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Featured researches published by Li Chengze.


Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1991

The undulator for the Beijing free electron laser project

Xie Jialin; Zhuang Jiejia; Mao Chensheng; Zhong Yuanyuan; Li Yonggui; Ou Yangqun; Zhao Chunnong; Huang Min; Li Chengze; Wu Qingwu

Abstract The design of a 1.5 m long NdFeB permanent magnet undulator is described. The characteristics are presented. It consists of 400 blocks of permanent magnets (7.5 × 7.5 × 40 mm3) arranged in a Halbach configuration and provides a periodic magnetic field with a peak field of 0.45 T for a gap of 1 cm.


Physical Review D | 1994

New upper limit for the branching ratio of the Omega ---> Xi - gamma radiative decay.

I. F. M. Albuquerque; Nikolai F. Bondar; R. Carrigan; D. Chen; P. S. Cooper; Dai Lisheng; A. S. Denisov; A. V. Dobrovolsky; T. Dubbs; A. M. F. Endler; C. O. Escobar; M. Foucher; V. L. Golovtsov; H. Gottschalk; P. Gouffon; V. T. Grachev; A. V. Khanzadeev; M. A. Kubantsev; N. P. Kuropatkin; J. Lach; Lang Pengfei; Li Chengze; Li Yunshan; M. Luksys; Mahon; E. McCliment; A. Morelos; Charles Ray Newsom; M. C. P. Maia; V.M. Samsonov

We have searched for the rare hyperon radiative decay Omega- to Xi- gamma, using the Fermilab Proton Center 375 GeV/c charged hyperon beam. Our measurement of the Omega- beam fraction at 13.6 m from production is (4.8 +_ 0.4)10**(-5). No signal was found and we determine a new upper limit of (4.6 x 10**-4) at 90% CL for the Omega- to Xi- gamma branching ratio.


Physical Review Letters | 1993

POLARIZATION OF SIGMA+ AND (SIGMA)BAR-HYPERONS PRODUCED BY 800-GEV/C PROTONS

A. Morelos; I. F. M. Albuquerque; Nikolai F. Bondar; R. Carrigan; D. Chen; P. S. Cooper; Dai Lisheng; A. S. Denisov; A. V. Dobrovolsky; T. Dubbs; A. M. F. Endler; C. O. Escobar; M. Foucher; V. L. Golovtsov; H. Gottschalk; P. Gouffon; V. T. Grachev; A. V. Khanzadeev; M. A. Kubantsev; N. P. Kuropatkin; J. Lach; Lang Pengfei; Li Chengze; Li Yunshan; M. Luksys; Mahon; E. McCliment; Charles Ray Newsom; Pommot Maia Mc; V.M. Samsonov


Physical Review Letters | 1992

Measurement of the asymmetry parameter in the hyperon radiative decay Sigma +-->p gamma.

Foucher M; I. F. M. Albuquerque; Nikolai F. Bondar; Carrigan R; Chen D; Li Chengze; Peter S. Cooper; Denisov As; Dobrovolsky Av; Dubbs T; Endler Am; Escobar Co; Tang Fukun; Golovtsov Vl; P.A. Goritchev; H. Gottschalk; Gouffon P; Grachev Vt; Shi Huanzhang; Yan Jie; Khanzadeev Av; M. A. Kubantsev; Kuropatkin Np; Lach J; Luksys M; Lebedenko Vn; Dai Lisheng; Mahon; E. McCliment; A. Morelos


Physical Review D | 1995

P-t and x(F) dependence of the polarization of Sigma(+) hyperons produced by 800 GeV/c protons

A. Morelos; I. F. M. Albuquerque; Nikolai F. Bondar; R. Carrigan; D. Chen; P. S. Cooper; Dai Lisheng; A. S. Denisov; A. V. Dobrovolsky; T. Dubbs; A. M. F. Endler; C. O. Escobar; M. Foucher; V. L. Golovtsov; H. Gottschalk; P. Gouffon; V. T. Grachev; A. V. Khanzadeev; M. A. Kubantsev; N. P. Kuropatkin; J. Lach; Lang Pengfei; Lebedenko Vn; Li Chengze; Li Yunshan; M. Luksys; Mahon; E. McCliment; Charles Ray Newsom; Pommot Maia Mc


Physical Review Letters | 1992

Measurement of the asymmetry parameter in the hyperon radiative decay. Sigma. sup + r arrow p. gamma

M. Foucher; I. F. M. Albuquerque; Nikolai F. Bondar; R. Carrigan; D. Chen; Li Chengze; P. S. Cooper; A. S. Denisov; A. V. Dobrovolsky; T. Dubbs; A. M. F. Endler; C. O. Escobar; Tang Fukun; V. L. Golovtsov; P.A. Goritchev; H. Gottschalk; P. Gouffon; V. T. Grachev; Shi Huanzhang; Yan Jie; A. V. Khanzadeev; Kubantsev; N. P. Kuropatkin; J. Lach; M. Luksys; Lebedenko Vn; Dai Lisheng; J. R. P. Mahon; E. McCliment; A. Morelos


Physical Review D | 1995

MEASUREMENT OF THE BRANCHING RATIO AND ASYMMETRY PARAMETER FOR THE SIGMA(+)-]P-GAMMA RADIATIVE DECAY

S. Timm; I. F. M. Albuquerque; Nikolai F. Bondar; R. Carrigan; D. Chen; P. S. Cooper; Dai Lisheng; A. S. Denisov; A. V. Dobrovolsky; T. Dubbs; A. M. F. Endler; C. O. Escobar; M. Foucher; V. L. Golovtsov; H. Gottschalk; P. Gouffon; V. T. Grachev; A. V. Khanzadeev; M. A. Kubantsev; N. P. Kuropatkin; J. Lach; Lang Pengfei; Langland J; Li Chengze; Li Yunshan; M. Luksys; Mahon; E. McCliment; A. Morelos; Charles Ray Newsom


Physical Review Letters | 1994

Measurement of the branching ratio for the Xi ---> Sigma - gamma radiative decay.

T. Dubbs; I. F. M. Albuquerque; Nikolai F. Bondar; R. Carrigan; D. Chen; P. S. Cooper; Dai Lisheng; A. S. Denisov; A. V. Dobrovolsky; A. M. F. Endler; C. O. Escobar; M. Foucher; V. L. Golovtsov; H. Gottschalk; P. Gouffon; V. T. Grachev; A. V. Khanzadeev; M. A. Kubantsev; N. P. Kuropatkin; J. Lach; Lang Pengfei; Li Chengze; Li Yunshan; M. Luksys; Mahon; E. McCliment; A. Morelos; Charles Ray Newsom; Pommot Maia Mc; V.M. Samsonov


Physical Review Letters | 1993

Polarization of Σ+ and Σ- hyperons produced by 800-GeV/c protons

A. Morelos; I. F. M. Albuquerque; Nikolai F. Bondar; R. Carrigan; D. Chen; P. S. Cooper; Dai Lisheng; A. S. Denisov; A. V. Dobrovolsky; T. Dubbs; A. M. F. Endler; C. O. Escobar; M. Foucher; V. L. Golovtsov; H. Gottschalk; P. Gouffon; V. T. Grachev; A. V. Khanzadeev; M. A. Kubantsev; N. P. Kuropatkin; J. Lach; Lang Pengfei; Li Chengze; Li Yanshan; M. Luksys; J. R. P. Mahon; E. McCliment; Charles Ray Newsom; M. C. P. Maia; V.M. Samsonov


Physical Review D | 2000

Measurement of the Sigma- lifetime and direct comparison with the Sigma+ lifetime

Rf Barbosa; Ivone F. M. Albuquerque; Nikolai F. Bondar; R. A. Jr. Carrigan; D. Chen; Peter S. Cooper; Dai Lisheng; A. S. Denisov; A. V. Dobrovolsky; T. Dubbs; A. M. F. Endler; C. O. Escobar; M. Foucher; V. L. Golovtsov; H. Gottschalk; P. Gouffon; V. T. Grachev; A. V. Khanzadeev; M. A. Kubantsev; N. P. Kuropatkin; J. Lach; J. Langland; Lang Pengfei; Li Chengze; Li Yunshan; M. Luksys; J. R. P. Mahon; E. McCliment; A. Morelos; Charles Ray Newsom

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A. Morelos

Petersburg Nuclear Physics Institute

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Nikolai F. Bondar

Petersburg Nuclear Physics Institute

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M. Luksys

Federal University of Paraíba

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V. L. Golovtsov

Petersburg Nuclear Physics Institute

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J. Lach

University of California

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J. R. P. Mahon

University of São Paulo

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