Direct Measurement Of The W-Gamma Coupling At The Cern Pbarp Collider

J Alitti,G Ambrosini,R Ansari,D Autiero,P Bareyre,I Bertram,G Blaylock,P Bonamy,K Borer, M Bourliand,D Buskulic,G Carboni, D Cavalli,V Cavasinni,P Cenci,J C Chollet, C Conta,Gabriel C Costa,F Costantini,L Cozzi, A Cravero,M Curatolo,Andrea Dellacqua,T Delprete, R S Dewolf,L Dilella,Y Ducros,Gary F Egan, K Einsweiler,Bellisario Esposito, L Fayard,A Federspiel,R Ferrari, M Fraternali, D Froidevaux,G Fumagalli,J M Gaillard,F Gianotti,O Gildemeister, C Gossling, V G Goggi, S Grunendahl, K Hara,Sten Hellman,J Hrivnac, H Hufnagel,E Hugentobler, K Hultqvist,E Iacopini, J Incandela, K Jakobs, P Jenni, E E Kluge,N Kurz,S Lami, P Lariccia,Michel Lefebvre,L Linssen,M Livan,P Lubrano, C Magneville, L Mandelli, L Mapelli, M Mazzanti,Karlheinz Meier,B Merkel,J Meyer,M Moniez,R Moning, M Morganti,L Muller, D J Munday,M Nessi,F Nessitedaldi,C Onions,T Pal,Michael Andrew Parker,G Parrour, F Pastore, E Pennacchio,J M Pentney,M Pepe,L Perini, C Petridou,P Petroff,H Plothowbesch,G Polesello,A Poppleton,K Pretzl,M Primavera,M Punturo, J P Repellin, A Rimoldi,Maria Carmela Sacchi,P Scampoli,J Schacher, B Schmidt, V Simak,S L Singh, V Sondermann, R Spiwoks, S Stapnes,C Talamonti, F Tondini,S N Tovey, E Tsesmelis,G Unal,M Valdatanappi, V Vercesi, A R Weidberg, P S Wells, T O White, D R Wood,S A Wotton,H Zaccone,A Zylberstejn

PHYSICS LETTERS B（1992）

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摘要

The process ppBAR --> e-nu-gamma + X is studied as square-root s = 630 GeV. The observed signal is used to extract a direct measurement of the parameters-kappa and lambda which define the magnetic dipole and electric quadrupole moments of the W boson and therefore the WW-gamma coupling. We find kappa = 1(-2.2)+2.6 and lambda = 0(-1.8)+1.7 and their 95% confidence limits -3.5 < kappa < 5.9 and -3.6 < lambda < 3.5. The results are model independent and in good agreement with the standard model values, kappa = 1 and lambda = 0.

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