Measurement of the triple-gluon vertex from 4-jet events at LEP
P. Abreu,W. Adam,T. Adye,E. Agasi,R. Aleksan,G. D. Alekseev,A. Algeri,P. Allen,S. Almehed,S. J. Alsvaag,U. Amaldi,A. Andreazza,P. Antilogus,W.-D. Apel,R. J. Apsimon,Y. Arnoud,B. Åsman,J.-E. Augustin,A. Augustinus,P. Baillon,P. Bambade,F. Barao,R. Barate,G. Barbiellini,D. Y. Bardin,G. J. Barker,A. Baroncelli,O. Barring,J. A. Barrio,W. Bartl,M. J. Bates,M. Battaglia,M. Baubillier,K.-H. Becks,C. J. Beeston,M. Begalli,P. Beilliere,Yu. Belokopytov,P. Beltran,D. Benedic,A. C. Benvenuti,M. Berggren,D. Bertrand,F. Bianchi,M. S. Bilenky,P. Billoir,J. Bjarne,D. Bloch,S. Blyth,V. Bocci,P. N. Bogolubov,T. Bolognese,M. Bonesini,W. Bonivento,P. S. L. Booth,G. Borisov,H. Burmeister,C. Bosio,B. Bostiancic,S. Bosworth,O. Botner,B. Bouquet,C. Bourdarios,T. J. V. Bowcock,M. Bozzo,S. Braibant,P. Branchini,K. D. Brand,R. A. Brenner,H. Briand,C. Bricman,R. C. A. Brown,N. Brummer,J.-M. Brunet,L. Bugge,T. Buran, H. Burmeister,J. A. M. A. Buytaert,M. Caccia,M. Calvi,A. J. Camacho Rozas,R. Campion,T. Camporesi,V. Canale,F. Cao,F. Carena,L. Carroll,C. Caso,M. V. Castillo Gimenez,A. Cattai,F. R. Cavallo,L. Cerrito,V. Chabaud,A. Chan,M. Chapkin,Ph. Charpentier,L. Chaussard,J. Chauveau,P. Checchia,G. A. Chelkov,L. Chevalier,P. Chliapnikov,V. Chorowicz,J. T. M. Chrin,P. Collins,J. L. Contreras,R. Contri,E. Cortina,G. Cosme,F. Couchot,H. B. Crawley, D. Crennell,G. Crosetti,M. Crozon,J. Cuevas Maestro,S. Czellar,E. Dahl-Jensen,B. Dalmagne,M. Dam,G. Damgaard,G. Darbo,E. Daubie,A. Daum,P. D. Dauncey,M. Davenport,P. David,J. Davies,W. Da Silva,C. Defoix,P. Delpierre,N. Demaria,A. De Angelis,H. De Boeck,W. De Boer,C. De Clerq,M. D. M. De Fez Laso,N. De Groot,C. De La Vaissiere,B. De Lotto,A. De Min,H. Dijkstra,L. Di Ciaccio,J. Dolbeau,M. Donszelmann,K. Doroba,M. Dracos,J. Drees,M. Dris,Y. Dufour,F. Dupont,D. Edsall,L.-O. Eek,P. A.-M. Eerola,R. Ehret,T. Ekelof,G. Ekspong,A. Elliot Peisert,J.-P. Engel,N. Ershaidat,D. Fassouliotis,M. Feindt,M. Fernandez Alonso,A. Ferrer,T. A. Filippas,A. Firestone,H. Foeth,E. Fokitis,F. Fontanelli,K. A. J. Forbes,J.-L. Fousset,S. Francon,B. Franek,P. Frenkiel,D. C. Fries,A. G. Frodesen,R. Fruhwirth,F. Fulda-Quenzer,K. Furnival,H. Furstenau,J. Fuster,D. Gamba,C. Garcia,J. Garcia,C. Gaspar,U. Gasparini,Ph. Gavillet,E. N. Gazis,J.-P. Gerber,P. Giacomelli,R. Gokieli,B. Golob,V. M. Golovatyuk,J. J. Gomez Y Cadenas,G. Gopal,M. Gorski,V. Gracco,A. Grant,F. Grard,E. Graziani,G. Grosdidier,E. Gross,P. Grosse-Wiesmann,B. Grossetete,J. Guy,U. Haedinger,F. Hahn,M. Hahn,S. Haider,A. Hakansson,A. Hallgren,M. Halpaap,K. Hamacher,G. Hamel De Monchenault,W. Hao,F. J. Harris,V. Hedberg,T. Henkes,J. J. Hernandez,P. Herquet,H. Herr,T. L. Hessing,I. Hietanen,C. O. Higgins,E. Higon,H. J. Hilke,S. D. Hodgson,T. Hofmokl,R. Holmes,S.-O. Holmgren,D. Holthuizen,P. F. Honore,J. E. Hooper,M. Houlden,J. Hrubec,K. Huet,P. O. Hulth,K. Hultqvist,P. Ioannou,P.-S. Iversen,J. N. Jackson,P. Jalocha,G. Jarlskog,P. Jarry,B. Jean-Marie,E. K. Johansson,D. Johnson,M. 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Mc Kay,R. Mc Nulty,G. Meola,C. Meroni,W. T. Meyer,M. Michelotto,I. Mikulec,L. Mirabito,W. A. Mitaroff,G. V. Mitselmakher,U. Mjoernmark,T. Moa,R. Moeller,K. Moenig,M. R. Monge,P. Morettini,H. Mueller,W. J. Murray,B. Muryn,G. Myatt,F. L. Navarria,P. Negri, R. Nicolaidou,B. S. Nielsen,B. Nijjhar,V. Nikolaenko,P. E. S. Nilsen,P. Niss,A. Nomerotski,V. Obraztsov,A. G. Olshevski,R. Orava,A. Ostankov,K. Osterberg,A. Ouraou,M. Paganoni,R. Pain,H. Palka,Th. D. Papadopoulou,L. Pape,F. Parodi,A. Passeri,M. Pegoraro,J. Pennanen,L. Peralta,V. Perevozchikov,H. Pernegger,M. Pernicka,A. Perrotta,C. Petridou,A. Petrolini,F. Pierre,M. Pimenta,O. Pingot,S. Plaszczynski,O. Podobrin,M. E. Pol,G. Polok,P. Poropat,V. Pozdniakov,P. Privitera,A. Pullia,D. Radojicic,S. Ragazzi,H. Rahmani,P. N. Ratoff,A. L. Read,P. Rebecchi,N. G. Redaelli,M. Regler,D. Reid,P. B. Renton,L. K. Resvanis,F. Richard,M. Richardson,J. Ridky,G. Rinaudo,I. Roditi,A. Romero,I. Roncagliolo,P. Ronchese,C. Ronnqvist,E. I. Rosenberg,S. 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Vallazza, J. A. Valls Ferrer,C. Vander Velde,G. W. Van Apeldoorn,P. Van Dam,M. Van Der Heijden,W. K. Van Doninck,P. Vaz,G. Vegni,L. Ventura,W. Venus,F. Verbeure,M. Verlato,L. S. Vertogradov,D. Vilanova,P. Vincent,L. Vitale,E. Vlasov,A. S. Vodopyanov,M. Vollmer,M. Voutilainen,V. Vrba,H. Wahlen,C. Walck,F. Waldner,M. Wayne,A. Wehr,M. Weierstall,P. Weilhammer,J. Werner,A. M. Wetherell,J. H. Wickens,G. R. Wilkinson,W. S. C. Williams,M. Winter,M. Witek,G. Wormser,K. Woschnagg,N. Yamdagni,P. Yepes,A. Zaitsev,A. Zalewska,P. Zalewski,D. Zavrtanik,E. Zevgolatakos,G. Zhang,N. I. Zimin,M. Zito,R. Zuberi,R. Zukanovich Funchal,G. Zumerle,J. Zuniga
European Physical Journal C（1993）
Cited 33|Views230
Abstract
From the combined data of 1990 and 1991 of the DELPHI experiment at LEP, 13057 4-jet events are obtained and used for determining the contribution of the triple-gluon vertex. The relevant variables are the generalized Nachtmann Reiter angle ?NR* and the opening angle of the two least energetic jets. A fit to their two-dimensional distribution yields
$$C_A /C_F = 2.12 \pm 0.35 and N_C /N_A = 0.46 \pm 0.19,$$
whereCA/CF is the ratio of the coupling strength of the triple-gluon vertex to that of gluon bremsstrahlung from quarks, andNC/NA, the ratio of the number of quark colours to the number of gluons.
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Key words
Colour, Field Theory, Elementary Particle, Quantum Field Theory, Coupling Strength
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