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Physics Letters B
Volume 318, Issue 1, 25 November 1993, Pages 249-262
 
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doi:10.1016/0370-2693(93)91815-5    
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Copyright © 1993 Published by Elsevier Science B.V. All rights reserved.

Production of Λ and ΛImage correlations in the hadronic decays of the Z0

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DELPHI Collaboration

P. Abreut, W. Adamg, T. Adyeak, E. Agasiad, R. Aleksanam, G. D. Alekseevn, A. Algerim, P. Allenaw, S. Almehedw, S. J. Alvsvaagd, U. Amaldig, A. Andreazzaaa, P. Antilogusx, W-D. Apelo, R. J. Apsimonak, Y. Arnoudam, B. Åsmanas, J-E. Augustinr, A. Augustinusad, P. Baillong, P. Bambader, F. Baraot, R. Baratel, G. Barbiellini3, au, D. Y. Bardinn, G. J. Barkerah, A. Baroncelliao, O. Barringg, J. A. Barrioy, W. Bartlay, M. J. Batesak, M. Battagliam, M. Baubillierv, K-H. Becksba, M. Begalliaj, P. Beillieref, Yu. Belokopytovaq, P. Beltrani, D. Benedich, A. C. Benvenutie, M. Berggrenr, D. Bertrand1, 2, b, F. Bianchiat, M. S. Bilenkyn, P. Billoirv, J. Bjarnew, D. Blochh, J. Blockiaz, S. Blythah, V. Boccial, P. N. Bogolubovn, T. Bologneseam, M. Bonesiniaa, W. Boniventoaa, P. S. L. Boothu, G. Borisovaq, H. Bornerg, C. Bosioao, B. Bostjancicar, S. Bosworthah, O. Botnerav, E. Boudinovaq, B. Bouquetg, C. Bourdariosr, T. J. V. Bowcocku, M. Bozzok, S. Braibant1, 2, b, P. Branchiniao, K. D. Brandai, R. A. Brennerg, H. Briandv, C. Bricman1, 2, b, L. Brillaultv, R. C. A. Browng, P. Bruckmanp, J-M. Brunetf, A. Budziakp, L. Buggeaf, T. Buranaf, H. Burmeisterg, J. A. M. A. Buytaertg, M. Cacciag, M. Calviaa, A. J. Camacho Rozasap, R. Campionu, T. Camporesig, V. Canaleal, F. Cao1, 2, b, F. Carenag, L. Carrollu, M. V. Castillo Gimenezaw, A. Cattaig, F. R. Cavalloe, L. Cerritoal, V. Chabaudg, A. Chana, Ph. Charpentierg, L. Chaussardr, J. Chauveauv, P. Checchiaai, G. A. Chelkovn, L. Chevalieram, P. Chliapnikovaq, V. Chorowiczv, J. T. M. Chrinaw, V. Cindroar, P. Collinsah, J. L. Contrerasy, R. Contrik, E. Cortinaaw, G. Cosmer, F. Couchotr, H. B. Crawleya, D. Crennellak, G. Crosettik, J. Cuevas Maestroag, S. Czellarm, E. Dahl-Jensenab, B. Dalmagner, M. Damaf, G. Damgaardab, G. Darbok, E. Daubie1, 2, b, A. Daumo, P. D. Daunceyah, M. Davenportg, J. Daviesu, W. Da Silvav, C. Defoixf, P. Delpierrez, N. Demariaat, A. De Angelis3, au, H. De Boeck1, 2, b, W. De Boero, S. De Brabandere1, 2, b, C. De Clercq1, 2, b, M. D. M. De Fez Lasoaw, C. De La Vaissierev, B. De Lotto3, au, A. De Minaa, H. Dijkstrag, L. Di Ciaccioal, J. Dolbeauf, M. Donszelmanng, K. Dorobaaz, M. Dracosg, J. Dreesba, M. Drisae, Y. Dufourg, F. Dupontl, D. Edsalla, L-O. Eekav, P. A. -M. Eerolag, R. Ehreto, T. Ekelofav, G. Ekspongas, A. Elliot Peisertai, M. Elsingba, J-P. Engelh, N. Ershaidatv, M. Espirito Santot, V. Falaleevaq, D. Fassouliotisae, M. Feindtg, A. Ferreraw, T. A. Filippasae, A. Firestonea, H. Foethg, E. Fokitisae, F. Fontanellik, K. A. J. Forbesu, J-L. Foussetz, S. Franconx, B. Franekak, P. Frenkielf, D. C. Frieso, A. G. Frodesend, F. Fulda-Quenzerr, H. Furstenauo, J. Fusterg, D. Gambaat, C. Garciaaw, J. Garciaap, C. Gasparg, U. Gaspariniai, Ph. Gavilletg, E. N. Gazisae, J-P. Gerberh, P. Giacomellig, D. Gillespieg, R. Gokieliaz, B. Golobar, V. M. Golovatyukn, J. J. Gomez Y Cadenasg, G. Gopalak, L. Gorna, M. Gorskiaz, V. Graccok, A. Grantg, F. Grard1, 2, b, E. Grazianiao, G. Grosdidierr, E. Grossg, B. Grossetetev, S. Gumenyukaq, J. Guyak, U. Haedingero, F. Hahnba, M. Hahno, S. Haiderad, Z. Hajdukp, A. Hakanssonw, A. Hallgrenav, K. Hamacherba, G. Hamel De Monchenaultam, W. Haoae, F. J. Harrisah, V. Hedbergw, T. Henkesg, R. Henriquest, J. J. Hernandezaw, P. Herquet1, 2, b, H. Herrg, T. L. Hessingt, I. Hietanenm, C. O. Higginst, E. Higonaw, H. J. Hilkeg, S. D. Hodgsonah, T. Hofmoklaz, S-O. Holmgrenas, P. J. Holtah, D. Holthuizenad, P. F. Honoref, M. Houldenu, J. Hrubecay, K. Huet1, 2, b, P. O. Hulthas, K. Hultqvistas, P. Ioannouc, P-S. Iversend, J. N. Jacksonu, P. Jalochap, G. Jarlskogw, P. Jarryam, B. Jean-Marier, E. K. Johanssonas, M. Jonkerg, L. Jonssonw, P. Juilloth, G. Kalkanisc, G. Kalmusak, F. Kapustav, M. Karlssong, E. Karvelasi, S. Katsanevasc, E. C. Katsoufisae, R. Keraneng, B. A. Khomenkon, N. N. Khovanskin, B. Kingu, N. J. Kjaerg, H. Kleing, A. Klovningd, P. Kluitad, A. Koch-Mehrinba, J. H. Koehneo, B. Koenead, P. Kokkiniasi, M. Koratzinosaf, K. Korcylp, A. V. Korytovn, V. Kostioukhineaq, C. Kourkoumelisc, O. Kouznetsovn, P. H. Kramerba, M. Krammeray, C. Kreutero, J. Krolikowskiaz, I. Kronkvistw, U. Kruener-Marquisba, W. Kucewiczp, K. Kulkaav, K. Kurvinenm, C. Lacastaaw, C. Lambropoulosi, J. W. Lamsaa, L. Lanceri3, au, V. Lapinaq, I. Lastu, J-P. Laugieram, R. Lauhakangasm, G. Lederay, F. Ledroitl, R. Leitnerac, Y. Lemoigneam, J. Lemonne1, 2, b, G. Lenzenba, V. Lepeltierr, T. Lesiakp, J. M. Levyh, E. Liebba, D. Likoay, J. Lindgrenm, R. Lindnerba, I. Lippiai, B. Loerstadw, M. Lokajicekj, J. G. Lokenah, A. Lopez-Fernandezg, M. A. Lopez Agueraap, M. Losad, D. Loukasi, J. J. Lozanoaw, P. Lutzf, L. Lyonsah, G. Maehlumaf, J. Maillardf, A. Maiot,A. Malterosi, F. Mandlay, J. Marcoap, M. Margoniai, J-C. Maring, A. Markoui, T. Maronba, S. Martiaw, C. Martinez-Riveroap, F. Matorrasap, C. Matteuzziaa, G. Matthiaeal, M. Mazzucatoai, M. Mc Cubbinu, R. Mc Kaya, R. Mc Nultyu, J. Medboav, G. Meolak, C. Meronia, W. T. Meyera, M. Michelottoai, I. Mikulecay, L. Mirabitox, W. A. Mitaroffay, G. V. Mitselmakhern, U. Mjoernmarkw, T. Moaas, R. Moellerab, K. Moenigg, M. R. Mongek, P. Morettinik, H. Muellero, W. J. Murrayak, G. Myattah, F. L. Navarriae, P. Negriaa, S. Nemecekj, R. Nicolaidouc, B. S. Nielsenab, B. Nijjharu, V. Nikolaenkoaq, P. E. S. Nilsend, P. Nissas, A. Nomerotskiai, V. Obraztsovaq, A. G. Olshevskin, R. Oravam, A. Ostankovaq, K. Osterbergm, A. Ouraouam, M. Peganoniaa, R. Painv, H. Palkap, Th. D. Papadopoulouae, L. Papeg, F. Parodik, A. Passeriao, M. Pegoraroai, J. Pennanenm, L. Peraltat, H. Perneggeray, M. Pernickaay, A. Perrottae, C. Petridou3, au, A. Petrolinik, G. Pianak, F. Pierream, M. Pimentat, S. Plaszczynskir, O. Podobrino, M. E. Polq, G. Polokp, P. Paropat3, au, V. Pozdniakovn, P. Priviteral, A. Pulliaaa, D. Radojicicah, S. Ragazziaa, H. Rahmaniae, J. Ramesj, P. N. Ratoffs, A. L. Readaf, P. Rebecchig, N. G. Redaelliaa, M. Regleray, D. Reidg, P. B. Rentonah, L. K. Resvanisc, F. Richardr, J. Richardsonu, J. Ridkyj, G. Rinaudoat, I. Roditiq, A. Romeroat, I. Roncagliolok, P. Roncheseai, C. Ronnqvistm, E. I. Rosenberga, E. Rossog, P. Roudeaur, T. Rovellie, W. Ruckstuhlad, V. Ruhlmann-Kleideram, A. Ruizap, H. Saarikkom, Y. Sacquinam, G. Sajotl, J. Saltaw, J. Sanchezy, M. Sanninoan, k, S. Schaelg, H. Schneidero, M. A. E. Schynsba, G. Sciollaat, F. Scuri3, au, A. M. Segarah, A. Seitzo, R. Sekulinak, M. Sessa3, au, R. Seuferto, R. C. Shellardaj, I. Siccamaad, P. Siegristam, S. Simonettik, F. Simonettoai, A. N. Sisakiann, G. Skjevlingaf, G. Smadjax, am, O. Smirnovan, G. R. Smithak, R. Sosnowskiaz, D. Souza-Santosaj, T. Spassovt, E. Spiritiao, S. Squarciak, H. Staeckba, C. Stanescuao, S. Stapnesaf, G. Stavropoulosi, F. Stichelbaut1, 2, b, A. Stocchir, J. Straussay, J. Straverg, R. Strubh, B. Stugud, M. Szczekowskig, M. Szeptyckaaz, P. Szymanskiaz, T. Tabarelliaa, O. Tchikilevaq, G. E. Theodosioui, A. Tilquinz, J. Timmermansad, V. G. Timofeevn, L. G. Tkatchevn, T. Todorovh, D. Z. Toetad, O. Tokerm, A. Tomaradze1, 2, b, B. Tomet, E. Torassaat, L. Tortoraao, D. Treilleg, W. Trischukg, G. Tristramf, C. Tronconaa, A. Tsiroug, E. N. Tsyganovn, M-L. Turlueram, T. Tuuvam, I. A. Tyapkinv, M. Tyndelak, S. Tzamariasu, S. Ueberschaerba, O. Ullalandg, V. Uvarovaq, G. Valentie, E. Vallazzaat, J. A. Valls Ferreraw, C. Vander Velde1, 2, b, G. W. Van Apeldoornad, P. Van Damad, M. Van Der Heijdenad, W. K. Van Doninck1, 2, b, J. Van Eldikad, P. Vazg, G. Vegniaa, L. Venturaai, W. Venusak, F. Verbeure1, 2, b, M. Verlatoai, L. S. Vertogradovn, D. Vilanovaam, P. Vincentx, L. Vitalem, E. Vlasovaq, A. S. Vodopyanovn, M. Vollmerba, M. Voutilainenm, V. Vrbaao, H. Wahlenba, C. Walckas, F. Waldner3, au, A. Wehrba, M. Weierstallba, P. Weilhammerg, A. M. Wetherellg, J. H. Wickens1, 2, b, G. R. Wilkinsonah, W. S. C. Williamsah, M. Winterh, M. Witekp, G. Wormserr, K. Woschnaggav, N. Yamdagnias, P. Yepesag, A. Zaitsevaq, A. Zalewskap, P. Zalewskir, M. Zanin3, au, D. Zavrtanikar, E. Zevgolatakosi, N. I. Ziminn, M. Zitoam, D. Zontarar, R. Zuberiah, G. Zumerleai and J. Zunigaaw

a Ames Laboratory and Department of Physics, Iowa State University, Ames IA 50011, USA

b Physics Department, Univ. Instelling Antwerpen, Universiteitsplein 1, B-2610, Wilrijk, Belgium

1 IIHE, ULB-VUB, Pleinlaan 2, B-1050, Brussels, Belgium

2 Faculté des Sciences, Univ. de l'Etat Mons, Av. Maistriau 19, B-7000, Mons, Belgium

c Physics Laboratory, University of Athens, Solonos Str. 104, GR-10680, Athens, Greece

d Department of Physics, University of Bergen, Allégaten 55, N-5007, Bergen, Norway

e Dipartimento di Fisica, Università di Bologna and INFN, Via Irnerio 46, I-40126, Bologna, Italy

f Collège de France, Lab. de Physique Corpusculaire, IN2P3-CNRS, F-75231, Paris Cedex 05, France

g CERN, CH-1211, Geneva 23, Switzerland

h Centre de Recherche Nucléaire, IN2P3 - CNRS/ULP - BP20, F-67037, Strasbourg Cedex, France

i Institute of Nuclear Physics, N.C.S.R. Demokritos, P.O. Box 60228, GR-15310, Athens, Greece

j FZU, Inst. of Physics of the C.A.S. High Energy Physics Division, Na Slovance 2, CS-180 40, Praha 8, Czechoslavakia

k Dipartimento di Fisica, Università di Genova and INFN, Via Dodecaneso 33, I-16146, Genova, Italy

l Institut des Sciences Nucléaires, IN2P3-CNRS, Université de Grenoble 1, F-38026, Grenoble, France

m Research Institute for High Energy Physics, SEFT, Siltavuorenpenger 20C, SF-00170, Helsinki, Finland

n Joint Institute for Nuclear Research, Dubna, Head Post Office, P.O. Box 79, 101 000, Moscow, Russian Federation

o Institut für Experimentelle Kernphysik, Universität Karlsruhe, Postfach 6980, D-7500, Karlsruhe 1, Germany

p High Energy Physics Laboratory, Institute of Nuclear Physics, Ul. Kawiory 26a, PL-30055, Krakow 30, Poland

q Centro Brasileiro de Pesquisas Físicas, rua Xavier Sigaud 150, RJ-22290, Rio de Janeiro, Brazil

r Université de Paris-Sud, Lab. de l'Accélérateur Linéaire, IN2P3-CNRS, bat 200, F-91405, Orsay, France

s School of Physics and Materials, University of Lancaster, Lancaster LA1 4YB, UK

t LIP, IST, FCUL - Av. Elias Garcia, 14 1-o, P-1000, Lisboa Codex, Portugal

u Department of Physics, University of Liverpool, P.O. Box 147, Liverpool L69 3BX, UK

v LPNHE, IN2P3-CNRS, Universités Paris VI et VII, Tour 33 (RdC), 4 place Jussieu, F-75252, Paris Cedex 05, France

w Department of Physics, University of Lund, Sölvegatan 14, S-22363, Lund, Sweden

x Université Claude Bernard de Lyon, IPNL, IN2P3-CNRS, F-69622, Villeurbanne Cedex, France

y Universidad Complutense, Avda. Complutense s/n, E-28040, Madrid, Spain

z Univ. d'Aix - Marseille II - CPP, IN2P3-CNRS, F-13288, Marseille Cedex 09, France

aa Dipartimento di Fisica, Università di Milano and INFN, Via Celoria 16, I-20133, Milan, Italy

ab Niels Bohr Institute, Blegdamsvej 17, DK-2100, Copenhagen Ø, Denmark

ac NC, Nuclear Centre of MFF, Charles University, Areal MFF, V Holesovickach 2, CS-180 00, Praha 8, Czechoslovakia

ad NIKHEF-H, Postbus 41882, NL-1009 DB, Amsterdam, The Netherlands

ae National Technical University, Physics Department, Zografou Campus, GR-15773, Athens, Greece

af Physics Department, University of Oslo, Blindern, N-1000, Oslo 3, Norway

ag Dpto. Fisica, Univ. Oviedo, C/P Jimenez Casas, S/N-33006, Oviedo, Spain

ah Department of Physics, University of Oxford, Keble Road, Oxford OX1 3RH, UK

ai Dipartimento di Fisica, Università di Padova and INFN, Via Marzolo 8, I-35131, Padua, Italy

aj Depto. de Fisica, Pontificia Univ. Católica, C.P. 38071 RJ-22453, Rio de Janeiro, Brazil

ak Rutherford Appleton Laboratory, Chilton, Didcot OX11 OQX, UK

al Dipartimento di Fisica, Università di Roma II and INFN, Tor Vergata, I-00173, Rome, Italy

am Centre d'Etude de Saclay, DSM/DAPNIA, F-91191, Gif-sur-Yvette Cedex, France

an Dipartimento di Fisica-Università di Salerno, I-84100, Salerno, Italy

ao Istituto Superiore di Sanità, Ist. Naz. di Fisica Nucl. (INFN), Viale Regina Elena 299, I-00161, Rome, Italy

ap C.E.A.F.M., C.S.I.C. - Univ. Cantabria, Avda. los Castros, S/N-39006, Santander, Spain

aq Inst. for High Energy Physics, Serpukov P.O. Box 35, Protvino (Moscow Region, Russian Federation

ar J. Stefan Institute and Department of Physics, University of Ljubljana, Jamova 39, SI-61000, Ljubljana, Slovenia

as Fysikum, Stockholm University, Box 6730, S-113 85, Stockholm, Sweden

at Dipartimento di Fisica Sperimentale, Università di Torino and INFN, Via P. Giuria 1, I-10125, Turin, Italy

au Dipartimento di Fisica, Università di Trieste and INFN, Via A. Valerio 2, I-34127, Trieste, Italy

3 Istituto di Fisica, Università di Udine, I-33100, Udine, Italy

av Department of Radiation Sciences, University of Uppsala, P.O. Box 535, S-751 21, Uppsala, Sweden

aw IFIC, Valencia-CSIC, and D.F.A.M.N., U. de Valencia, Avda. Dr. Moliner 50, E-46100, Burjassot (Valencia, Spain

ay Institut für Hochenergiephysik, Österr. Akad. d. Wissensch., Nikolsdferfergasse 18, A-1050, Vienna, Austria

az Inst. Nuclear Studies and University of Warsaw, Ul. Hoza 69, PL-00681, Warsaw, Poland

ba Fachbereich Physik, University of Wuppertal, Postfach 100 127, D-5600, Wuppertal 1, Germany


Received 28 September 1993. 
Editor: K. Winter 
Available online 24 October 2002.

Abstract

An analysis of the production of the Λ baryon in the hadronic decays of the Z0 is presented, based on about 993K multihadronic events collected by the DELPHI detector at LEP during 1991 and 1992. The differencial cross section of the Λ and the correlations between Λ and Image produced in the same event are compared to current models, based both on string fragmentation and on cluster decay. The predictions of the string fragmentation model are found to give satisfactory agreements with the data, clearly better than those of the cluster model.

Article Outline

• References


Physics Letters B
Volume 318, Issue 1, 25 November 1993, Pages 249-262
 
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