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Featured researches published by Chao Wei-qin.


Nuclear Physics | 1993

Formation time and intranuclear cascading in high-energy hA collisions

Zhuang Peng-Fei; Chao Wei-qin

The relation between the formation time and the intranuclear cascading in high-energy hA collisions is discussed. By comparing the final-state rapidity distribution obtained from a simple model with the experimental data, the appropriate formation time is estimated as about 1 fm.


Nuclear Physics | 1989

Correlation between transverse energy and zero-degree energy in relativistic heavy-ion collisions

Miao Bi-xia; Chao Wei-qin

Abstract Based on the participant-spectator picture, applying the multisource model, the distributions of the zero-degree energy ( E ZD ) and the transverse energy ( E T ) in the projectile-fragmentation region in relativistic heavy-ion collisions are calculated. The correlation between E T and E ZD distributions is also analyzed. For collisions of 60A and 200A GeV 16 O with different targets our results fit the new data of WA80 at CERN very well.


Communications in Theoretical Physics | 1999

GCP code and analysis of J/psi suppression in p-A and A-A collisions

Yao Xiaoxia; Chao Wei-qin; Pang Yang

Using the General Cascade Program (GCP), the production and absorption of J/psi in p-A and A-A collisions have been studied. Nucleon absorption mechanism and comover absorption mechanism are considered to investigate the J/psi suppression. The results agree well with experimental data of J/psi production, except for the data in Pb-Pb collision.


Archive | 1994

Some Physical Analyses in Relativistic Heavy Ion Collisions

Chao Wei-qin

Some physical analyses in relativistic heavy ion collisions are summarized. Special attention is paid to the energy density analysis and some phenomena which may be related to QGP formation, such as Bose-Einstein correlation. J/ψ suppression and strangeness enhancement.


EPL | 1989

Nuclear Geometry and the ET-Distribution in High-Energy Heavy-Ion Collisions

Chao Wei-qin; Ren Jiang-long

Based on a geometric consideration, applying the multisource model the ET-distributions in the mid-rapidity and the target fragmentation regions in high-energy heavy-ion collisions are calculated. For different projectiles and targets the same set of parameters is used to fit the new data of CERN experiments.


Chinese Physics Letters | 1988

Rapidity distribution in different multiplicity intervals

Chao Wei-qin; Pan Ji-cai

Based on the statistical model proposed by the Berliner group, including the assumption of cluster production and considering energy conservation for each fixed total multiplicity n, good fits to the data of the rapidity distributions for different mutiplicity intervals are obtained.


Communications in Theoretical Physics | 1987

The Factors for the EMC Phenomenon and the Ratio RA = (ρL/ρT)A

Chang Chao-hsi; Chao Wei-qin

The three factors are discussed which may be related to the EMC phenomenon directly, and it is tried to understand the new results on the ratio RA = (ρL/ρT)A. It is also pointed out that shadowing cannot match the obvious deviation in the small x region between the data obtained by the two categories of experiments μA and eA.


Communications in Theoretical Physics | 1985

FITTING THE EMC PHENOMENON WITH A MODIFIED SCALE CHANGE MODEL

Chang Chao-hsi; Chao Wei-qin

It is pointed out that when fitting the EMC experiments, as a modified version of the scale change model, two more factors based on theoretical considerations should be taken into account and probably the valence quark component has a different effective confinement scale from that of the sea quarks.


Physical Review Letters | 1987

What are the low-transverse-energy jets?

Chao Wei-qin; Meng Ta-chung; Pan Ji-cai


Physical Review D | 1987

Rapidity dependence of multiplicity distributions and reaction mechanisms of multiparticle production processes

Chao Wei-qin; Meng Ta-chung; Pan Ji-cai

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Pan Ji-cai

Free University of Berlin

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Meng Ta-chung

State University of New York System

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Cai Xu

Free University of Berlin

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Gao Chong-shou

Free University of Berlin

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