Evidence for gluon interference in hadronic Z decays

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

doi:10.1016/0370-2693(95)00552-v

Abstract

We present evidence for soft gluon interference, as required by QCD. This interference is expected to manifest itself in an angular ordering of the gluons radiated within a jet. Using hadronic decays of the Z boson in the L3 detector at LEP, we compare variables sensitive to such an angular ordering, namely the energy-energy correlation asymmetry and the newly introduced particle-particle correlation asymmetry, with the predictions of various parton shower models. Only those models which incorporate the expected interference agree with the data.

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