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从超级质子同步加速器（SPS）的质子-质子碰撞中识别出的带电强子谱提取的温度和体积的快速性和能量依赖性。

Rapidity and Energy Dependencies of Temperatures and Volume Extracted from Identified Charged Hadron Spectra in Proton-Proton Collisions at a Super Proton Synchrotron (SPS).

作者信息

Yang Pei-Pin, Liu Fu-Hu, Olimov Khusniddin K

机构信息

Department of Physics, Xinzhou Normal University, Xinzhou 034000, China.

State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Theoretical Physics, Shanxi University, Taiyuan 030006, China.

出版信息

Entropy (Basel). 2023 Nov 22;25(12):1571. doi: 10.3390/e25121571.

DOI:10.3390/e25121571
PMID:38136451
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10743058/
Abstract

The standard (Bose-Einstein/Fermi-Dirac, or Maxwell-Boltzmann) distribution from the relativistic ideal gas model is used to study the transverse momentum (pT) spectra of identified charged hadrons (π-, π+, K-, K+, p¯, and ) with different rapidities produced in inelastic proton-proton (pp) collisions at a Super Proton Synchrotron (SPS). The experimental data measured using the NA61/SHINE Collaboration at the center-of-mass (c.m.) energies s=6.3, 7.7, 8.8, 12.3, and 17.3 GeV are fitted well with the distribution. It is shown that the effective temperature (Teff or ), kinetic freeze-out temperature (T0), and initial temperature (Ti) decrease with the increase in rapidity and increase with the increase in c.m. energy. The kinetic freeze-out volume () extracted from the π-, π+, K-, K+, and p¯ spectra decreases with the rapidity and increase with the c.m. energy. The opposite tendency of , extracted from the spectra, is observed to be increasing with the rapidity and decreasing with the c.m. energy due to the effect of leading protons.

摘要

利用相对论理想气体模型的标准（玻色 - 爱因斯坦/费米 - 狄拉克，或麦克斯韦 - 玻尔兹曼）分布，研究在超级质子同步加速器（SPS）上非弹性质子 - 质子（pp）碰撞中产生的不同快度下的识别带电强子（π⁻、π⁺、K⁻、K⁺、p̅和 ）的横向动量（pT）谱。使用NA61/SHINE合作组在质心（c.m.）能量√s = 6.3、7.7、8.8、12.3和17.3 GeV下测量的实验数据与该分布拟合良好。结果表明，有效温度（Teff或 ）、动力学冻结温度（T0）和初始温度（Ti）随快度增加而降低，随质心能量增加而升高。从π⁻、π⁺、K⁻、K⁺和p̅谱中提取的动力学冻结体积（ ）随快度降低，随质心能量增加。由于领头质子的影响，从 谱中提取的 呈现出相反的趋势，即随快度增加，随质心能量降低。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2a8b/10743058/17f42093dd4a/entropy-25-01571-g014.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2a8b/10743058/776187c88025/entropy-25-01571-g003.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2a8b/10743058/b8e263782c24/entropy-25-01571-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2a8b/10743058/450974c04182/entropy-25-01571-g007.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2a8b/10743058/17f42093dd4a/entropy-25-01571-g014.jpg

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