Measurement of the Triple GluonVertex from double quark tagged 4-Jet

W. Adam,T. Adye,P. Adzic,G. D. Alekseev,R. Alemany,P. P. Allport, S. Almehed,U. Amaldi,S. Amato,P. Andersson,A. Andreazza,P. Antilogus,W-D. Apel, Y. Arnoud,J-E. Augustin,A. Augustinus, P. Baillon,P. Bambade,F. Barao,M. Barbi,G. Barbiellini,D. Y. Bardin,G. Barker,A. Baroncelli,M. J. Bates,M. Battaglia,M. Baubillier,J. Baudot,K-H. Becks,M. Begalli,P. Beilliere,Yu. Belokopytov,A. C. Benvenuti,C. Berat,M. Berggren,D. Bertini,D. Bertrand,M. Besancon,F. Bianchi,M. Bigi,M. S. Bilenky,P. Billoir,M-A. Bizouard,D. Bloch,M. Blume,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,M. Bozzo,P. Branchini,K. D. Brand,T. Brenke, R. A. Brenner, R. C. A. Brown,P. Bruckman,J-M. Brunet,L. Bugge, T. Buran,T. Burgsmueller,P. Buschmann,S. Cabrera,M. Caccia,M. Calvi,A. J. Camacho Rozas,T. Camporesi,V. Canale,M. Canepa,F. Carena,L. Carroll,C. Caso,M. V. Castillo Gimenez,A. Cattai,F. R. Cavallo,V. Chabaud,Ph. Charpentier,L. Chaussard,P. Checchia,G. A. Chelkov,M. Chen,R. Chierici,P. Chliapnikov,P. Chochula,V. Chorowicz,J. Chudoba,V. Cindro,P. Collins,M. Colomer,R. Contri,E. Cortina,G. Cosme,F. Cossutti,J-H. Cowell,H. B. Crawley,D. Crennell,G. Crosetti,J. Cuevas Maestro, S. Czellar,J. Dahm,B. Dalmagne,G. Damgaard,P. D. Dauncey,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,C. De La Vaissiere,B. De Lotto,A. De Min,L. De Paula,H. Dijkstra,L. Di Ciaccio,A. Di Diodato,A. Djannati,J. Dolbeau, K. Doroba,M. Dracos,J. Drees,K.-A. Drees,M. Dris,J-D. Durand,D. Edsall,R. Ehret,G. Eigen,T. Ekelof,G. Ekspong,M. Elsing,J-P. Engel,B. Erzen,M. Espirito Santo,E. Falk,G. Fanourakis,D. Fassouliotis,M. Feindt,A. Fenyuk,P. Ferrari,A. Ferrer,S. Fichet,T. A. Filippas,A. Firestone,P.-A. Fischer,H. Foeth,E. Fokitis,F. Fontanelli,F. Formenti,B. Franek,A. G. Frodesen,R. Fruhwirth,F. Fulda-Quenzer,J. Fuster,A. Galloni,D. Gamba,M. Gandelman,C. Garcia,J. Garcia,C. Gaspar,U. Gasparini,Ph. Gavillet,E. N. Gazis,D. Gele,J-P. Gerber, L. Geryukov,R. Gokieli,B. Golob,P. Goncalves,G. Gopal,L. Gorn,M. Gorski,Yu. Gouz,V. Gracco,E. Graziani,C. Green,A. Grefrath,P. Gris,G. Grosdidier,K. Grzelak,M. Gunther,F. Hahn,S. Hahn,Z. Hajduk,A. Hallgren,K. Hamacher,F. J. Harris,V. Hedberg,R. Henriques,J. J. Hernandez,P. Herquet,H. Herr,T. L. Hessing,J.-M. Heuser, E. Higon, S-O. Holmgren, P. J. Holt,D. Holthuizen,S. Hoorelbeke,M. Houlden,J. Hrubec,K. Huet,K. Hultqvist,J. N. Jackson,R. Jacobsson,P. Jalocha,R. Janik,Ch. Jarlskog,G. Jarlskog, P. Jarry,B. Jean-Marie,E. K. Johansson,L. Jonsson,P. Jonsson,C. Joram,P. Juillot,M. Kaiser,F. Kapusta,K. Karafasoulis,S. Katsanevas,R. Keranen,Yu. Khokhlov,B. A. Khomenko,N. N. Khovanski,B. King,N. J. Kjaer,O. Klapp,H. Klein,P. Kluit,D. Knoblauch,P. Kokkinias,A. Konopliannikov,M. Koratzinos,K. Korcyl,V. Kostioukhine,C. Kourkoumelis,O. Kouznetsov,C. Kreuter,I. Kronkvist,Z. Krumstein, W. Krupinski,P. Kubinec,W. Kucewicz,K. Kurvinen,C. Lacasta,I. Laktineh,J. W. Lamsa,L. Lanceri,D. W. Lane,P. Langefeld,J-P. Laugier,R. Lauhakangas,G. Leder,F. Ledroit,V. Lefebure,C. K. Legan,A. Leisos,R. Leitner,J. Lemonne, G. Lenzen,V. Lepeltier,T. Lesiak,M. Lethuillier,J. Libby, D. Liko,A. Lipniacka,I. Lippi,B. Loerstad, J. G. Loken,J. M. Lopez,D. Loukas,P. Lutz,L. Lyons,J. MacNaughton,G. Maehlum,J. R. Mahon,A. Maio,T. G. M. Malmgren,V. Malychev,F. Mandl, J. Marco,R. Marco,B. Marechal,M. Margoni,J-C. Marin,C. Mariotti,A. Markou,C. Martinez-Rivero,F. Martinez-Vidal,J. Masik,F. Matorras,C. Matteuzzi,G. Matthiae,R. Mc Nulty,G. Mc Pherson,J. Medbo,C. Meroni,S. Meyer,W. T. Meyer,A. Miagkov,M. Michelotto,E. Migliore, L. Mirabito,W. A. Mitaro,U. Mjoernmark,T. Moa,R. Moeller,K. Moenig,M. R. Monge,P. Morettini,H. Mueller,K. Muenich,M. Mulders,L. M. Mundim,W. J. Murray,B. Muryn,G. Myatt,T. Myklebust,F. Naraghi,F. L. Navarria,S. Navas,K. Nawrocki,P. Negri,W. Neumann,N. Neumeister,R. Nicolaidou,B. S. Nielsen,M. Nieuwenhuizen,V. Nikolaenko,M. Nikolenko,P. Niss,A. Nomerotski,A. Normand,A. Nygren,W. Oberschulte-Beckmann,V. Obraztsov,A. G. Olshevski,A. Onofre,R. Orava,G. Orazi,S. Ortuno,K. Osterberg, A. Ouraou,P. Paganini,M. Paganoni,H. Palka,Th. D. Papadopoulou,K. Papageorgiou,L. Pape,C. Parkes,F. Parodi,U. Parzefall,A. Passeri,M. Pegoraro,L. Peralta,H. Pernegger,M. Pernicka,A. Perrotta,C. Petridou,A. Petrolini,H. T. Phillips,G. Piana,F. Pierre,T. Podobnik,O. Podobrin,M. E. Pol,G. Polok,P. Poropat,V. Pozdniakov,P. Privitera,N. Pukhaeva,A. Pullia,D. Radojicic,S. Ragazzi,H. Rahmani,J. Rames,P. N. Rato,P. Rebecchi,M. Regler,D. Reid,R. Reinhardt,L. K. Resvanis,F. Richard,J. Ridky,G. Rinaudo,O. Rohne,A. Romero,P. Ronchese,L. Roos,E. I. Rosenberg,P. Rosinsky,P. Roudeau,T. Rovelli,V. Ruhlmann-Kleider,A. Ruiz,K. Rybicki,H. Saarikko,Y. Sacquin,A. Sadovsky, G. Sajot,J. Salt, M. Sannino,H. Schneider,U. Schwickerath,G. Sciolla, F. Scuri,P. Seager,Y. Sedykh,A. M. Segar,A. Seitz,R. Sekulin,L. Serbelloni,R. C. Shellard,A. Sheridan,P. Siegrist,R. Silvestre,F. Simonetto,A. N. Sisakian,T. B. Skaali,G. Smadja,N. Smirnov,O. Smirnova,G. R. Smith,A. Sokolov,O. Solovianov,R. Sosnowski,D. Souza-Santos,T. Spassov,E. Spiriti,P. Sponholz,S. Squarcia,D. Stampfer,C. Stanescu,S. Stapnes,I. Stavitski,K. Stevenson, A. Stocchi,J. Strauss,R. Strub,B. Stugu,M. Szczekowski,M. Szeptycka,T. Tabarelli,J. P. Tavernet,E. Tcherniaev,F. Tegenfeldt

semanticscholar（2007）

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Abstract

The 4-jet events collected by the DELPHI experiment at LEP1 in 1992, 1993 and 1994 are analysed to determine the contribution of the triple-gluon vertex. Two of the four jets are tagged as jets from b-or c-quarks using lifetime and lepton transverse momentum information. The 4-jet contributions from double-gluon bremsstrahlung, the triple-gluon vertex, and secondary quark-antiquark pair production then yield signiicantly diierent two-dimensional distributions in the generalized Nachtmann Reiter angle versus the opening angle of the two secondary jets. These distributions are used to t C A =C F , the ratio of the coupling strength of the triple-gluon vertex to that of gluon bremsstrahlung, and N C =N A , the ratio of the number of quark colours to the number of gluons, giving

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