1. Electroweak studies ine+e−collisions: 12<√s<46.78 GeV
- Author
-
P. Schulte, R. Leiste, H. Hofer, K. L. Tung, D. Linnhoeffer, M. Rohde, W.-D. Nowak, E. Deffur, D. Hueser-Teuchert, H. S. Chen, L. Garrido, S. Ansari, M. Nusbaumer, M. Bourquin, Konrad Deiters, Joachim Mnich, M. Pohl, B. Zhou, M. M. Ilyas, Howard A. Stone, G. Viertel, Bolek Wyslouch, Hans Rykaczewski, R. Becker-Szendy, M. F. Wyne, D. Luckey, B. X. Yang, H. Nierobisch, K. Z. Guo, J. D. Burger, Marcos Cerrada, H. S. Fesefeldt, Harvey B Newman, M. Sachwitz, U. Herten, Gregor Herten, Miriam Lucio Martinez, D. Fong, H. Anderhub, J. Fehlmann, Min Chen, R. D. Han, J. Salicio, C. Camps, M. A. Marquina, U. Becker, Sandra Consuegra Rodríguez, C. Maña, J. Schug, Q. Z. Li, J. G. Branson, Jérôme Rose, Martin White, H. G. Wu, M. Dhina, Masaki Fukushima, Ren-Yuan Zhu, U. Schroeder, D. Twerenbold, Y. H. Chang, V. Commichau, H. J. Schreiber, Chao-Hsi Chang, J. A. Rubio, K. Hangarter, W. Friebel, W.G. Ma, H. Vogt, Z. M. Wang, H. W. Tang, H. Ma, Bernardo Adeva, R. Hausammann, W. Krenz, M. L. Chen, S. X. Wu, Samuel C.C. Ting, A. Boehm, J. Berdugo, Mingshui Chen, D. Ren, Rr Rau, and M. Tonutti
- Subjects
Nuclear physics ,Physics ,Antiparticle ,Particle physics ,Pair production ,Muon ,TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY ,Electron–positron annihilation ,Electroweak interaction ,High Energy Physics::Experiment ,Elementary particle ,Weinberg angle ,Lepton - Abstract
The Mark J Collaboration at the DESY e/sup +/e/sup -/ collider PETRA presents results on the electroweak reactions e/sup +/e/sup -/..--> mu../sup +/..mu../sup -/tau/sup +/tau/sup -/,..mu../sup +/..mu../sup -/..gamma.., and e/sup +/e/sup -/..mu../sup +/..mu../sup -/. The c.m. energy range is 12 to 46.78 GeV. In the ..mu../sup +/..mu../sup -/ and tau/sup +/tau/sup -/ channels the total cross sections and the forward-backward asymmetries are reported and compared with other experiments. The results are in excellent agreement with the standard model. The weak-neutral-current vector and axial-vector coupling constants are determined. The values for muons and tau's are compatible with universality and with the predictions of the standard model. In the ..mu../sup +/..mu../sup -/..gamma.. channel, all measured distributions, including the forward-backward muon asymmetry, are in excellent agreement with the electroweak theory. Our data on the two-photon process, e/sup +/e/sup -/..mu../sup +/..mu../sup -/, agrees with QED to order ..cap alpha../sup 4/ over the entire energy range and the Q/sup 2/ range from 0.7 to 166 GeV/sup 2/.
- Published
- 1988
- Full Text
- View/download PDF