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Your search keyword '"Lang Pengfei"' showing total 3 results
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3 results on '"Lang Pengfei"'

1. Measurement of the branching ratio for theΞ−→Σ−γ radiative decay

Author

Yan Jie, Dai Lisheng, Shi Huanzhang, Lang Pengfei, D. Chen, M. C. Pommot Maia, A. V. Dobrovolsky, M. Luksys, J. R. P. Mahon, N. K. Terentyev, E. McCliment, Tang Fukun, A. M. F. Endler, H. Gottschalk, A. V. Khanzadeev, N. F. Bondar, V.A. Schegelsky, A. A. Vorobyov, Zhong Yuanyuan, P. S. Cooper, M. A. Kubantsev, M. Foucher, A. Morelos, J. Lach, P. Gouffon, A. S. Denisov, C. R. Newsom, I. F. Albuquerque, S. Timm, L. N. Uvarov, Zhao Wenheng, Li Yunshan, Zheng Shuchen, N. P. Kuropatkin, V. T. Grachev, Li Chengze, I. I. Tkatch, T. Dubbs, Carlos Escobar, R. Carrigan, Vincent J Smith, V. L. Golovtsov, and V. M. Samsonov

Subjects
Physics, Baryon, Particle physics, Particle decay, Branching fraction, Hadron, Hyperon, General Physics and Astronomy, Lambda, Xi baryon, Sigma baryon
Abstract

We have measured the branching ratio for the hyperon radiative decay [Xi][sup [minus]][r arrow][Sigma][sup [minus]][gamma] from a sample of 211[plus minus]33 events obtained in the polarized 375 GeV/[ital c] charged hyperon beam at Fermilab. We find [ital B]([Xi][sup [minus]][r arrow][Sigma][sup [minus]][gamma]/[Xi][sup [minus]][r arrow][Lambda][sup 0][pi][sup [minus]])=(1.22[plus minus]0.23[plus minus]0.06)[times]10[sup [minus]4] where the quoted errors are statistical and systematic, respectively. We have also obtained an indication that the sign of the asymmetry parameter of this decay is positive.

Published
1994

2. Measurement of the magnetic moments of theΣ+and Σ¯−hyperons

Author

N. P. Kuropatkin, V. T. Grachev, P. Gouffon, I. F. Albuquerque, M. Foucher, Lang Pengfei, Carlos Escobar, Tkatch, V. M. Samsonov, L. N. Uvarov, A. V. Dobrovolsky, Dai Lisheng, Li Chengze, Li Yunshan, E. McCliment, A. S. Denisov, M. Luksys, V.A. Schegelsky, N. K. Terentyev, P. S. Cooper, R.A. Carrigan, C. R. Newsom, S. Timm, A. Morelos, Zhong Yuanyuan, M. A. Kubantsev, N. F. Bondar, Shi Huanzhang, An.A. Vorobyov, T. Dubbs, J. Lach, Pommot Maia Mc, Tang Fukun, A. M. F. Endler, H. Gottschalk, Alexei Khanzadeev, D Chen, Zhao Wenheng, Zheng Shuchen, V. L. Golovtsov, Vincent J Smith, Yan Jie, and Mahon

Subjects
Baryon, Physics, Antiparticle, Proton, Magnetic moment, CPT symmetry, General Physics and Astronomy, Sigma, High Energy Physics::Experiment, Fermion, Statistical physics, Atomic physics, Sigma baryon
Abstract

We have measured the magnetic moments of the SIGMA+ and SIGMABAR- hyperons produced by 800-GeV protons incident on a Cu target. We determine the SIGMA+ magnetic moment to be (2.4613 +/- 0.0034 +/- 0.0040)mu(N) where the uncertainties are statistical and systematic, respectively. In this first measurement we determine the magnetic moment of the SIGMABAR- to be -(2.428 +/- 0.036 +/- 0.007)mu(N). The magnetic moments of the SIGMA+ and SIGMABAR- are consistent with each other in magnitude but opposite in sign as required by CPT invariance.

Published
1993

3. Measurement of the asymmetry parameter in the hyperon radiative decayΣ+→pγ

Author

A. V. Dobrovolsky, A. Morelos, Lang Pengfei, Tang Fukun, A. M. F. Endler, A. A. Vorobyov, H. Gottschalk, M. A. Kubantsev, Pommot Maia Mc, Lebedenko Vn, Goritchev Pa, Zhao Wenheng, Zheng Shuchen, I. F. Albuquerque, A. S. Denisov, E. McCliment, Li Yunshan, T. Dubbs, Carlos Escobar, N. K. Terentyev, R.A. Carrigan, L. N. Uvarov, M. Foucher, M. Luksys, Li Chengze, S. Timm, Tkatch, V. M. Samsonov, A. V. Khanzadeev, Kuropatkin Np, P. Gouffon, V. L. Golovtsov, J. Lach, N. F. Bondar, Zhong Yuanyuan, Mahon, V. T. Grachev, Shi Huanzhang, Vincent J Smith, D. Chen, Yan Jie, Dai Lisheng, P. S. Cooper, and C. R. Newsom

Subjects
Physics, Nuclear physics, Baryon, Particle physics, Particle decay, Hadron, Hyperon, General Physics and Astronomy, High Energy Physics::Experiment, Elementary particle, Fermion, Charged particle, Sigma baryon
Abstract

We have measured the asymmetry parameter (${\mathrm{\ensuremath{\alpha}}}_{\ensuremath{\gamma}}$) in the hyperon radiative decay ${\mathrm{\ensuremath{\Sigma}}}^{+}$\ensuremath{\rightarrow}p\ensuremath{\gamma} with a sample of 34 754\ifmmode\pm\else\textpm\fi{}212 events obtained in a polarized charged hyperon beam experiment at Fermilab. We find ${\mathrm{\ensuremath{\alpha}}}_{\ensuremath{\gamma}}$=-0.720\ifmmode\pm\else\textpm\fi{}0.086\ifmmode\pm\else\textpm\fi{}0.045, where the quoted errors are statistical and systematic, respectively.

Published
1992

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