Extracting Information of Core Halo Model in Heavy ion Collisions by Imaging Technique

YANG Zhi-tao; JIRIMUTU; ZHANG Wei-ning

doi:10.11804/NuclPhysRev.26.02.117

YANG Zhi-tao, JIRIMUTU, ZHANG Wei-ning. Extracting Information of Core Halo Model in Heavy ion Collisions by Imaging Technique[J]. Nuclear Physics Review, 2009, 26(2): 117-122. DOI: 10.11804/NuclPhysRev.26.02.117

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Extracting Information of Core Halo Model in Heavy ion Collisions by Imaging Technique

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We characterize the spatial dimension of pionemitting source in highenergy heavy ion collisions with the radius of rootmeansquared of twopion relativedistance R_rmst. Based on the imaging technique， one can calculate R_rmst modelindependently. Applying this method to the Core-Halo model and comparing the results with that of Gaussian fitted， the results indicate that due to the effects of longlived resonance decay， the values of R_rmst show a larger spatial size of pionemitting region. Meanwhile， for the chaotic source the chaoticity factors calculated by imaging technique are larger than that of Gaussian fitted.

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Extracting Information of Core Halo Model in Heavy ion Collisions by Imaging Technique

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