Investigation of the splitting of quark and gluon jets

6533b7d3fe1ef96bd1260220

RESEARCH PRODUCT

Investigation of the splitting of quark and gluon jets

P Abreu W Adam T Adye P Adzic I Ajinenko G D Alekseev R Alemany P P Allport S Almehed Ugo Amaldi S Amato P Andersson A Andreazza P Antilogus W D Apel Y Arnoud B ÅSman J E Augustin A Augustinus Paul Baillon P Bambade F Barão R Barbier Dimitri Yuri Bardin G Barker A Baroncelli O Bärring M J Bates Marco Battaglia M Baubillier K H Becks M Begalli P Beillière Yu A Belokopytov K S Belous Alberto C Benvenuti C Bérat M Berggren D Bertini D Bertrand M Besançon F Bianchi M Bigi S M Bilenky P Billoir M A Bizouard D Bloch M Bonesini W Bonivento M Boonekamp P S L Booth A W Borgland G Borisov C Bosio O Botner E Boudinov B Bouquet C Bourdarios T J V Bowcock I Bozovic M Bozzo P Branchini K D Brand T Brenke R A Brenner R Brown P Brückman J M Brunet L Bugge T Buran T Burgsmüller P Buschmann S Cabrera M Caccia M Calvi A J Camacho-rozas T Camporesi V Canale M Canepa F Carena L Carroll Carlo Caso M V Castillo-gimenez A Cattai F R Cavallo C Cerruti V Chabaud M M Chapkin P Charpentier L Chaussard P Checchia G A Chelkov M Chen R Chierici P V Chliapnikov P Chochula V Chorowicz J Chudoba P Collins M Colomer R Contri E Cortina G Cosme F Cossutti J H Cowell H B Crawley D J Crennell G Crosetti J Cuevas-maestro S Czellar B D'almagne G Damgaard P D Dauncey Martyn Davenport W Da Silva A Deghorain G Della Ricca P A Delpierre N Demaria A De Angelis Wim De Boer S De Brabandere C De Clercq C De La Vaissière B De Lotto A De Min L S De Paula H Dijkstra Lucia Di Ciaccio A Di Diodato A Djannati J Dolbeau K Doroba M Dracos J Drees K A Drees M Dris A Duperrin J D Durand D M Edsall R Ehret G Eigen T J C Ekelöf Gösta Ekspong M Ellert M Elsing J P Engel B Erzen M C Espirito-santo E Falk G K Fanourakis D Fassouliotis J Fayot Michael Feindt A Fenyuk P Ferrari A Ferrer S Fichet A Firestone P A Fischer U Flagmeyer H Föth E Fokitis F Fontanelli F Formenti B J Franek A G Frodesen F Fulda-quenzer J A Fuster A Galloni D Gamba M Gandelman C García J García C Gaspar M Gaspar U Gasparini P Gavillet E N Gazis D Gelé J P Gerber N Ghodbane F Glege R Gokieli B Golob P Gonçalves I González-caballero Gian P Gopal L Gorn M Górski Valerio Gracco J Grahl E Graziani C Green A Grefrath P Gris G Grosdidier K Grzelak M Günther J Guy F Hahn S Hahn S Haider Z Hajduk A Hallgren K Hamacher F J Harris V Hedberg S Heising R P Henriques J J Hernández P Herquet H Herr T L Hessing J M Heuser E Higón S O Holmgren P J Holt D J Holthuizen S Hoorelbeke M A Houlden Josef Hrubec K Huet K Hultqvist J N Jackson R Jacobsson P Jalocha R Janik C Jarlskog G Jarlskog P Jarry B Jean-marie E K Johansson L B Jönsson P E Jönsson C Joram P Juillot F Kapusta K Karafasoulis S Katsanevas E C Katsoufis R Keränen Yu A Khokhlov B A Khomenko N N Khovanskii B J King N J Kjaer O Klapp H Klein P M Kluit D Knoblauch P Kokkinias A K Konoplyannikov M Koratzinos K Korcyl V Kostyukhin C Kourkoumelis O Kuznetsov Manfred Krammer C Kreuter I J Kronkvist Z Krumshtein P Kubinec W Kucewicz K L Kurvinen C Lacasta J Lamsa L Lanceri D W Lane P Langefeld J P Laugier R Lauhakangas Gerhard Leder F Ledroit V Lefébure C K Legan A Leisos R Leitner J Lemonne Georg Lenzen V Lepeltier T Lesiak M Lethuillier J Libby D Liko A Lipniacka I Lippi B Lörstad J G Loken J H Lopes J M López D Loukas P Lutz L Lyons J N Macnaughton G Maehlum J R Mahon A Maio A Malek T G M Malmgren V Malychev F Mandl J Marco R P Marco B Maréchal M Margoni J C Marin C Mariotti A Markou C Martínez-rivero F Martínez-vidal S Martí I García J Masik F Matorras C Matteuzzi Giorgio Matthiae F Mazzucato M Mazzucato M L Mccubbin R Mckay R Mcnulty G Mcpherson J Medbo C Meroni W T Meyer A Myagkov M Michelotto E Migliore L Mirabito Winfried A Mitaroff U Mjörnmark T Moa R Møller K Mönig M R Monge X Moreau P Morettini H Müller K Münich M Mulders L M Mundim W J Murray B Muryn Gerald Myatt T Myklebust F Naraghi Francesco Luigi Navarria S Navas K Nawrocki P Negri S Némécek N Neufeld W Neumann N Neumeister R Nicolaidou B S Nielsen M Nieuwenhuizen V Nikolaenko M Nikolenko P Niss A Nomerotski Ainsley Normand A Nygren W Oberschulte-beckmann V F Obraztsov A G Olshevskii A Onofre Risto Orava G Orazi K ÖSterberg A Ouraou P Paganini M Paganoni S Paiano R Pain R Paiva H Palka T D Papadopoulou K Papageorgiou L Pape C Parkes F Parodi U Parzefall A Passeri M Pegoraro L Peralta H Pernegger Manfred Pernicka A Perrotta C Petridou A Petrolini H T Phillips G Piana F Pierre M Pimenta E Piotto T Podobnik O Podobrin M E Pol G Polok P Poropat V Pozdnyakov P Privitera N Pukhaeva Antonio Pullia D Radojicic S Ragazzi H Rahmani P N Ratoff A L Read P Rebecchi N G Redaelli Meinhard Regler D Reid R Reinhardt P B Renton L K Resvanis F Richard J Rídky G Rinaudo O M Røhne A Romero P Ronchese E I Rosenberg P Rosinsky Patrick Roudeau T Rovelli V Ruhlmann-kleider A Ruiz H Saarikko Yu Sacquin A Sadovskii G Sajot J Salt D Sampsonidis M Sannino H Schneider U Schwickerath M A E Schyns F Scuri P Seager Yu Sedykh A M Segar R L Sekulin R C Shellard A Sheridan R Silvestre F Simonetto A N Sissakian T B Skaali G Smadja O G Smirnova G R Smith A Sokolov O Solovyanov André Sopczak R Sosnowski D Souza-santos Tz Spassoff E Spiriti P Sponholz S Squarcia D Stampfer C Stanescu S Stanic Steinar Stapnes I Stavitski K Stevenson A Stocchi J Strauss R Strub B Stugu M Szczekowski M Szeptycka T Tabarelli De Fatis F Tegenfeldt F Terranova J Thomas A Tilquin J Timmermans L G Tkatchev T Todorov S Todorova D Z Toet A G Tomaradze B Tomé A Tonazzo L Tortora G Tranströmer D Treille G Tristram A Trombini C Troncon A L Tsirou M L Turluer I A Tyapkin M Tyndel S Tzamarias B ÜBerschär O Ullaland V Uvarov G Valenti E Vallazza C Van Der Velde G W Van Apeldoorn P Van Dam W K Van Doninck J Van Eldik A Van Lysebetten I B Van Vulpen N Vassilopoulos G Vegni L Ventura W A Venus F Verbeure M Verlato L S Vertogradov V Verzi D Vilanova P Vincent L Vitale A S Vodopyanov V Vrba H Wahlen C Walck F Waldner C Weiser Alan M Wetherell D Wicke J H Wickens M Wielers G R Wilkinson W S C Williams M Winter M Witek T Wlodek G Wolf J Yi O P Yushchenko A Zaitsev A Zalewska-bak Piotr Zalewski D Zavrtanik E Zevgolatakos N I Zimin G C Zucchelli G Zumerle

subject

Quark Particle physics Physics and Astronomy (miscellaneous)Electron–positron annihilation Astrophysics::High Energy Astrophysical Phenomena High Energy Physics::Lattice Nuclear Theory 7. Clean energy 01 natural sciences Partícules (Física nuclear)Nuclear physics 0103 physical sciences [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]010306 general physics HADRONIZATION Engineering (miscellaneous)Scaling Quantum chromodynamics Physics 010308 nuclear & particles physics High Energy Physics::Phenomenology Observable QCD Photon structure function Hadronization Gluon MODEL AVERAGE MULTIPLICITIES; QCD; HADRONIZATION; FRAGMENTATION; MODEL Física nuclear High Energy Physics::Experiment FRAGMENTATION AVERAGE MULTIPLICITIES Particle Physics - Experiment

description

The splitting processes in identified quark and gluon jets are investigated using longitudinal and transverse observables. The jets are selected from symmetric three-jet events measured in Z decays L with the {\sc Delphi} detector in 1991-1994. Gluon jets are identified using heavy quark anti-tagging. Scaling violations in identified gluon jets are observed for the first time. The scale energy dependence of the gluon fragmentation function is found to be about two times larger than for the corresponding quark jets, consistent with the QCD expectation $C_A/C_F$. The primary splitting of gluons and quarks into subjets agrees with fragmentation models and, for specific regions of the jet resolution $y$, with NLLA calculations. The maximum of the ratio of the primary subjet splittings in quark and gluon jets is $2.77\pm0.11\pm0.10$. Due to non-perturbative effects, the data are below the expectation at small $y$. The transition from the perturbative to the non-perturbative domain appears at smaller $y$ for quark jets than for gluon jets. Combined with the observed behaviour of the higher rank splittings, this explains the relatively small multiplicity ratio between gluon and quark jets.

year	journal	country	edition	language
1998-06-01

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