Study ofW boson polarisations and Triple G auge boson C ouplings in the reaction
P. A breu,P. A dzic,A. A ndreazza,S. A ndringa,N. A njos,A. A ugustinus,P. Baillon,A. Ballestrero,P. Bam bade,R. Barbier,D. Bardin,G. J. Barker,A. Baroncelli,M. Battaglia,M. Baubillier,K-H. Becks,M. Begalli,A. Behrm ann,N. Benekos,A. Benvenuti,C. Berat,M. Berggren,D. Bertrand,M. Besancon,N. Besson,D. Bloch,M. Blom,M. Bluj,M. Bonesini,M. Boonekam,P. S. L. Booth,G. Borisov,O. Botner,B. Bouquet,T. J. V. Bowcock,I. Boyko,M. Bracko,R. Brenner,E. Brodet,P. Bruckm,J. M. Brunet,B. Buschbeck,P. Buschm ann,M. Calvi,T. Cam poresi,V. Canale,F. Carena,N. Castro,F. Cavallo,M. Chapkin,Ph. Charpentier,P. Checchia,R. Chierici,P. Chliapnikov,J. Chudoba,S. U. Chung,K. Cieslik,P. Collins,R. Contri,G. Cosm,F. Cossutti,M. J. Costa,D. Crennell,J. Cuevas,J. D’H ondt,T. da Silva,W. D a Silva,W. D e Boer,C. D e Clercq,B. D e Lotto,L. de Paula,K. D oroba,J. D rees,G. Eigen,T. Ekelof,M. Ellert,M. Elsing,M. C. Espirito Santo,G. Fanourakis,D. Fassouliotis,M. Feindt,J. Fernandez,A. Ferrer,F. Ferro,U. Flagm eyer,H. Foeth,E. Fokitis,J. Fuster,Ph. G avillet,E. G azis,R. G okieli,P. G oncalves,E. G raziani,G. G rosdidier,J. N. Jackson,G. Jarlskog,P. Jarry,D. Jeans,E. K. Johansson,P. Jonsson,C. Joram,L. Jungerm ann,F. K apusta,S. K atsanevas,U. K erzel,N. J. K jaer,P. K okkinias,M. K ucharczyk,J. Lam sa,G. Leder,F. Ledroit,L. Leinonen,R. Leitner,J. Lem onne,V. Lepeltier,T. Lesiak,W. Liebig,D. Liko,A. Lipniacka,J. H. Lopes,J. M. Lopez,D. Loukas,P. Lutz,L. Lyons,A. M alek,C. M ariotti,N. M astroyiannopoulos,F. M atorras,C. M atteuzzi,K. M uenich,M. M ulders,L. M undim,W. M urray,B. M uryn,F. N avarria,K. N awrocki,R. N icolaidou,V. O braztsov,A. O lshevski,A. O nofre,R. O rava,K. O sterberg,A. O uraou,A. O yanguren,M. Paganoni,S. Paiano,J. P. Palacios,H. Palka,Th. D. Papadopoulou,L. Pape,C. Parkes,F. Parodi,U. Parzefall,A. Passeri,O. Passon,L. Peralta,V. Perepelitsa,A. Perrotta,A. Petrolini,J. Piedra,L. Pieri,F. Pierre,M. Pim enta,E. Piotto,T. Podobnik,V. Poireau,M. E. Pol,G. Polok,V. Pozdniakov,N. Pukhaeva,A. Pullia,P. R ebecchi,D. R eid,J. R idky,A. Sadovsky,J. Salt,C. Sander,U. Schwickerath,R. Sekulin,M. Siebel,A. Sisakian,A. Sokolov,A. Sopczak,R. Sosnowski,T. Spassov,M. Stanitzki,A. Stocchi,J. Strauss,B. Stugu,M. Szczekowski,M. Szeptycka,T. Tabarelli,F. Tegenfeldt,L. Tkatchev,M. Tobin,S. Todorovova,A. Tonazzo,P. Tortosa,P. Travnicek,D. Treille,G. Tristram,M. Trochim czuk,C. Troncon,M-L. Turluer,I. A. Tyapkin,P. Tyapkin,S. Tzam arias,G. Valenti,J. Van Eldik,A. Van Lysebetten,I. Van Vulpen,G. Vegni,F. Veloso,W. Venus,P. Verdier,V. Verzi,V. Vrba,J. W ickens,O. Yushchenko,A. Zalewska,P. Zalewski,D. Zavrtanik,V. Zhuravlov,A. Zintchenko,M. Zupan
semanticscholar（2013）
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摘要
A determ ination ofthesingleW Spin DensityM atrix(SDM )elem entsin thereaction e e ! W + W ! l q q(l= e= )isreported atcentre-of-m assenergies between 189 and 209 GeV.Thedata sam pleused correspondsto an integrated lum inosity of520 pb 1 taken by DELPHIbetween 1998 and 2000. ThesingleW SDM elem ents, W 0 ( ; = 1 or0),aredeterm ined asa function ofthe W production angle with respect to the e beam direction and are obtained from m easurem ents ofthe W decay productsby the application ofsuitableprojection operators, 0,which assum etheV-A coupling oftheW boson to ferm ions. The m easured SDM elem entsare used to obtain the fraction oflongitudinally polarised W s,with theresult:
