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Systematic analysis of midrapidity transverse momentum spectra of identified charged particles in p + p collisions at (snn)1/2 = 2.76, 5.02, and 7 TeV at the LHC
International Journal of Modern Physics A ( IF 1.6 ) Pub Date : 2020-09-30 , DOI: 10.1142/s0217751x20501675
Khusniddin K. Olimov 1 , Akhtar Iqbal 2 , Samina Masood 3
Affiliation  

The experimental transverse momentum spectra of the charged pions and kaons, protons and antiprotons, produced at midrapidity in inelastic [Formula: see text] collisions at [Formula: see text], 5.02, and 7 TeV, measured by ALICE collaboration, are analyzed systematically using the thermodynamically consistent Tsallis distribution function as well as Hagedorn function with the embedded transverse flow. To compare directly the results obtained from combined (simultaneous) fits with the above theoretical model functions of midrapidity spectra of the charged pions and kaons, protons and antiprotons in [Formula: see text] collisions at [Formula: see text], 5.02, and 7 TeV, we use the optimal identical fitting [Formula: see text] ranges [Formula: see text] in [Formula: see text] collisions at [Formula: see text], 5.02, and 7 TeV. The parameter [Formula: see text] increases consistently for all the particle species with increasing [Formula: see text] of [Formula: see text] collisions from 2.76 to 5.02 TeV, remaining practically constant within fit errors in the collision energy range [Formula: see text] TeV, suggesting probably a saturation and limiting behavior of the [Formula: see text] value in [Formula: see text] collisions at [Formula: see text] TeV. Approximate equality of the extracted nonextensivity parameter [Formula: see text] for the pions and kaons ([Formula: see text]) and relation [Formula: see text] are obtained in [Formula: see text] collisions at [Formula: see text], 5.02, and 7 TeV. Very negligible transverse (radial) flow velocity (consistent with zero value within the fit errors) is obtained in [Formula: see text] collisions at [Formula: see text], 5.02, and 7 TeV from fitting the [Formula: see text] distributions of the charged pions and kaons, protons and antiprotons with the Hagedorn formula with the embedded transverse flow in the selected optimal identical [Formula: see text] ranges as well as in the full measured [Formula: see text] ranges.

中文翻译:

LHC 在 (snn)1/2 = 2.76、5.02 和 7 TeV 处 p + p 碰撞中识别的带电粒子的中速横向动量谱的系统分析

系统地分析了由 ALICE 合作测量的在非弹性 [公式:见文本]、5.02 和 7 TeV 的非弹性 [公式:见文本] 碰撞中快速产生的带电介子和卡介子、质子和反质子的实验横向动量谱使用热力学一致的 Tsallis 分布函数以及嵌入横向流的 Hagedorn 函数。为了直接比较从组合(同时)获得的结果与[公式:见文本]碰撞中[公式:见文本],5.02和7 TeV,我们使用[公式:见文本]范围[公式:见文本]中的[公式:见文本]碰撞[公式:见文本]、5.02和7 TeV的最佳相同拟合。参数[公式:见文本]随着[公式:见文本]碰撞从 2.76 到 5.02 TeV 的增加 [公式:见文本] 持续增加,在碰撞能量范围内的拟合误差内几乎保持恒定 [公式:见文本] TeV , 表明 [公式: 参见文本] TeV 处 [公式: 参见文本] 碰撞中 [公式: 参见文本] 值的饱和和限制行为。在 [公式:参见文本] 碰撞 [公式:参见文本] 中,提取的非扩张性参数 [公式:参见文本] 的近似相等性([公式:参见文本])和关系 [公式:参见文本] ]、5.02 和 7 TeV。非常可忽略的横向(径向)流速(与拟合误差内的零值一致)在 [公式:见文本] 碰撞中获得 [公式:见文本],5.02,
更新日期:2020-09-30
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