Temperature is considerably an important and commonly used parameter to study characteristics of matter formed during high-energy nuclear collisions. Experimental data from JINR and UrQMD (latest code 3.3p2) models’ simulations have been used to estimate the temperature and other properties of negative pions in collisions of deuteron with carbon nuclei at an incident momentum of 4.2 GeV/c. Transverse mass and transverse momentum spectra have been used to get the temperature of said particles, with the help of some fittings. These fittings are referred to as Hagedorn Thermodynamic and Boltzmann Distribution functions. Such functions or equations are used to describe the particles spectra. Temperature of negative pions has been found to be equal to 98 ± 2 and 114 ± 2 MeV in experimental and model, respectively, using Hagedorn function. Results from both experimental and model calculations have also been compared with each other and thus most reliable fitting function has been suggested. It is found that Hagedorn Thermodynamic function is the most reliable function to get pions’ temperature in said collision system at given incident momentum. Similarly temperature obtained in this research has been compared with results from other experiments in the world and worthy conclusions have been reached and reported.

温度是研究高能核碰撞过程中形成的物质特征的重要重要且常用的参数。来自JINR和UrQMD（最新代码3.3p2）模型的模拟实验数据已用于估算氘核与碳核碰撞时负动离子在4.2 GeV / c的动量下的温度和其他性质。在一些配件的帮助下，横向质量和横向动量谱已用于获得所述颗粒的温度。这些配件称为Hagedorn热力学和玻尔兹曼分布函数。此类函数或方程式用于描述粒子光谱。使用Hagedorn函数，在实验和模型中发现负离子的温度分别等于98±2 MeV和114±2 MeV。实验和模型计算的结果也已相互比较，因此建议了最可靠的拟合函数。发现在给定的入射动量下，哈德贡热力学函数是在所述碰撞系统中获得离子温度的最可靠函数。类似地，将本研究中获得的温度与世界上其他实验的结果进行了比较，得出了有价值的结论并进行了报道。