Energy and particle flow in three-jet and radiative two-jet events from hadronic Z decays

M Acciarri ,W Lu,K.N Qureshi,S Mele,V Monaco,O Rind,G Rahal-Callot,P Paolucci,K Deiters,H Fesefeldt,G Carlino,R De Asmundis,A Weber,I Vorobiev,K Freudenreich,B Bertucci,D Ren,A Bay,A Ricker,S Reucroft,N Colino,H Anderhub,S Wynhoff,L Cifarelli,Ph Rosselet,C Leggett,E Leonardi,P.V.K.S Baba,U Becker,F Duhem,R Raghavan,H Kuijten,J Ulbricht,B Bouwens,M Lenti,A Santocchia,R Schulte,S Shevchenko,S Costantini,J Fay,Yu Galaktionov,M Gailloud,S Patricelli,S Goldfarb,I Sheer,M Kaur,H.F Chen,A Degré,A Sopczak,J Berdugo,K Lübelsmeyer,L Servoli,J Weber,A Mihul,F Marzano,J.B Ye,J.C Wang,E Fiandrini,V Shoutko,G.M Chen,P Lebrun,R Castello,A Hervé,T Azemoon,F Behner,H Rykaczewski,M Pieri,I Dorne,A Kasser,D Son,M Sassowsky,T Spickermann,S Sarkar,N Cavallo,E Shumilov,G Raven,F Becattini,D Piccolo,P Extermann,M Meschini,G Organtini,W Lustermann,M Capell,J Shukla,A Robohm,F.L Linde,T Hebbeker,L Djambazov,D Bourilkov,I Leedom,D Hauschildt,M Pohl,T Angelescu,W Van Rossum,S Banerjee,B.P Roe,F Filthaut,P Mcbride,R Timellini,E Nagy,W Lohmann,J Schwenke,S Kirsch,Y Mir,L Barone,F.C Erné,J Goldstein,E Lieb,D Kirkby,S Lanzano,C Civinini,C Burgos,F Cindolo,H Nowak,T Ferguson,P De Jong,M Zeng,B.L Betev,P.G Rancoita,K.Y Lee,M Hebert,O Toker,V Innocente,M Yzerman,G Landi,E Valente,D Luckey,D Pandoulas,C Luci,T Aziz,D Antreasyan,A Kunin,R Clare,R Ostonen,F Cesaroni,G Mirabelli,M Diemoz,A.A Syed,H Schopper,P.G Seiler,C Willmott,C Paus,R.W Kraemer,G Coignet,Samuel C.C Ting,A Bujak,G Chen,E Brambilla,J.S Lee,M Chemarin,C Dionisi,J Casaus,C Chen,W Kittel,S Pensotti,A Buytenhuijs,S Giagu,M Macdermott,N Mnich,A Nippe,A Rubbia,P Laurikainen,A Koulbardis,K Riles,S Shotkin,G Hu,F Wittgenstein,F Ferroni,E Longo,P Zemp,S Morganti,A Aloisio,A.L Anderson,M Redaelli,K Strauch,M Dittmar,B Zhou,P Arce,K Hilgers,E Gallo,C Spartiotis,S Easo,V Koutsenko,C Zaccardelli,R Mount,F Denotaristefani,D Goujon,K Sudhakar,C Sciacca,A Gougas,P Lecoq,P Duinker,D Perret-Gallix,W Wallraff,G Viertel,N Scholz,V Soulimov,G Schwering,G Gratta,M Merk,Q An,Yu Kamyshkov,M Maolinbay,A Favara,S.C Kim,M Guanziroli,R Battiston,D Wright,J Gerald,R Sehgal,M Wadhwa,M Maity,K Schultze,E Dénes,Y Liu,C Li,J.C Sens,G Sartorelli,R Bizzarri,T Paul,P Lecomte,B Monteleoni,G Trowitzsch,H Vogt,L Antonov,H El Mamouni,J.M Lubbers,M Basile,J Alcaraz,C.H Ye,L Taylor,Y.G Kim,J.K Kim,P Marchesini,R Fabbretti,R Leiste,M Cerrada,Z.P Zhang,X.L Wang,M Schneegans,D Boutigny,D Schmitz,D.M Lee,H Suter,S Gentile,R Barillère,D Kim,M Pauluzzi,R Rosmalen,S Dutta,M Biasini,M Bourquin,L Merola,G Passaleva,A Biland,M Caria,U Uwer,L Fredj,F Sticozzi,M Röhner,S Khokhar,E Pistolesi,D.H Zhang,I Clare,A Hasan,L Luminari,P Kapinos,A Tsaregorodtsev,E Drago,V.R Krastev,I Scott,P Levtchenko,C Gu,S Falciano,A Chen,G Sauvage,M Rescigno,M Steuer,P Le Coultre,S Riemann,M Felcini,G Ambrosi,M Tonutti,H.R Dimitrov,A Lebedev,K Banicz,J Salicio,A Boucham,N Gheordanescu,Q Ye,A Pevsner,S Röhner,I Vetlitsky,G Alkhazov,J Busenitz,U Vikas,H Vogel,G Tsipolitis,L Baksay,M Vivargent,M Napolitano,G Chiefari,A Kirkby,Y Karyotakis,A Zichichi,R Weill,P Denes,Y Zeng,P Berges,D Lanske,R Morand,P Schmitz,S Paoletti,Z Ren,W Krenz,N Produit,A Engler,E Koffeman,A Arefiev,A Klimentov,M Chen,L Lista,A Böhm,P Vikas,K Mazumdar,L Malgeri,P Bagnaia,D Dibitonto,Z.M Wang,O Kornadt,C Tully,S Müller,H.S Chen,F Cotorobai,D Mcnally,G Sultanov,B Borgia,I Josa-Mutuberria,Y.F Wang,V Pojidaev,J Kirkby,B Lindemann,K.S Kumar,B Ille,L Romero,G Yang,A Gurtu,L Ludovici,M Chamizo,D Duchesneau,M Rattaggi,V Plyaskin,J Tóth,B De La Cruz,H Postema,V Andreev ,G Fernández ,L W Jones ,Howard A Stone ,M N Kienzle‐Focacci ,C G Yang ,Ma Wen-Gan ,Yong Mei ,F J Rodríguez ,G M Bilei ,R D’alessandro ,H R Hoorani ,R Böck ,G Hamel De Monchenault ,G Massaro ,P H Fisher ,Stefan Roth ,Giovanni Romeo ,Thomas J Mcmahon ,M T Choi ,J M You ,M L Brooks ,Gennaro De Pascale ,N E Moulai ,G Forconì ,Jianfeng Zhou ,P Piroué ,D Stickland ,M G Alviggi ,Y H Chang ,Daniel Fernández ,J A Rubio ,Alexander Bykov ,H R Gustafson ,M W Gruenewald ,G Bencze ,F Nessi‐Tedaldi ,C Y Chien ,X Shi ,T Dai ,Sachin Kumar Mangla ,О Адриани ,Xiaojun Yao ,V K Gupta ,P A Razis ,H Janßen ,H Höfer ,Z Xu ,L Gutay ,H J Schreiber ,J Kapustinsky ,J Qian ,Martin Möller ,Jun He ,X T Cui ,B C Riemers ,J Swain ,A A Vorobyov ,G J Bobbink ,J C Pinto ,J D Burger ,I Durán ,A Ádám ,R C Ball ,J H Field ,F Plášil ,Y S Lu ,E Sánchez ,K F Read ,A C König ,S P Ahlen ,M T Dova ,F Pauß ,G S Sanders ,V A Schegelsky ,J J Blaising ,L Z Sun ,A Basçhirotto ,Christian Schäfer ,F J Eppling ,H B Newman ,W J Metzger ,R Y Zhu ,X Cui ,U K Chaturvedi ,B N Jin ,J G Branson ,B Z Yang ,S Hou ,G Susinno ,W W Kinnison ,S M Ting ,V Brigljević ,M M Ilyas ,M A Niaz ,E González ,Y J Pei ,S C Tonwar ,R P Malik ,Z F Gong ,R T Van De Walle ,G J Zhou ,H O Cohn ,Michel Fabre ,M Aguilar-Benı́tez ,S R Ro ,I C Brock ,László Urbán ,T E Coan ,P Garcı́a-Abia ,S U Chung ,J M Le Goff ,S X Wu ,D J Schotanus ,W J Burger ,J P Martín ,Hasan Rizvi ,А Малинин ,S Rosier‐Lees ,X W Tang ,P Ladrón De Guevara ,Laurent Vuilleumier ,G B Mills ,S C Yeh ,X Cai ,C Mañá ,M E Sarakinos ,J A Bakken ,S N Ganguli ,A Marín ,W Lin ,T Krämer ,A M Cartacci ,Nur Rohim Yunus ,П Спиллантини ,R A Khan ,Bob Van Der Zwaan

doi:10.1016/0370-2693(94)01486-v

Abstract

We report on a detailed study of the energy and particle flow in the event plane of three-jet events (q q g) and radiative two-jet events (q q γ) in hadronic Z decays recorded with the L3 detector. We find a significant decrease in particle and energy density in the angular region between quark and antiquark jets for q q g events as compared with q q γ events. Several QCD model predictions are compared with the observed effect.

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