Measurement of the W boson polarization in top decay at CDF at s=1.8  TeV

D. Acosta,T. Affolder, M. G. Albrow,D. Ambrose, D. Amidei,K. Anikeev, J. Antos, G. Apollinari,T. Arisawa,A. Artikov,W. Ashmanskas, F. Azfar,P. Azzi-Bacchetta, N. Bacchetta, H. Bachacou,W. Badgett, A. Barbaro-Galtieri, V. E. Barnes, B. A. Barnett,S. Baroiant,M. Barone, G. Bauer, F. Bedeschi, S. Behari, S. Belforte,W. H. Bell, G. Bellettini, J. Bellinger, D. Benjamin,A. Beretvas, A. Bhatti,M. Binkley, D. Bisello,M. Bishai, R. E. Blair,C. Blocker,K. Bloom, B. Blumenfeld, A. Bocci,A. Bodek, G. Bolla,A. Bolshov,D. Bortoletto, J. Boudreau,C. Bromberg,E. Brubaker, J. Budagov,H. S. Budd, K. Burkett,G. Busetto, K. L. Byrum,S. Cabrera,M. Campbell,W. Carithers, D. Carlsmith,A. Castro, D. Cauz, A. Cerri, L. Cerrito,J. Chapman, C. Chen, Y. C. Chen, M. Chertok,G. Chiarelli,G. Chlachidze, F. Chlebana,M. L. Chu, J. Y. Chung,W.-H. Chung, Y. S. Chung,C. I. Ciobanu,A. G. Clark,M. Coca, A. Connolly,M. Convery,J. Conway,M. Cordelli,J. Cranshaw, R. Culbertson,D. Dagenhart,S. D’Auria,S. Dell' Agnello,M. Dell' Orso,S. Demers, L. Demortier, M. Deninno,D. De Pedis,P. F. Derwent, C. Dionisi, J. R. Dittmann, A. Dominguez, S. Donati,M. D'Onofrio,T. Dorigo,N. Eddy, R. Erbacher, D. Errede, S. Errede, R. Eusebi,S. Farrington,R. G. Feild, C. Ferretti,I. Fiori,B. Flaugher,L. R. Flores-Castillo,G. W. Foster,M. Franklin,J. Friedman, I. Furic, M. Gallinaro, M. Garcia-Sciveres,A. F. Garfinkel, C. Gay, D. W. Gerdes,E. Gerstein, S. Giagu, P. Giannetti,K. Giolo,M. Giordani,P. Giromini,V. Glagolev,D. Glenzinski,N. Goldschmidt,J. Goldstein,G. Gomez, M. Goncharov, A. T. Goshaw, Y. Gotra, K. Goulianos,A. Gresele,C. Grosso-Pilcher,M. Guenther,J. Guimaraes da Costa, C. Haber, S. R. Hahn, E. Halkiadakis,R. Handler,F. Happacher, K. Hara, R. M. Harris,F. Hartmann, K. Hatakeyama, J. Hauser,J. Heinrich,M. Hennecke,M. Herndon,C. Hill, A. Hocker,K. D. Hoffman,S. Hou, B. T. Huffman, R. Hughes,J. Huston, C. Issever, J. Incandela, G. Introzzi,M. Iori, A. Ivanov,Y. Iwata,B. Iyutin, E. James,M. Jones, T. Kamon,J. Kang,M. Karagoz Unel,H. Kasha,Y. Kato,R. D. Kennedy,R. Kephart, B. Kilminster,D. H. Kim,H. S. Kim,M. J. Kim,S. B. Kim,S. H. Kim,T. H. Kim,Y. K. Kim, M. Kirby, L. Kirsch,S. Klimenko,P. Koehn,K. Kondo, J. Konigsberg, A. Korn, A. Korytov, J. Kroll, M. Kruse,V. Krutelyov,N. Kuznetsova,A. T. Laasanen,S. Lami,S. Lammel,J. Lancaster, K. Lannon,M. Lancaster,R. Lander, A. Lath,A. Laasanen,S. Lami,S. Lammel,J. Lancaster,M. Lancaster,R. Lander,K. Lannon, A. Lath,G. Latino, T. LeCompte,Y. Le,J. Lee, S. Lee,N. Leonardo,S. Leone, J. Lewis, K. Li,C. Lin,M. Lindgren, T. Liss,D. Litvintsev,T. Liu,N. Lockyer, A. Loginov,M. Loreti,D. Lucchesi,P. Lukens, L. Lyons, J. Lys,R. Madrak, K. Maeshima, P. Maksimovic,L. Malferrari,G. Manca,M. Mangano,M. Mariotti, A. Martin,M. Martin, V. Martin,M. Martínez, P. Mazzanti, K. McFarland,P. McIntyre,M. Menguzzato, A. Menzione, P. Merkel, C. Mesropian, A. Meyer,T. Miao,J. Miller,R. Miller,S. Miscetti, G. Mitselmakher,N. Moggi,R. Moore, T. Moulik, A. Mukherjee, M. Mulhearn, T. Muller,A. Munar,P. Murat, J. Nachtman, S. Nahn, I. Nakano,R. Napora, C. Nelson,T. Nelson, C. Neu,M. Neubauer, C. Newman-Holmes,F. Niell,T. Nigmanov, L. Nodulman,S. Oh,Y. Oh, T. Ohsugi,T. Okusawa,W. Orejudos,C. Pagliarone, F. Palmonari, R. Paoletti,V. Papadimitriou,J. Patrick, G. Pauletta, M. Paulini,T. Pauly, C. Paus, D. Pellett,A. Penzo,T. Phillips,G. Piacentino, J. Piedra,K. Pitts,A. Pompoš,L. Pondrom,G. Pope,O. Poukhov,T. Pratt,F. Prokoshin,J. Proudfoot,F. Ptohos,G. Punzi, J. Rademacker,A. Rakitine,F. Ratnikov,H. Ray, A. Reichold, P. Renton, M. Rescigno,F. Rimondi,L. Ristori,W. Robertson, T. Rodrigo, S. Rolli,L. Rosenson,R. Roser, R. Rossin,C. Rott,A. Roy,A. Ruiz,D. Ryan,A. Safonov,R. Denis, W. Sakumoto, D. Saltzberg,C. Sanchez, A. Sansoni,L. Santi,S. Sarkar,P. Savard, A. Savoy-Navarro,P. Schlabach,E. Schmidt,M. Schmidt, M. Schmitt,L. Scodellaro, A. Scribano, A. Sedov, S. Seidel, Y. Seiya,A. Semenov,F. Semeria, M. Shapiro,P. Shepard,T. Shibayama, M. Shimojima, M. Shochet, A. Sidoti,A. Sill,P. Sinervo,A. Slaughter, K. Sliwa,F. Snider,R. Snihur,M. Spezziga,L. Spiegel, F. Spinella, M. Spiropulu,A. Stefanini,J. Strologas, D. Stuart,A. Sukhanov, K. Sumorok,T. Suzuki, R. Takashima,K. Takikawa,M. Tanaka,M. Tecchio,P. Teng, K. Terashi,R. Tesarek,S. Tether,J. Thom,A. Thompson,E. Thomson,P. Tipton, S. Tkaczyk, D. Toback,K. Tollefson,D. Tonelli,M. Tönnesmann,H. Toyoda, W. Trischuk,J. Tseng, D. Tsybychev,N. Turini, F. Ukegawa,T. Unverhau,T. Vaiciulis,A. Varganov,E. Vataga,S. Vejcik,G. Velev,G. Veramendi,R. Vidal, I. Vila,R. Vilar, I. Volobouev,M. von der Mey,R. Wagner, W. Wagner,Z. Wan, C. Wang,M. Wang, S. Wang, B. Ward,S. Waschke, D. Waters,T. Watts, M. Weber, W. Wester, B. Whitehouse, A. Wicklund, E. Wicklund,H. Williams,P. Wilson,B. Winer,S. Wolbers,M. Wolter,S. Worm,X. Wu, F. Würthwein,U. Yang, W. Yao,G. Yeh,K. Yi,J. Yoh,T. Yoshida,I. Yu,S. Yu,J. Yun, L. Zanello, A. Zanetti,F. Zetti,S. Zucchelli

PHYSICAL REVIEW D(2005)

引用 33|浏览235
暂无评分
摘要
The polarization of the W boson in t-->Wb decay is unambiguously predicted by the standard model of electroweak interactions and is a powerful test of our understanding of the tbW vertex. We measure this polarization from the invariant mass of the b quark from t-->Wb and the lepton from W-->lnu whose momenta measure the W decay angle and direction of motion, respectively. In this paper we present a measurement of the decay rate (f(V+A)) of the W produced from the decay of the top quark in the hypothesis of V+A structure of the tWb vertex. We find no evidence for the nonstandard V+A vertex and set a limit on f(V+A) < 0.80 at 95% confidence level. By combining this result with a complementary observable in the same data, we assign a limit on f(V+A) < 0.61 at 95% CL. This corresponds to a constraint on the right-handed helicity component of the W polarization of f(+)<0.18 at 95% CL. This limit is the first significant direct constraint on f(V+A) in top decay.
更多
查看译文
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要