Chinese Physics C > 1993, Vol. 17 > Issue(1): 49-56

Multi-Pion Correlations in Two-Pion Interferometry

Department of Physics,Harbin Institute of Technology Harbin 1500062 Department of Physics,Kent State University Kent Ohio 442423 Department of Physics,University of California Riverside Ca 92521

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Abstract：
The influence of multi-pion correlations on two-pion interferometry analysis in multi-pion events can be expressed as the ratio of a multi pion correlation factor for the sample of like-pion pairs to a residual correlation factor for the reference sample.Although these two correlation factors can be partially cancelled our in data analyses,the difference between these two factors in the low relative momentum region is so large that the distortion on the analysed results of two-pion interferometry from multi-pion interference becomes a serious problem when the pion source has a small radius and the pion multiplicity of event is high.The distributions of multi-pion correlation factor C _n－2(q) can sensitively reflect the multi-pion correlation effects in the events The analyses of multi-pion correlation factor for two Bevalac streamer chamber data samples of 2.1AGeV Ne+Pb and 1.8AGeV Ar+Pb collisions show that the multi-pion correlation effect in the former data sample is greater that in the latter.

References

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ZHANG Wei-Ning, JIANG Yu-Zhen, WANG Shan and LIU Yi-Ming. Multi-Pion Correlations in Two-Pion Interferometry[J]. Chinese Physics C, 1993, 17(1): 49-56.

ZHANG Wei-Ning, JIANG Yu-Zhen, WANG Shan and LIU Yi-Ming. Multi-Pion Correlations in Two-Pion Interferometry[J]. Chinese Physics C, 1993, 17(1): 49-56. shu

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Received: 1900-01-01
Revised: 1900-01-01

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通讯作者:陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Multi-Pion Correlations in Two-Pion Interferometry

Corresponding author:ZHANG Wei-Ning,

Department of Physics,Harbin Institute of Technology Harbin 1500062 Department of Physics,Kent State University Kent Ohio 442423 Department of Physics,University of California Riverside Ca 92521

Received Date:1900-01-01

Accepted Date:1900-01-01

Available Online:1993-01-05

Abstract:The influence of multi-pion correlations on two-pion interferometry analysis in multi-pion events can be expressed as the ratio of a multi pion correlation factor for the sample of like-pion pairs to a residual correlation factor for the reference sample.Although these two correlation factors can be partially cancelled our in data analyses,the difference between these two factors in the low relative momentum region is so large that the distortion on the analysed results of two-pion interferometry from multi-pion interference becomes a serious problem when the pion source has a small radius and the pion multiplicity of event is high.The distributions of multi-pion correlation factor C_n－2(q) can sensitively reflect the multi-pion correlation effects in the events The analyses of multi-pion correlation factor for two Bevalac streamer chamber data samples of 2.1AGeV Ne+Pb and 1.8AGeV Ar+Pb collisions show that the multi-pion correlation effect in the former data sample is greater that in the latter.

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Multi-Pion Correlations in Two-Pion Interferometry

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