espirito-Santo , G. K. Fanourakis , D. Fassouliotis , M. Feindt , J. Fernández , A. Ferrer , F. Ferro , U. Flagmeyer , H. Föth , E. Fokitis , F. Fulda-Quenzer , J. Fuster , M. Gandelman , C. García , P. Gavillet , E. Gazis , R. Gokieli , B. Golob , G. Gómez-Ceballos , Paulo Gonçalves , E. Graziani , G. Grosdidier , K. Grzelak , J. Guy , C. Haag , A. Hallgren , K. Hamacher , K. Hamilton , S. Haug , F. Hauler , V. Hedberg , M. Hennecke , H. Herr , Jakobus Hoffman , S. O. Holmgren , P. J. Holt , M. A. Houlden , K. Hultqvist , J. N. Jackson , G. Jarlskog , P. Jarry , D. Jeans , E. K. Johansson , P. D. Johansson , P. Jonsson , C. Joram , L. Jungermann , F. Kapusta , S. Katsanevas , E. Katsoufis , G. Kernel , B. P. Kersevan , U. Kerzel , B. T. King , N. J. Kjaer , P. Kluit , P. Kokkinias , C. Kourkoumelis , O. Kuznetsov , Z. Krumshtein , M. Kucharczyk , J. Lamsa , G. Leder , F. Ledroit , L. Leinonen , R. Leitner , J. Lemonne , V. Lepeltier , T. Lesiak , W. Liebig , D. Liko , A. Lipniacka , J. H. Lopes , J. M. López , D. Loukas , P. Lutz , L. Lyons , J. Macnaughton , A. Malek , S. Maltezos , F. Mandl , J. Marco , R. Marco , B. Maréchal , M. Margoni , J. C. Marin , C. Mariotti , A. Markou , C. Martínez-Rivero , J. Masik , N. Mastroyiannopoulos , F. Matorras , C. Matteuzzi , F. Mazzucato , M. Mazzucato , R. Mcnulty , C. Meroni , E. Migliore , W.A. Mitaroff , U. Mjörnmark , T. Moa , M. Moch , K. Mönig , R. Monge , J. Montenegro , D. Moraes , S. Moreno , P. Morettini , U. Müller , K. Münich , M. Mulders , L. Mundim , W. Murray , B. Muryn , G. Myatt , T. Myklebust , M. Nassiakou , F. Navarria , K. Nawrocki , R. Nicolaidou , M. Nikolenko , A. Oblakowska-Mucha , V. F. Obraztsov , A. Olshevski , A. Onofre , R. Orava , K. Österberg , A. Ouraou , A. Oyanguren , M. Paganoni , S. Paiano , J. P. Palacios , H. Palka , T. D. Papadopoulou , L. Pape , C. Parkes , F. Parodi , U. Parzefall , A. Passeri , O. Passon , L. Peralta , V. Perepelitsa , A. Perrotta , A. Petrolini , J. Piedra , L. Pieri , F. Pierre , M. Pimenta , E. Piotto , T. Podobnik , V. Poireau , M. E. Pol , G. Polok , V. Pozdnyakov , N. Pukhaeva , A. Pullia , J. Rames , A. Read , P. Rebecchi , J. Rehn , D. Reid , R. Reinhardt , P. B. Renton , F. Richard , J. Rídky , M. Rivero , D. Rodríguez , A. Romero , P. Ronchese , P. Roudeau , T. Rovelli , V. Ruhlmann-Kleider , D. Ryabtchikov , A. Sadowsky , L. Salmi , J. Salt , C. Sander , A. Savoy-Navarro (1) , U. Schwickerath , R. Sekulin , M. Siebel , A. Sisakian , G. Smadja (2) , O. Smirnova , A. Sokolov , A. Sopczak , R. Sosnowski , T. Spassoff , M. Stanitzki , A. Stocchi , J. Strauss , B. Stugu , M. Szczekowski , M. Szeptycka , T. Szumlak , T. Tabarelli , A. C. Taffard , F. Tegenfeldt , J. Timmermans , L. Tkatchev , M. Tobin , S. Todorovova , B. Tomé , A. Tonazzo , Pablo Tortosa , P. Travnicek , D. Treille , G. Tristram , M. Trochimczuk , C. Troncon , M. L. Turluer (3) , I. A. Tyapkin , P. Tyapkin , S. Tzamarias , V. Uvarov , G. Valenti , P. van Dam , J. van Eldik , N. van Remortel , I. van Vulpen , G. Vegni , F. Veloso , W. Venus , P. Verdier (2) , V. Verzi , D. Vilanova (3) , L. Vitale , V. Vrba , H. Wahlen , C. Walck , A. J. Washbrook , C. Weiser , D. Wicke , J. Wickens , G. Wilkinson , M. Winter (4) , M. Witek , O. Yushchenko , A. Zalewska , P. Zalewski , D. Zavrtanik , V. Zhuravlov , N. I. Zimin , A. Zintchenko , M. Zupan
J. Abdallah
  • Function : Author
P. Abreu
  • Function : Author
W. Adam
  • Function : Author
P. Adzic
  • Function : Author
T. Albrecht
  • Function : Author
T. Alderweireld
  • Function : Author
R. Alemany-Fernandez
  • Function : Author
T. Allmendinger
  • Function : Author
P. P. Allport
  • Function : Author
U. Amaldi
  • Function : Author
N. Amapane
  • Function : Author
S. Amato
  • Function : Author
E. Anashkin
  • Function : Author
A. Andreazza
  • Function : Author
S. Andringa
  • Function : Author
N. Anjos
  • Function : Author
P. Antilogus
W. D. Apel
  • Function : Author
Y. Arnoud
  • Function : Author
S. Ask
  • Function : Author
B. Åsman
  • Function : Author
J. E. Augustin
  • Function : Author
A. Augustinus
  • Function : Author
P. Baillon
  • Function : Author
A. Ballestrero
  • Function : Author
P. Bambade
  • Function : Author
R. Barbier
  • Function : Author
D. Bardin
  • Function : Author
G. J. Barker
  • Function : Author
A. Baroncelli
  • Function : Author
M. Battaglia
  • Function : Author
M. Baubillier
  • Function : Author
K. H. Becks
  • Function : Author
M. Begalli
  • Function : Author
A. Behrmann
  • Function : Author
E. Ben-Haim
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N. Benekos
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A. Benvenuti
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C. Bérat
M. Berggren
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L. Berntzon
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D. Bertrand
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M. Besançon
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N. Besson
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D. Bloch
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M. Blom
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M. Bluj
  • Function : Author
M. Bonesini
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M. Boonekamp
  • Function : Author
P. S. L. Booth
  • Function : Author
G. Borisov
O. Botner
  • Function : Author
B. Bouquet
  • Function : Author
T. J. V. Bowcock
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I. Boyko
M. Bracko
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R. Brenner
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E. Brodet
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P. Brückman
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J. M. Brunet
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B. Buschbeck
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P. Buschmann
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M. Calvi
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T. Camporesi
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V. Canale
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F. Carena
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N. Castro
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F. Cavallo
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M. Chapkin
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P. Charpentier
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P. Checchia
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R. Chierici
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P. Shlyapnikov
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J. Chudoba
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S. U. Chung
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K. Cieslik
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P. Collins
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R. Contri
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G. Cosme
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F. Cossutti
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M. J. Costa
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D. J. Crennell
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J. Cuevas-Maestro
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J. d'Hondt
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J. Dalmau
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T. da Silva
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W. da Silva
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G. Della Ricca
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A. de Angelis
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W. de Boer
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C. de Clercq
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B. de Lotto
N. de Maria
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Min A. De
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L. de Paula
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L. Di Ciaccio
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A. Di Simone
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K. Doroba
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J. Drees
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G. Eigen
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Tord Johan Carl Ekelöf
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M. Ellert
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M. Elsing
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M. C. Espirito-Santo
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G. K. Fanourakis
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D. Fassouliotis
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M. Feindt
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J. Fernández
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A. Ferrer
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F. Ferro
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U. Flagmeyer
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H. Föth
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E. Fokitis
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F. Fulda-Quenzer
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J. Fuster
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M. Gandelman
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C. García
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P. Gavillet
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E. Gazis
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R. Gokieli
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B. Golob
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G. Gómez-Ceballos
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Paulo Gonçalves
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E. Graziani
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G. Grosdidier
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K. Grzelak
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J. Guy
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C. Haag
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A. Hallgren
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K. Hamacher
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K. Hamilton
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S. Haug
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F. Hauler
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V. Hedberg
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M. Hennecke
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H. Herr
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Jakobus Hoffman
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S. O. Holmgren
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M. A. Houlden
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J. N. Jackson
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G. Jarlskog
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M. Nikolenko
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A. Oblakowska-Mucha
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J. P. Palacios
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F. Pierre
M. Pimenta
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T. Podobnik
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V. Poireau
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M. E. Pol
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N. Pukhaeva
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A. Read
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J. Rehn
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A. Sadowsky
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L. Salmi
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U. Schwickerath
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M. Siebel
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T. Tabarelli
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A. C. Taffard
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J. Timmermans
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L. Tkatchev
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M. Tobin
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S. Todorovova
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B. Tomé
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A. Tonazzo
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Pablo Tortosa
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P. Travnicek
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D. Treille
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G. Tristram
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M. Trochimczuk
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C. Troncon
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I. A. Tyapkin
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P. Tyapkin
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S. Tzamarias
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V. Uvarov
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G. Valenti
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P. van Dam
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J. van Eldik
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N. van Remortel
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I. van Vulpen
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G. Vegni
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F. Veloso
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W. Venus
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P. Verdier
V. Verzi
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L. Vitale
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V. Vrba
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H. Wahlen
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C. Walck
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A. J. Washbrook
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C. Weiser
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D. Wicke
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J. Wickens
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G. Wilkinson
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M. Witek
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O. Yushchenko
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A. Zalewska
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P. Zalewski
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D. Zavrtanik
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V. Zhuravlov
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N. I. Zimin
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A. Zintchenko
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M. Zupan
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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 (<~ 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.

Dates and versions

in2p3-00107079 , version 1 (17-10-2006)

Identifiers

Cite

J. Abdallah, P. Abreu, W. Adam, P. Adzic, T. Albrecht, et al.. Study of leading hadrons in gluon and quark fragmentation. Physics Letters B, 2006, 643, pp.147-157. ⟨10.1016/j.physletb.2006.10.040⟩. ⟨in2p3-00107079⟩
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