Production of single W bosons at LEP and measurement of WWγ gauge coupling parameters

Pablo Achard,Oscar S. Adriáni,M. Aguilar-Benítez,Juan Alcaraz,G. Alemanni,Jim V. Allaby,Alberto Aloisio,M. G. Alviggi,Hans B. Anderhub,V. P. Andreev,F. Anselmo,A. S. Arefiev,Tofigh Azemoon,Tariq Aziz,Paolo Bagnaia,A. Bajo,Gyöngyi Baksay,László A. Baksay,S. V. Baldew,Sw W. Banerjee,Artur Barczyk,R. Barillère,Paolo Bartalini,Maurizio Basile,N. V. Batalova,Roberto Battiston,Aurelio Bay,Francesco Becattini,Ulrich J. Becker,F. Behner,Luca Bellucci,Ross I. Berbeco,J. Berdugo,P. Berges,Bruna Bertucci,Botio L. Betev,Maurizio Biasini,M. G. Biglietti,Adrian Biland,JJ J. Blaising,S. C. Blyth,GJ J. Bobbink,Albrecht Böhm,László Boldizsár,Bruno Borgia,Sergio Bottai,Dimitri Bourilkov,Maurice H. Bourquin,Stefano Braccini,James G. Branson,Frederic M. Brochu,Joseph D. Bürger,William J. Burger,Xu Cai,Michael Capell,G. Cara Romeo,Gianpaolo P. Carlino,Annamaria M. Cartacci,Jorge Casaus,Francesca Cavallari,Nicola Cavallo,Claudia Cecchi,M. Cerrada,M. Chamizo Chamizo,Yun Chang,M. Chemarin,Augustine E. Chen,Guomeng Chen,Guoming Chen,Hui Chen,Hesheng Chen,G. V. Chiefari,Luisa Cifarelli,Federico Cindolo,I. Clare,Robert M. Clare,Guy G. Coignet,N. Colino,Silvia Costantini,Begoña De La Cruz,Susanna Cücciarelli,J. A. Van Dalen,Riccardo De Asmundis,P. Déglon,J. Debreczeni,A. Degré,Klaus Dehmelt,K. Deiters,D. Della Volpe,E. Delmeire,Peter Denes,Francesco De Notaristefani,Alessandro De Salvo,Marcella Diemoz,Mark Dierckxsens,Carla Dionisi,Michael Dittmar

Physics Letters B（2002）

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摘要

Single W boson production in electron–positron collisions is studied with the L3 detector at centre-of-mass energies between 192 GeV and 209 GeV. Events with two acoplanar hadronic jets or a single energetic lepton are selected, and the single W cross section is measured. Combining the results with measurements at lower centre-of-mass energies, the ratio of the measured cross section to the Standard Model expectation is found to be 1.12+0.11−0.10±0.03. From all single W data, the WWγ gauge coupling parameter κγ is measured to be 1.116+0.082−0.086±0.068.

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