Analyzing transverse momentum spectra by a new method in high-energy collisions

Abstract

We analyzed the transverse momentum spectra of positively and negatively charged pions (${\pi }^{+}$ and ${\pi }^{-}$), positively and negatively charged kaons ($K^{+}$ and $K^{-}$), protons and antiprotons ($p$ and $\bar{p}$), as well as $\varphi$ produced in mid-(pseudo)rapidity region in central nucleus--nucleus (AA) collisions over a center-of-mass energy range from 2.16 to 2760 GeV per nucleon pair. The transverse momentum of the considered particle is regarded as the joint contribution of two participant partons which obey the modified Tsallis-like transverse momentum distribution and have random azimuths in superposition. The calculation of transverse momentum distribution of particles is performed by the Monte Carlo method and compared with the experimental data measured by international collaborations. The excitation functions of effective temperature and other parameters are obtained in the considered energy range. With the increase of collision energy, the effective temperature parameter increases quickly and then slowly. The boundary appears at around 5 GeV, which means the change of reaction mechanism and/or generated matter.

15 pages,5 figures

References in corpus (13)

• Systematic Measurements of Identified Particle Spectra in pp, d+Au and Au+Au Collisions from STAR
• K*(892)${}^0$ and $\Phi$(1020) production in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Measurements of $\varphi$ meson production in relativistic heavy-ion collisions at RHIC
• Production of K+ and of K- Mesons in Heavy-Ion Collisions from 0.6 to 2.0 AGeV Incident Energy
• Production of Light Nuclei in Heavy Ion Collisions Within Multiple Freezeout Scenario
• Systematics of Kinetic Freeze-out Properties in High Energy Collisions from STAR
• Nonextensive effects in the Nambu--Jona-Lasinio model of QCD
• Energy scan/dependence of kinetic freeze-out scenarios of multi-strange and other identified particles in central nucleus-nucleus collisions
• Thermal hadron production in relativistic nuclear collisions
• Thermodynamic properties and transport coefficients of QCD matter within the non-extensive Polyakov-Nambu-Jona-Lasinio model
• Chiral phase transition in linear sigma model with non-extensive statistical mechanics
• Dependence of related parameters on centrality and mass in a new treatment for transverse momentum spectra in high energy collisions
• A matter of shape: seeing the deformation of atomic nuclei at high-energy colliders

Cited by in corpus (2)

• Pseudorapidity dependence of the $p_T$ spectra of charged hadrons in $pp$ collisions at $\sqrt{s}$ = 0.9 and 2.36 TeV
• Analyzing the Correlation Between Thermal and Kinematic Parameters in Various Multiplicity Classes within 7 and 13 TeV pp Collisions