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Your search keyword '"X H, Yu"' showing total 3 results
Start Over Author "X H, Yu" Journal physics letters b
3 results on '"X H, Yu"'

1. Unique solution for the weak neutral current coupling constants in purely leptonic interactions

Author

K. Sinram, Jennifer S. Li, A. Hariri, C. P. Cheng, P. C. Yang, T. Matsuda, H. S. Fesefeldt, F. Vannucci, J. Warnock, U. Becker, C. M. Ma, M. C. Ho, G. Y. Fang, J. P. Xi, J. P. Revol, D. A. Ma, C. C. Chang, Gregor Herten, D. P. Barber, Ren-Yuan Zhu, D. Fong, Martin White, H. K. Hsu, D. Teuchert, Robert Clare, M. Rohde, C. C. Yu, X. R. Wang, K. L. Tung, R. W. Kadel, G. Berghogff, J. Bron, P. Duinker, M. Fukushima, M. Pohl, Harvey B Newman, J. G. Branson, D. Luckey, X. H. Yu, L. G. Tang, H. W. Tang, H. S. Chen, D. Buikman, H. Rykaczewski, N. L. Zhang, T. W. Wu, F. P. Poschmann, M. Lu, Samuel C.C. Ting, A. Böhm, J. C. Guo, W. Krenz, G. H. Wu, P. S. Wei, T. T. Hsu, J. D. Burger, Min Chen, Y. S. Chu, Q. Z. Li, and G. G. G. Massaro

Subjects
Physics, Coupling constant, Nuclear and High Energy Physics, Particle physics, Neutral current, Scattering, Hadron, Electroweak interaction, Context (language use), Bhabha scattering
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 g V and g A in the framework of electroweak models containing a single Z 0 . 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 sin 2 θ W =0.24±0.11.

Published
1980
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2. Study of electron-positron collisions at the highest PETRA energy

Author

M. Fukushima, P. S. Wei, T. T. Hsu, G. Y. Fang, J. D. Burger, X. R. Wang, R. W. Kadel, Gregor Herten, J. P. Xi, G. G. G. Massaro, D. Fong, K. L. Tung, Harvey B Newman, P. C. Yang, Mingshui Chen, C. C. Chang, H. Rykaczewski, N. L. Zhang, M. C. Ho, F. Vannucci, T. W. Wu, G. H. Wu, Y. S. Chu, C. P. Cheng, D. P. Barber, M. Lu, F. P. Poschmann, T. Matsuda, Q. Z. Li, M. White, H. W. Tang, H. Benda, J. C. Guo, H. S. Fesefeldt, H. S. Chen, D. Buikman, Jennifer S. Li, Robert Clare, M. Rohde, C. M. Ma, Joseph A. Paradiso, J. P. Revol, D. A. Ma, D. Luckey, X. H. Yu, L. G. Tang, Ren-Yuan Zhu, K.K. Hsu, J. G. Branson, K. Sinram, W. Krenz, Samuel C.C. Ting, U. Becker, P. Duinker, J. Bron, and A. Boehm

Subjects
Physics, Quark, Nuclear physics, Nuclear and High Energy Physics, Luminosity (scattering theory), Positron, Hadron, High Energy Physics::Experiment, Electron, Nuclear Experiment, Energy (signal processing)
Abstract

We report on the results of the study of e + e − collisions at the highest PETRA energy of √ s = 31.57 GeV, using the 4π sr, electromagnetic and calorimetric detector Mark J. Based on 88 hadron events, and an integrated luminosity of 243 nb −1 we obtain R = σ (e + e − → hadrons)/ σ (e + e − → μ + μ − ) = 4.0 ± 0.5 (statistical) ± 6 (systematic). The R value, the measured thrust distribution and average spherocity show no evidence for the production of new quark flavors.

Published
1979
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3. Tests of quantum chromodynamics and a direct measurement of the strong coupling constant αs at √s=30 GeV

Author

C. P. Cheng, T. Matsuda, J. P. Revol, D. A. Ma, K. L. Tung, Hans Rykaczewski, H. Benda, Gregor Herten, J. G. Branson, X. R. Wang, P. S. Wei, T. T. Hsu, J. D. Burger, H. K. Hsu, D. P. Barber, P. C. Yang, M. Pohl, J. C. Guo, G. H. Wu, R. W. Kadel, C. C. Chang, C. M. Ma, J. Bron, Mingshui Chen, Jennifer S. Li, A. Hariri, Martin White, H. S. Fesefeldt, D. Luckey, K. Sinram, U. Becker, P. Duinker, Harvey B Newman, G. Y. Fang, X. H. Yu, Q. Z. Li, M. C. Ho, M. Lu, L. G. Tang, Ren-Yuan Zhu, D. Buikman, Samuel C.C. Ting, G.G.G. Massaro, Robert Clare, M. Rohde, H. S. Chen, A. Boehm, H. W. Tang, Y. S. Chu, N. L. Zhang, F. P. Poschmann, W. Krenz, T. W. Wu, F. Vannucci, J. P. Xi, D. Fong, and Masaki Fukushima

Subjects
Quantum chromodynamics, Physics, Nuclear and High Energy Physics, Particle physics, Distribution (mathematics), Phase space, Detector, Hadron, High Energy Physics::Experiment, Constant (mathematics), Energy (signal processing), Charged particle
Abstract

We report the measurement of the reaction e+ + e− → hadronic jets at a center-of-mass energy √s=30 GeV using the MARK-J detector at PETRA. By measuring the energy and angular distribution of both neutrals and charged particles we were able to isolate unambiguously the three-jet events in a kinematic region where the backgrounds from q q and phase space contributions and other processes are small. Various comparisons of the data with quantum chromodynamics were made. The relative yield of three-jet events and the shape distribution of the events enable us to determine αs = 0.23 ± 0.02 (statistical error) with a systematic error of ± 0.04.

Published
1979
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