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Effect of in-medium nucleon-nucleon cross section on proton-proton momentum correlation in intermediate-energy heavy-ion collisions 后印本

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摘要: The proton-proton momentum correlation function (Cpp) from di#11;erent rapidity regions are systematically investigated for the Au + Au collisions at di#11;erent impact parameters and di#11;erent
energies from 400A MeV to 1500A MeV in the framework of the isospin-dependent quantum molecular dynamics model (IQMD) complemented by the Lednick #19; y and Lyuboshitz analytical method.
In particular, in-medium nucleon-nucleon cross section (NNCS) dependence of the correlation function is brought into focus, while the impact parameter and energy dependence of the momentum
correlation function are also explored. The sizes of the emission source are extracted by #12;tting the
momentum correlation functions using the Gaussian source method. We #12;nd that the in-medium
nucleon-nucleon cross section obviously in uence the proton-proton momentum correlation function
which is from the whole rapidity or projectile/target rapidity region at smaller impact parameters,
but there is no e#11;ect on the mid-rapidity proton-proton momentum correlation function, which
indicates that the emission mechanism di#11;ers between projectile/target rapidity and mid-rapidity
protons.

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[V1] 2023-06-20 13:33:21 ChinaXiv:202306.00624V1 下载全文
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