Rapidity-alignment and p(T) compensation of particle pairs in hadronic Z(0) decays

Summary, in English

Observation is made of rapidity-alignment of K+K- and (p) over barp pairs which results from their asymmetric orientation in rapidity, with respect to the direction from primary quark to antiquark. The K+K- and (p) over barp data are consistent with predictions from the fragmentation string model. However, the (p) over barp data strongly disagree with the conventional implementation of the cluster model. The non-perturbative process of 'gluon splitting to diquarks' has to be incorporated into the cluster model for it to agree with the data. Local conservation of PT between particles nearby in rapidity (i.e., p(T) compensation) is analysed with respect to the thrust direction for pi(+)pi(-), K+K-, and (p) over barp pairs. In this case, the string model provides fair agreement with the data. The cluster model is incompatible with the data for all three particle pairs. The model with its central premiss of isotropically-decaying clusters predicts a p(T) correlation not seen in the data. (C) 2002 Elsevier Science B.V. All rights reserved.

• Author: J Abdallah; P Abreu; W Adam; P Adzic; T Albrecht; T Alderweireld; R Alemany-Fernandez; T Allmendinger; PP Allport; Sverker Almehed; U Amaldi; N Amapane; S Amato; E Anashkin; A Andreazza; S Andringa; N Anjos; P Antilogus; WD Apel; Y Arnoud; Stefan Ask; B Asman; JE Augustin; A Augustinus; P Baillon; A Ballestrero; P Bambade; R Barbier; D Bardin; G Barker; A Baroncelli; M Battaglia; M Baubillier; KH Becks; M Begalli; A Behrmann; T Bellunato; N Benekos; A Benvenuti; C Berat; M Berggren; L Berntzon; D Bertrand; M Besancon; N Besson; D Bloch; M Blom; M Bonesini; M Boonekamp; PSL Booth; G Borisov; O Botner; B Bouquet; TJV Bowcock; I Boyko; M Bracko; R Brenner; E Brodet; J Brodzicka; P Bruckman; JM Brunet; L Bugge; P Buschmann; M Calvi; T Camporesi; V Canale; F Carena; C Carimalo; N Castro; F Cavallo; M Chapkin; P Charpentier; P Checchia; R Chierici; P Chliapnikov; SU Chung; K Cieslik; P Collins; R Contri; G Cosme; F Cossutti; MJ Costa; B Crawley; D Crennell; J Cuevas; 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; A De Min; L de Paula; L Di Ciaccio; A Di Simone; K Doroba; J Drees; M Dris; G Eigen; T Ekelof; M Ellert; M Elsing; MCE Santo; G Fanourakis; D Fassouliotis; M Feindt; J Fernandez; A Ferrer; F Ferro; U Flagmeyer; H Foeth; E Fokitis; F Fulda-Quenzer; J Fuster; M Gandelman; C Garcia; P Gavillet; E Gazis; D Gele; T Geralis; R Gokieli; B Golob; G Gomez-Ceballos; P Goncalves; E Graziani; G Grosdidier; K Grzelak; J Guy; C Haag; F Hahn; S Hahn; A Hallgren; K Hamacher; K Hamilton; J Hansen; S Haug; F Hauler; Vincent Hedberg; M Hennecke; H Herr; SO Holmgren; PJ Holt; MA Houlden; K Hultqvist; JN Jackson; P Jalocha; Christina Jarlskog; Göran Jarlskog; P Jarry; D Jeans; EK Johansson; PD Johansson; P Jonsson; C Joram; L Jungermann; F Kapusta; S Katsanevas; E Katsoufis; R Keranen; G Kernel; BP Kersevan; A Kiiskinen; BT King; NJ Kjaer; P Kluit; P Kokkinias; C Kourkoumelis; O Kouznetsov; Z Krumstein; M Kucharczyk; J Kurowska; B Laforge; J Lamsa; G Leder; F Ledroit; L Leinonen; R Leitner; J Lemonne; G Lenzen; V Lepeltier; T Lesiak; W Liebig; D Liko; A Lipniacka; JH Lopes; JM Lopez; D Loukas; P Lutz; L Lyons; J MacNaughton; A Malek; S Maltezos; F Mandl; J Marco; R Marco; B Marechal; M Margoni; JC Marin; C Mariotti; A Markou; C Martinez-Rivero; J Masik; N Mastroyiannopoulos; F Matorras; C Matteuzzi; F Mazzucato; M Mazzucato; R McNulty; C Meroni; WT Meyer; E Migliore; W Mitaroff; Ulf Mjörnmark; T Moa; M Moch; K Moenig; R Monge; J Montenegro; D Moraes; S Moreno; P Morettini; U Mueller; K Muenich; M Mulders; L Mundim; W Murray; B Muryn; G Myatt; T Myklebust; M Nassiakou; F Navarria; K Nawrocki; S Nemecek; R Nicolaidou; P Niezurawski; M Nikolenko; Andreas Nygren; A Oblakowska-Mucha; V Obraztsov; A Olshevski; A Onofre; R Orava; K Osterberg; A Ouraou; A Oyanguren; M Paganoni; S Paiano; JP Palacios; H Palka; TD 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; ME Pol; G Polok; P Poropat; V Pozdniakov; P Privitera; N Pukhaeva; A Pullia; J Rames; L Ramler; A Read; P Rebecchi; J Rehn; D Reid; R Reinhardt; P Renton; F Richard; J Ridky; I Ripp-Baudot; D Rodriguez; A Romero; P Ronchese; E Rosenberg; P Roudeau; T Rovelli; V Ruhlmann-Kleider; D Ryabtchikov; A Sadovsky; L Salmi; J Salt; A Savoy-Navarro; C Schwanda; B Schwering; U Schwickerath; A Segar; R Sekulin; M Siebel; A Sisakian; G Smadja; Oxana Smirnova; A Sokolov; A Sopczak; R Sosnowski; T Spassov; M Stanitzki; A Stocchi; J Strauss; B Stugu; M Szczekowski; M Szeptycka; T Szumlak; T Taberelli; AC Taffard; F Tegenfeldt; F Terranova; J Timmermans; N Tinti; L Tkatchev; M Tobin; S Todorovova; A Tomaradze; B Tome; A Tonazzo; P Tortosa; P Travnicek; D Treille; G Tristram; M Trochimczuk; C Troncon; IA Tyapkin; P Tyapkin; S Tzamarias; O Ullaland; V Uvarov; G Valenti; P Van Dam; J Van Eldik; A Van Lysebetten; N van Remortel; I Van Vulpen; G Vegni; F Veloso; W Venus; F Verbeure; P Verdier; V Verzi; D Vilanova; L Vitale; V Vrba; H Wahlen; AJ Washbrook; C Weiser; D Wicke; J Wickens; G Wilkinson; M Winter; M Witek; O Yushchenko; A Zalewska; P Zalewski; D Zavrtanik; NI Zimin; A Zintchenko; P Zoller; M Zupan
• Department/s: Particle and nuclear physics
• Publishing year: 2002
• Language: English
• Pages: 243-252
• Publication/Series: Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics
• Volume: 533
• Issue: 3-4
• Links: http://dx.doi.org/10.1016/S0370-2693(02)01658-1
• Document type: Journal article
• Publisher: Elsevier
• Topic: Subatomic Physics
• Status: Published
• ISBN/ISSN/Other: ISSN: 0370-2693