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

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.

arXiv comment20 pages, 6 figures. Advances in High Energy Physics, accepted

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Cited by in corpus (3)

• Excitation Functions of Tsallis-like Parameters in High-Energy Nucleus-Nucleus Collisions
• Study of kinetic freeze-out parameters as function of rapidity in pp collisions at CERN SPS energies
• On Extracting Thermal Parameters and Scenario in High-Energy Collisions