1. Measurement of the angular distribution of electrons from $W \to e\nu$ decays observed in$p\overline{p}$ collisions at $\sqrt{s}$=1.8 TeV
- Author
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Abbott, B., Abolins, M., Abramov, V., Acharya, B S., Adams, D L., Adams, M., Alves, G A., Amos, N., Anderson, E W., Baarmand, M M., Babintsev, V V., Babukhadia, L R., Baden, A., Baldin, B., Balm, P W., Banerjee, S., Bantly, J., Barberis, E., Baringer, P., Bartlett, J F., Bassler, U., Bean, A., Begel, M., Belyaev, A., Beri, S B., Bernardi, G., Bertram, I., Besson, A., Bezzubov, V A., Bhat, P C., Bhatnagar, V., Bhattacharjee, M., Blazey, G., Blessing, S., Boehnlein, A., Bozhko, N., Borcherding, F., Brandt, A., Breedon, R., Briskin, G., Brock, R., Brooijmans, G., Bross, A., Buchholz, D., Buehler, M., Buescher, V., Burtovoi, V S., Butler, J M., Canelli, F., Carvalho, W., Casey, D., Casilum, Z., Castilla-Valdez, H., Chakraborty, D., Chan, K M., Chekulaev, S V., Cho, D K., Choi, S., Chopra, S., Christenson, J H., Chung, M., Claes, D., Clark, a R., Cochran, J., Coney, L., Connolly, B., Cooper, W E., Coppage, D., Cummings, M a C., Cutts, D., Dahl, O I., Davis, G A., Davis, K., De, K., del Signore, K., Demarteau, M., Demina, R., Demine, P., Denisov, D., Denisov, S P., Desai, S V., Diehl, H T., Diesburg, M., Diloreto, G., Doulas, S., Draper, P., Ducros, Y., Dudko, L V., Duensing, S., Dugad, S R., Dyshkant, A., Edmunds, D L., Ellison, J., Elvira, V D., Engelmann, R., Eno, S., Eppley, G., Ermolov, P., Eroshin, O V., Estrada, J K., Evans, H., Evdokimov, V N., Fahland, T., Feher, S., Fein, D., Ferbel, T., Fisk, H E., Fisyak, Yu., Flattum, E., Fleuret, F., Fortner, M., Frame, K C., Fuess, S., Gallas, E J., Galyaev, a N., Gartung, P E., Gavrilov, V., Genik, R J., Genser, K., Gerber, C E., Gershtein, Yu., Gibbard, B., Gilmartin, R., Ginther, G., Gomez, B., Gomez, G., Goncharov, P I., Gonzalez-Solis, J L., Gordon, H., Goss, L T., Gounder, K., Goussiou, A., Graf, N., Graham, G., Grannis, P D., Green, J A., Greenlee, H., Grinstein, S., Groer, L., Grudberg, P., Gruenendahl, S., Gupta, Anupam, Gurzhev, S N., Gutierrez, G., Gutierrez, P., Hadley, N J., Haggerty, H., Hagopian, S., Hagopian, V., Hahn, K S., Hall, R E., Hanlet, P., Hansen, Scott, Hauptman, J M., Hays, C., Hebert, Christian, Hedin, D., Heinson, a P., Heintz, U., Heuring, T., Hirosky, R., Hobbs, J D., Hoeneisen, B., Hoftun, J S., Hou, S., Huang, Yue, Ito, a S., Jerger, S A., Jesik, R., Johns, K., Johnson, M., Jonckheere, a M., Jones, M., Joestlein, H., Juste, A., Kahn, S., Kajfasz, E., Karmanov, D., Karmgard, D., Kehoe, R., Kim, S K., Klima, B., Klopfenstein, C., Knuteson, B., Ko, W., Kohli, J M., Kostritskii, a V., Kotcher, J., Kotwal, a V., Kozelov, a V., Kozlovskii, E A., Krane, J., Krishnaswamy, M R., Krzywdzinski, S., Kubantsev, M A., Kuleshov, S., Kulik, Y., Kunori, S., Kuznetsov, V E., Landsberg, G L., Leflat, A., Lehner, F., Li, J., Li, Q Z., Lima, J G R., Lincoln, D., Linn, S L., Linnemann, J., Lipton, R., Lucotte, A., Lueking, L H., Lundstedt, C., Maciel, a K A., Madaras, R J., Manankov, V., Mao, H S., Marshall, T., Martin, M I., Martin, R D., Mauritz, K M., May, B., Mayorov, a A., Mccarthy, R., Mcdonald, J., Mcmahon, T., Melanson, H L., Meng, X C., Merkin, M., Merritt, K W., Miao, C., Miettinen, H., Mihalcea, D., Mincer, A., Mishra, C S., Mokhov, N V., Mondal, N K., Montgomery, H E., Moore, R W., Mostafa, M., da Motta, H., Nagy, E., Nang, F., Narain, M., Narasimham, V S., Neal, H A., Negret, J P., Negroni, S., Norman, D., Oesch, L., Oguri, V., Olivier, B., Oshima, N., Padley, P., Pan, Lj., Para, A., Parashar, N., Partridge, R., Parua, N., Paterno, M., Patwa, A., Pawlik, B., Perkins, J., Peters, M., Peters, O., Piegaia, R., Piekarz, H., Pope, B G., Popkov, E., Prosper, H B., Protopopescu, S D., Qian, J., Quintas, P Z., Raja, R., Rajagopalan, S., Ramberg, E., Rapidis, P A., Reay, N W., Reucroft, S., Rha, J., Rijssenbeek, M., Rockwell, T., Roco, M T., Rubinov, P M., Ruchti, R., Rutherfoord, J P., Santoro, A., Sawyer, L., Schamberger, R D., Schellman, H., Schwartzman, A., Sculli, J., Sen, N., Shabalina, E., Shankar, H C., Shivpuri, R K., Shpakov, D., Shupe, M., Sidwell, R A., Simak, V., Singh, H., Singh, J B., Sirotenko, V., Slattery, P., Smith, E., Smith, R P., Snihur, R., Snow, G R., Snow, J., Snyder, S., Solomon, J., Sorin, V., Sosebee, M., Sotnikova, N., Soustruznik, K., Souza, M., Stanton, N R., Steinbruck, G., Stephens, R W., Stevenson, M L., Stichelbaut, F., Stoker, D., Stolin, V., Stoyanova, D A., Strauss, M., Streets, K., Strovink, M., Stutte, L., Sznajder, A., Taylor, W., Tentindo-Repond, S., Thompson, J., Toback, D., Tripathi, S M., Trippe, T G., Turcot, a S., Tuts, P M., van Gemmeren, P., Vaniev, V., van Kooten, R., Varelas, N., Volkov, a A., Vorobev, a P., Wahl, H D., Wang, H., Wang, Z M., Warchol, J., Watts, G., Wayne, M., Weerts, H., White, A., White, J T., Whiteson, D., Wightman, J A., Wijngaarden, D A., Willis, S., Wimpenny, S J., Wirjawan, J V D., Womersley, J., Wood, D R., Yamada, R., Yamin, P., Yasuda, T., Yip, K., Youssef, S., Yu, J., Yu, Z., Zanabria, M., Zheng, H., Zhou, Z., Zhu, Z H., Zielinski, M., Zieminska, D., Zieminski, A., Zutshi, V., Zverev, E G., Zylberstejn, A., Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), D0, Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), and Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
High Energy Physics::Phenomenology ,[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] ,High Energy Physics::Experiment - Abstract
We present the first measurement of the electron angular distribution parameter alpha_2 in W to 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 D0 detector during the 1994--1995 Fermilab Tevatron run. We compare our results with next-to-leading order perturbative QCD, which predicts an angular distribution of (1 +/- alpha_1 cos theta* + alpha_2 cos^2 theta*), where 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.
- Published
- 2001