Measurement Of The Angular Distribution Of Electrons From W -> E Nu Decays Observed In P(P)Over-Bar Collisions At Root S=1.8 Tev

B. Abbott, M. Abolins,V. Abramov,B. S. Acharya, D. L. Adams,M. Adams, G. A. Alves,N. Amos,E. W. Anderson, M. M. Baarmand,V. V. Babintsev,L. Babukhadia, A. Baden, B. Baldin, P. W. Balm,S. Banerjee,J. Bantly,E. Barberis, P. Baringer, J. F. Bartlett, U. Bassler,A. Bean,M. Begel,A. Belyaev,S. B. Beri,G. Bernardi,I. Bertram,A. Besson,V. A. Bezzubov,P. C. Bhat,V. Bhatnagar, M. Bhattacharjee,G. Blazey,S. Blessing,A. Boehnlein,N. I. Bojko,F. Borcherding,A. Brandt, R. Breedon,G. Briskin,R. Brock,G. Brooijmans, A. Bross, D. Buchholz,M. Buehler,V. Buescher,V. S. Burtovoi, J. M. Butler,F. Canelli,W. Carvalho,D. Casey,Z. Casilum,H. Castilla-Valdez,D. Chakraborty,K. M. Chan, S. V. Chekulaev,D. K. Cho, S. Choi,S. Chopra,J. H. Christenson,M. Chung,D. Claes,A. R. Clark, J. Cochran,L. Coney,B. Connolly,W. E. Cooper,D. Coppage,M. Cummings, D. Cutts,O. Dahl,G. Davis,K. Davis,K. De,K. Del Signore, M. Demarteau, R. Demina,P. Demine,D. Denisov,S. Denisov,S. Desai,H. Diehl, M. Diesburg,G. Di Loreto,S. Doulas, P. Draper,Y. Ducros,L. Dudko,S. Duensing,S. Dugad,A. Dyshkant, D. Edmunds,J. Ellison,V. Elvira, R. Engelmann, S. Eno, G. Eppley,P. Ermolov,O. Eroshin,J. Estrada,H. Evans,V. Evdokimov,T. Fahland,S. Feher,D. Fein, T. Ferbel, H. Fisk,Y. Fisyak,E. Flattum,F. Fleuret, M. Fortner,K. Frame,S. Fuess, E. Gallas, A. Galyaev,P. Gartung, V. Gavrilov,R. Genik,K. Genser,C. Gerber, Y. Gershtein, B. Gibbard,R. Gilmartin,G. Ginther,B. Gómez,G. Gómez,P. Goncharov,J. González Solís, H. Gordon,L. Goss,K. Gounder, A. Goussiou,N. Graf,G. Graham,P. Grannis,J. Green, H. Greenlee,S. Grinstein,L. Groer,P. Grudberg,S. Grünendahl, A. Gupta,S. Gurzhiev,G. Gutierrez,P. Gutierrez, N. Hadley, H. Haggerty, S. Hagopian,V. Hagopian,K. Hahn,R. Hall,P. Hanlet,S. Hansen,J. Hauptman,C. Hays,C. Hebert, D. Hedin,A. Heinson, U. Heintz,T. Heuring, R. Hirosky,J. Hobbs, B. Hoeneisen,J. Hoftun,S. Hou,Y. Huang,A. Ito,S. Jerger,R. Jesik, K. Johns, M. Johnson,A. Jonckheere,M. Jones,H. Jöstlein, A. Juste,S. Kahn, E. Kajfasz,D. Karmanov,D. Karmgard, R. Kehoe, S. Kim, B. Klima, C. Klopfenstein,B. Knuteson,W. Ko,J. Kohli, A. Kostritskiy,J. Kotcher,A. Kotwal,A. Kozelov,E. Kozlovsky,J. Krane, M. Krishnaswamy,S. Krzywdzinski,M. Kubantsev,S. Kuleshov,Y. Kulik, S. Kunori,V. Kuznetsov, G. Landsberg, A. Leflat,F. Lehner,J. Li,Q. Li,J. Lima,D. Lincoln,S. Linn, J. Linnemann, R. Lipton, A. Lucotte,L. Lueking,C. Lundstedt,A. Maciel,R. Madaras,V. Manankov,H. Mao,T. Marshall,M. Martin,R. Martin,K. Mauritz,B. May,A. Mayorov, R. McCarthy,J. McDonald,T. McMahon, H. Melanson,X. Meng,M. Merkin, K. Merritt,C. Miao, H. Miettinen,D. Mihalcea,A. Mincer,C. Mishra,N. Mokhov,N. Mondal,H. Montgomery,R. Moore,M. Mostafa,H. da Motta,E. Nagy,F. Nang,M. Narain,V. Narasimham,H. Neal,J. Negret,S. Negroni,D. Norman, L. Oesch,V. Oguri,B. Olivier, N. Oshima, P. Padley,L. Pan,A. Para, N. Parashar,R. Partridge,N. Parua,M. Paterno, A. Patwa,B. Pawlik,J. Perkins,M. Peters,O. Peters, R. Piegaia,H. Piekarz,B. Pope,E. Popkov, H. Prosper, S. Protopopescu, J. Qian, P. Quintas,R. Raja, S. Rajagopalan, E. Ramberg,P. Rapidis,N. Reay, S. Reucroft,J. Rha, M. Rijssenbeek,T. Rockwell,M. Roco, P. Rubinov, R. Ruchti,J. Rutherfoord, A. Santoro,L. Sawyer,R. Schamberger,H. Schellman,A. Schwartzman,J. Sculli,N. Sen, E. Shabalina,H. Shankar,R. Shivpuri,D. Shpakov, M. Shupe,R. Sidwell, V. Simak,H. Singh,J. Singh,V. Sirotenko, P. Slattery,E. Smith,R. Smith,R. Snihur, G. Snow, J. Snow,S. Snyder,J. Solomon,V. Sorín, M. Sosebee,N. Sotnikova,K. Soustruznik,M. Souza,N. Stanton,G. Steinbrück,R. Stephens,M. Stevenson,F. Stichelbaut,D. Stoker, V. Stolin, D. Stoyanova, M. Strauss, K. Streets, M. Strovink,L. Stutte,A. Sznajder,W. Taylor, S. Tentindo-Repond,J. Thompson, D. Toback,S. Tripathi,T. Trippe,A. Turcot, P. Tuts,P. van Gemmeren,V. Vaniev,R. Van Kooten, N. Varelas, A. Volkov,A. Vorobiev,H. Wahl, H. Wang, Z.-M. Wang, J. Warchol, G. Watts, M. Wayne,H. Weerts, A. White,J. White, D. Whiteson,J. Wightman, D. Wijngaarden,S. Willis,S. Wimpenny,J. Wirjawan, J. Womersley,D. Wood,R. Yamada,P. Yamin,T. Yasuda,K. Yip,S. Youssef, J. Yu,Z. Yu,M. Zanabria,H. Zheng,Z. Zhou,Z. Zhu, M. Zielinski, D. Zieminska,A. Zieminski, V. Zutshi,E. Zverev,A. Zylberstejn

PHYSICAL REVIEW D（2001）

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摘要

We present the first measurement of the electron angular distribution parameter alpha (2) in W-->e nu events produced in proton-antiproton collisions as a function of the W boson transverse momentum. Our analysis is based on data collected using the D empty set detector during the 1994-1995 Fermilab Tevatron run. We compare our results with next-to-leadiog order perturbative QCD, which predicts an angular distribution of (1 +/- alpha (1) cos theta* + alpha (2) cos(2) theta*), whew theta* is the polar angle of the electron in the Collins-Soper frame. In the presence of QCD corrections, the parameters alpha (1) and alpha (2) become functions of p(T)(W), the W boson transverse momentum. This measurement provides a test of next-to-leading order QCD corrections which are a non negligible contribution to the W boson mass measurement.

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data collection,high energy physics

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