非弹性pp, pPb和PbPb碰撞中K *(892)±介子的Tsallis参数测定

IF 1.5 4区 物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS Modern Physics Letters A Pub Date : 2023-10-31 DOI:10.1142/s0217732323501481
Zain Ul Abidin, Uzma Tabassam, Muhammad Ali
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引用次数: 0

摘要

利用蒙特卡罗事件发生器研究了不同质心能量的pp、pPb和PbPb碰撞中奇异介子[公式:见文]和[公式:见文]快速区间内的双微分横向动量谱。将模拟预测结果与ALICE数据进行了比较。利用Tsallis分布函数对ALICE数据的双微分横向动量谱进行拟合。为检查拟合质量,化学势也设为零值。由热力学一致的Tsallis分布函数得到了不同粒子种的非泛化参数([公式:见文])、化学势[公式:见文]和有效Tsallis温度[公式:见文]的提取值。在不同的质心能量下,有效的萨利斯温度升高。将MC事件生成器(PYTHIA8 CR和HIJING 2.0)的预测结果与ALICE数据进行了比较,发现可能是由于部分颜色的重新洗牌和弦碎片造成的偏差。
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Determination of Tsallis parameters for K∗(892)± mesons in inelastic pp, pPb and PbPb collisions
Doubly differential transverse momentum spectra of strange mesons [Formula: see text] and [Formula: see text] within rapidity interval of [Formula: see text] are studied by using Monte Carlo event generators in pp, pPb and PbPb collisions at different center-of-mass energies. The predictions of simulations are compared to the ALICE data. The fitting of doubly differential transverse momentum spectra of ALICE data is performed by using Tsallis distribution function. To check the quality of the fitting, chemical potential is also set to zero value. The extracted values of the non-extensive parameter ([Formula: see text]), a chemical potential [Formula: see text] and effective Tsallis temperature [Formula: see text] for different particle species have been obtained from the thermodynamically consistent Tsallis distribution function. It is observed that the effective Tsallis temperature increases at different center-of-mass energies. The predictions of the MC event generators, i.e. PYTHIA8 CR and HIJING 2.0 are compared to the ALICE data, deviations are observed which may be due to the reshuffling of parton colors and string fragmentation.
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来源期刊
Modern Physics Letters A
Modern Physics Letters A 物理-物理:核物理
CiteScore
3.10
自引率
7.10%
发文量
186
审稿时长
3 months
期刊介绍: This letters journal, launched in 1986, consists of research papers covering current research developments in Gravitation, Cosmology, Astrophysics, Nuclear Physics, Particles and Fields, Accelerator physics, and Quantum Information. A Brief Review section has also been initiated with the purpose of publishing short reports on the latest experimental findings and urgent new theoretical developments.
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