Unique solution for the weak neutral current coupling constants in purely leptonic interactions |
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| Authors: | D.P. Barber U. Becker G. Berghogff A. Böhm J.G. Branson J. Bron D. Buikman J.D. Burger C.C. Chang H.S. Chen M. Chen C.P. Cheng Y.S. Chu R. Clare P. Duinker G.Y. Fang H. Fesefeldt D. Fong R.Y. Zhu |
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| Affiliation: | 1. III. Physikalisches Institut, Technische Hochschule Aachen, West Germany;2. Deutsches Elektronen-Synchrotron (DESY), Hamburg, West Germany;3. Laboratory for Nuclear Science, Massachusetts Institute of Technology, Cambridge, MA, USA;4. Nationaal Instituut voor Kernfysica en Hoge-Energiefysica (NIKHEF), Amsterdam, The Netherlands;5. Institute of High Energy Physics, Chinese Academy of Science, Peking, People''s Republic of China |
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| Abstract: | By combining results from the MARK-J at PETRA on Bhabha scattering, μ+μ- and τ+τ- production with recent world data from neutrino-electron scattering experiments, we determine unique values for the leptonic weak neutral current coupling constants gV and gA in the framework of electroweak models containing a single Z0. In contrast to previous analyses, we only use data from purely leptonic interactions, and therefore avoid the inherent uncertainties resulting from the use of hadronic targets. From the MARK-J data alone in the context of the standard SU(2) ? U (1) model of Glashow, Weinberg and Salam, we find sin2θW=0.24±0.11. |
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