The Scale Dependence of the Hadron Multiplicity in Quark and Gluon Jets and a Precise Determination of $C_{A}/C

6533b830fe1ef96bd1297bf9

RESEARCH PRODUCT

The Scale Dependence of the Hadron Multiplicity in Quark and Gluon Jets and a Precise Determination of $C_{A}/C_{F}$

P Abreu P Abreu W Adam T Adye P Adzic I Ajinenko Z Albrecht T Alderweireld Gd Alekseev R Alemany T Allmendinger Pp Allport S Almehed U Amaldi S Amato Eg Anassontzis P Andersson A Andreazza S Andringa P Antilogus Wd Apel Y Arnoud B Asman Je Augustin A Augustinus P Baillon P Bambade F Barao G Barbiellini R Barbier Dy Bardin G Barker A Baroncelli M Battaglia M Baubillier Kh Becks M Begalli P Beilliere Y Belokopytov Ac Benvenuti C Berat M Berggren D Bertini D Bertrand M Besancon F Bianchi M Bigi Ms Bilenky Ma Bizouard D Bloch Hm Blom M Bonesini W Bonivento M Boonekamp Psl Booth Aw Borgland G Borisov C Bosio O Botner E Boudinov B Bouquet C Bourdarios Tjv Bowcock I Boyko I Bozovic M Bozzo P Branchini T Brenke Ra Brenner P Bruckman Jm Brunet L Bugge T Buran T Burgsmueller P Buschmann S Cabrera M Caccia M Calvi Ajc Rozas T Camporesi V Canale F Carena L Carroll C Caso Mvc Gimenez A Cattai Fr Cavallo V Chabaud P Charpentier L Chaussard P Checchia Ga Chelkov R Chierici P Chliapnikov P Chochula V Chorowicz J Chudoba P Collins R Contri E Cortina G Cosme F Cossutti Jh Cowell Hb Crawley D Crennell S Crepe G Crosetti Jc Maestro S Czellar G Damgaard M Davenport W Da Silva A Deghorain G Della Ricca P Delpierre N Demaria A De Angelis W De Boer S De Brabandere C De Clercq B De Lotto A De Min L De Paula H Dijkstra L Di Ciaccio J Dolbeau K Doroba M Dracos J Drees M Dris A Duperrin Jd Durand G Eigen T Ekelof G Ekspong M Ellert M Elsing Jp Engel B Erzen Me Santo E Falk G Fanourakis D Fassouliotis J Fayot M Feindt P Ferrari A Ferrer E Ferrer-ribas S Fichet A Firestone U Flagmeyer H Foeth E Fokitis F Fontanelli B Franek Ag Frodesen R Fruhwirth F Fulda-quenzer J Fuster A Galloni D Gamba S Gamblin M Gandelman C Garcia J Garcia C Gaspar M Gaspar U Gasparini P Gavillet En Gazis D Gele L Gerdyukov N Ghodbane I Gil F Glege R Gokieli B Golob G Gomez-ceballos P Goncalves Ig Caballero G Gopal L Gorn M Gorski Y Gouz V Gracco J Grahl E Graziani C Green Hj Grimm P Gris G Grosdidier K Grzelak M Gunther J Guy F Hahn S Hahn S Haider A Hallgren K Hamacher J Hansen Fj Harris V Hedberg S Heising Jj Hernandez P Herquet H Herr Tl Hessing Jm Heuser E Higon So Holmgren Pj Holt S Hoorelbeke M Houlden J Hrubec K Huet Gj Hughes K Hultqvist Jn Jackson R Jacobsson P Jalocha R Janik C Jarlskog G Jarlskog P Jarry B Jean-marie Ek Johansson P Jonsson C Joram P Juillot F Kapusta K Karafasoulis S Katsanevas Ec Katsoufis R Keranen Bp Kersevan Ba Khomenko Nn Khovanski A Kiiskinen B King A Kinvig Nj Kjaer O Klapp H Klein P Kluit P Kokkinias M Koratzinos V Kostioukhine C Kourkoumelis O Kouznetsov M Krammer E Kriznic J Krstic Z Krumstein P Kubinec W Kucewicz J Kurowska K Kurvinen Jw Lamsa Dw Lane P Langefeld V Lapin Jp Laugier R Lauhakangas G Leder F Ledroit V Lefebure L Leinonen A Leisos R Leitner J Lemonne G Lenzen V Lepeltier T Lesiak M Lethuillier J Libby D Liko A Lipniacka I Lippi B Loerstad Jg Loken Jh Lopes Jm Lopez R Lopez-fernandez D Loukas P Lutz L Lyons J Macnaughton Jr Mahon A Maio A Malek Tgm Malmgren V Malychev F Mandl J Marco R Marco B Marechal M Margoni Jc Marin C Mariotti A Markou C Martinez-rivero F Martinez-vidal Smi Garcia J Masik N Mastroyiannopoulos F Matorras C Matteuzzi G Matthiae F Mazzucato M Mazzucato M Mc Cubbin R Mc Kay R Mc Nulty G Mc Pherson C Meroni Wt Meyer A Miagkov E Migliore L Mirabito Wa Mitaroff U Mjoernmark T Moa M Moch R Moeller K Moenig Mr Monge X Moreau P Morettini G Morton U Mueller K Muenich M Mulders C Mulet-marquis R Muresan Wj Murray B Muryn G Myatt T Myklebust F Naraghi Fl Navarria S Navas K Nawrocki P Negri S Nemecek N Neufeld N Neumeister R Nicolaidou Bs Nielsen M Nikolenko V Nomokonov A Normand A Nygren V Obraztsov Ag Olshevski A Onofre R Orava G Orazi K Osterberg A Ouraou M Paganoni S Paiano R Pain R Paiva J Palacios H Palka Td Papadopoulou K Papageorgiou L Pape C Parkes F Parodi U Parzefall A Passeri O Passon M Pegoraro L Peralta A Perrotta C Petridou A Petrolini Ht Phillips F Pierre M Pimenta E Piotto T Podobnik Me Pol G Polok P Poropat V Pozdniakov P Privitera N Pukhaeva A Pullia D Radojicic S Ragazzi H Rahmani D Rakoczy Pn Ratoff Al Read P Rebecchi Ng Redaelli M Regler D Reid R Reinhardt Pb Renton Lk Resvanis F Richard J Ridky G Rinaudo O Rohne A Romero P Ronchese Ei Rosenberg P Rosinsky P Roudeau T Rovelli C Royon V Ruhlmann-kleider A Ruiz H Saarikko Y Sacquin A Sadovsky G Sajot J Salt D Sampsonidis M Sannino H Schneider P Schwemling U Schwickerath Mae Schyns F Scuri P Seager Y Sedykh Am Segar R Sekulin Rc Shellard A Sheridan M Siebel L Simard F Simonetto An Sisakian G Smadja O Smirnova Gr Smith A Sokolov O Solovianov A Sopczak R Sosnowski T Spassov E Spiriti P Sponholz S Squarcia D Stampfer C Stanescu S Stanic K Stevenson A Stocchi J Strauss R Strub B Stugu M Szczekowski M Szeptycka T Tabarelli F Tegenfeldt F Terranova J Thomas J Timmermans N Tinti Lg Tkatchev S Todorova B Tome A Tonazzo L Tortora G Transtromer D Treille G Tristram M Trochimczuk C Troncon A Tsirou Ml Turluer Ia Tyapkin S Tzamarias B Ueberschaer O Ullaland V Uvarov G Valenti E Vallazza Gw Van Apeldoorn P Van Dam J Van Eldik A Van Lysebetten I Van Vulpen N Vassilopoulos G Vegni L Ventura W Venus F Verbeure M Verlato Ls Vertogradov V Verzi D Vilanova L Vitale E Vlasov As Vodopyanov C Vollmer G Voulgaris V Vrba H Wahlen C Walck C Weiser D Wicke Jh Wickens Gr Wilkinson M Winter M Witek G Wolf J Yi O Yushchenko A Zalewska P Zalewski D Zavrtanik E Zevgolatakos Ni Zimin Gc Zucchelli G Zumerle Delphi Collaboration

subject

Quark Particle physics Nuclear and High Energy Physics E+E ANNIHILATION Scale (ratio)High Energy Physics::Lattice Hadron Nuclear Theory FOS: Physical sciences 01 natural sciences Partícules (Física nuclear)High Energy Physics - Experiment EVENTS High Energy Physics - Experiment (hep-ex)MONTE-CARLO 0103 physical sciences [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]DISTRIBUTIONS SPECTRA 010306 general physics Nuclear Experiment DELPHI Physics 010308 nuclear & particles physics High Energy Physics::Phenomenology Resonance Multiplicity (mathematics)LARGE ELECTRON POSITRON COLLIDER RATIOS Hadronization Gluon PERTURBATIVE-QCD PARTICLE PHYSICS; LARGE ELECTRON POSITRON COLLIDER; DELPHI PARTICLE PHYSICS AVERAGE MULTIPLICITIES; E+E ANNIHILATION; PERTURBATIVE-QCD; MONTE-CARLO; PARTICLE; FRAGMENTATION; DISTRIBUTIONS; SPECTRA; EVENTS; RATIOS Física nuclear High Energy Physics::Experiment FRAGMENTATION PARTICLE Particle Physics - Experiment AVERAGE MULTIPLICITIES

description

\frac{C_A}{C_F} = 2.246 \pm 0.062~(stat.) \pm 0.080~(syst.) \pm 0.095~(theo.) Data collected at the Z resonance using the DELPHI detector at LEP are used to determine the charged hadron multiplicity in gluon and quark jets as a function of a transverse momentum-like scale. The colour factor ratio, \cacf, is directly observed in the increase of multiplicities with that scale. The smaller than expected multiplicity ratio in gluon to quark jets is understood by differences in the hadronization of the leading quark or gluon. From the dependence of the charged hadron multiplicity on the opening angle in symmetric three-jet events the colour factor ratio is measured to be: C_A/C_F = 2.246 \pm 0.062 (stat.) \pm 0.080 (syst.) \pm 0.095 (theo.) Data collected at the Z resonance using the DELPHI detector at LEP are used to determine the charged hadron multiplicity in gluon and quark jets as a function of a transverse momentum-like scale. The colour factor ratio, \cacf, is directly observed in the increase of multiplicities with that scale. The smaller than expected multiplicity ratio in gluon to quark jets is understood by differences in the hadronization of the leading quark or gluon. From the dependence of the charged hadron multiplicity on the opening angle in symmetric three-jet events the colour factor ratio is measured to be: C_A/C_F = 2.246 \pm 0.062 (stat.) \pm 0.080 (syst.) \pm 0.095 (theo.) Data collected at the Z resonance using the DELPHI detector at LEP are used to determine the charged hadron multiplicity in gluon and quark jets as a function of a transverse momentum-like scale. The colour factor ratio, \cacf, is directly observed in the increase of multiplicities with that scale. The smaller than expected multiplicity ratio in gluon to quark jets is understood by differences in the hadronization of the leading quark or gluon. From the dependence of the charged hadron multiplicity on the opening angle in symmetric three-jet events the colour factor ratio is measured to be: C_A/C_F = 2.246 \pm 0.062 (stat.) \pm 0.080 (syst.) \pm 0.095 (theo.) Data collected at the Z resonance using the DELPHI detector at LEP are used to determine the charged hadron multiplicity in gluon and quark jets as a function of a transverse momentum-like scale. The colour factor ratio, \cacf, is directly observed in the increase of multiplicities with that scale. The smaller than expected multiplicity ratio in gluon to quark jets is understood by differences in the hadronization of the leading quark or gluon. From the dependence of the charged hadron multiplicity on the opening angle in symmetric three-jet events the colour factor ratio is measured to be: C_A/C_F = 2.246 \pm 0.062 (stat.) \pm 0.080 (syst.) \pm 0.095 (theo.) Data collected at the Z resonance using the DELPHI detector at LEP are used to determine the charged hadron multiplicity in gluon and quark jets as a function of a transverse momentum-like scale. The colour factor ratio, \cacf, is directly observed in the increase of multiplicities with that scale. The smaller than expected multiplicity ratio in gluon to quark jets is understood by differences in the hadronization of the leading quark or gluon. From the dependence of the charged hadron multiplicity on the opening angle in symmetric three-jet events the colour factor ratio is measured to be: C_A/C_F = 2.246 \pm 0.062 (stat.) \pm 0.080 (syst.) \pm 0.095 (theo.) Data collected at the Z resonance using the DELPHI detector at LEP are used to determine the charged hadron multiplicity in gluon and quark jets as a function of a transverse momentum-like scale. The colour factor ratio, \cacf, is directly observed in the increase of multiplicities with that scale. The smaller than expected multiplicity ratio in gluon to quark jets is understood by differences in the hadronization of the leading quark or gluon. From the dependence of the charged hadron multiplicity on the opening angle in symmetric three-jet events the colour factor ratio is measured to be: C_A/C_F = 2.246 \pm 0.062 (stat.) \pm 0.080 (syst.) \pm 0.095 (theo.) Data collected at the Z resonance using the DELPHI detector at LEP are used to determine the charged hadron multiplicity in gluon and quark jets as a function of a transverse momentum-like scale. The colour factor ratio, \cacf, is directly observed in the increase of multiplicities with that scale. The smaller than expected multiplicity ratio in gluon to quark jets is understood by differences in the hadronization of the leading quark or gluon. From the dependence of the charged hadron multiplicity on the opening angle in symmetric three-jet events the colour factor ratio is measured to be: C_A/C_F = 2.246 \pm 0.062 (stat.) \pm 0.080 (syst.) \pm 0.095 (theo.) Data collected at the Z resonance using the DELPHI detector at LEP are used to determine the charged hadron multiplicity in gluon and quark jets as a function of a transverse momentum-like scale. The colour factor ratio, \cacf, is directly observed in the increase of multiplicities with that scale. The smaller than expected multiplicity ratio in gluon to quark jets is understood by differences in the hadronization of the leading quark or gluon. From the dependence of the charged hadron multiplicity on the opening angle in symmetric three-jet events the colour factor ratio is measured to be: C_A/C_F = 2.246 \pm 0.062 (stat.) \pm 0.080 (syst.) \pm 0.095 (theo.) Data collected at the Z resonance using the DELPHI detector at LEP are used to determine the charged hadron multiplicity in gluon and quark jets as a function of a transverse momentum-like scale. The colour factor ratio, \cacf, is directly observed in the increase of multiplicities with that scale. The smaller than expected multiplicity ratio in gluon to quark jets is understood by differences in the hadronization of the leading quark or gluon. From the dependence of the charged hadron multiplicity on the opening angle in symmetric three-jet events the colour factor ratio is measured to be: C_A/C_F = 2.246 \pm 0.062 (stat.) \pm 0.080 (syst.) \pm 0.095 (theo.) Data collected at the Z resonance using the DELPHI detector at LEP are used to determine the charged hadron multiplicity in gluon and quark jets as a function of a transverse momentum-like scale. The colour factor ratio, \cacf, is directly observed in the increase of multiplicities with that scale. The smaller than expected multiplicity ratio in gluon to quark jets is understood by differences in the hadronization of the leading quark or gluon. From the dependence of the charged hadron multiplicity on the opening angle in symmetric three-jet events the colour factor ratio is measured to be: C_A/C_F = 2.246 \pm 0.062 (stat.) \pm 0.080 (syst.) \pm 0.095 (theo.) Data collected at the Z resonance using the DELPHI detector at LEP are used to determine the charged hadron multiplicity in gluon and quark jets as a function of a transverse momentum-like scale. The colour factor ratio, \cacf, is directly observed in the increase of multiplicities with that scale. The smaller than expected multiplicity ratio in gluon to quark jets is understood by differences in the hadronization of the leading quark or gluon. From the dependence of the charged hadron multiplicity on the opening angle in symmetric three-jet events the colour factor ratio is measured to be: C_A/C_F = 2.246 \pm 0.062 (stat.) \pm 0.080 (syst.) \pm 0.095 (theo.) Data collected at the Z resonance using the DELPHI detector at LEP are used to determine the charged hadron multiplicity in gluon and quark jets as a function of a transverse momentum-like scale. The colour factor ratio, C A / C F , is directly observed in the increase of multiplicities with that scale. The smaller than expected multiplicity ratio in gluon to quark jets is understood by differences in the hadronization of the leading quark or gluon. From the dependence of the charged hadron multiplicity on the opening angle in symmetric three-jet events the colour factor ratio is measured to be: C A /C F =2.246±0.062 (stat.)±0.080 (syst.)±0.095 (theo.)

year	journal	country	edition	language
1999-01-01	Physics Letters B

10.1016/s0370-2693(99)00112-4 https://doi.org/10.1016/S0370-2693(99)00112-4