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arXiv · 1911.07419

Excitation functions of related parameters from transverse momentum (mass) spectra in high energy collisions

Li-Li Li·Fu-Hu Liu·Muhammad Waqas·Rasha Al-Yusufi·Altaf Mujear
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Abstract

Transverse momentum (mass) spectra of positively and negatively charged pions, positively and negatively charged kaons, protons and antiprotons produced at mid-(pseudo)rapidity in various collisions at high energies are analyzed in this work. The experimental data measured in central gold-gold, central lead-lead, and inelastic proton-proton collisions by several international collaborations are studied. The (two-component) standard distribution is used to fit the data and extract the excitation function of effective temperature. Then, the excitation functions of kinetic freeze-out temperature, transverse flow velocity, and initial temperature are obtained. In the considered collisions, the four parameters increase with the increase of collision energy in general, and the kinetic freeze-out temperature appears the trend of saturation at the top Relativistic Heavy Ion Collider and the Large Hadron Collider.

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Li-Li Li, Fu-Hu Liu, Muhammad Waqas, Rasha Al-Yusufi, Altaf Mujear. 2019-11-18. Excitation functions of related parameters from transverse momentum (mass) spectra in high energy collisions. https://doi.org/10.1155/2020%2F5356705

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