Specific heat and its high-order moments in relativistic heavy-ion collisions from a multiphase transport model

Abstract

Energy dependence of specific heat extracted from temperature fluctuation of Au + Au collisions at $\sqrt{s_{NN}}$ = 7.7 GeV to 200 GeV was investigated by using a multiphase transport (AMPT) model. The results were compared with those from other models and some differences at low $\sqrt{s_{NN}}$ were found. To explain the above differences and describe the properties of the hot dense matter at low $\sqrt{s_{NN}}$, a new quantity $C_v^{\ast }$ was derived for describing specific heat in heavy-ion collisions. It was found that, by using $C_v^{\ast }$ together with its high order moments (skewness and kurtosis), thermal properties of the hot dense matter can be described and different thermal properties with or without parton process can be clearly distinguished. The proposed observable provides a way to learn the property of QCD matter % phase transition %along with critical point in heavy-ion collisions.

10 pages, 8 figures; Physical Review C (accepted)

References in corpus (18)

• Systematic Measurements of Identified Particle Spectra in pp, d+Au and Au+Au Collisions from STAR
• Temperature in and out of equilibrium: a review of concepts, tools and attempts
• Further developments of a multi-phase transport model for relativistic nuclear collisions
• Evolution of transverse flow and effective temperatures in the parton phase from a multi-phase transport model
• Critical Behavior in Light Nuclear Systems: Experimental Aspects
• Liquid-Gas phase transition in nuclei
• An experimental review of open heavy flavor and quarkonium production at RHIC
• Signatures of $\alpha$ clustering in ${}^{16}$O by using a multiphase transport model
• Impact of magnetic-field fluctuations on measurements of the chiral magnetic effect in collisions of isobaric nuclei
• Novel mechanism for electric quadrupole moment generation in relativistic heavy-ion collisions
• Dynamical exploring the QCD matter at finite temperatures and densities-a short review
• Nonequilibrium kinetic freeze-out properties in relativistic heavy ion collisions from energies employed at the RHIC beam energy scan to those available at the LHC
• Impact of fragment formation on shear viscosity in the nuclear liquid-gas phase transition region
• Interpreting the charge-dependent flow and constraining the chiral magnetic wave with event shape engineering
• Non-extensive statistical distributions of charmed meson production in Pb-Pb and pp($\overline{\text{p}}$) collisions
• Charge-dependent transverse momentum and its impact on the search for the chiral magnetic wave
• Dependence of temperatures and kinetic freeze-out volume on centrality in Au-Au and Pb-Pb collisions at high energy
• Critical temperature of deconfinement in a constrained space using a bag model at vanishing baryon density

Cited by in corpus (3)

• Effects of the $\alpha$-cluster structure and the intrinsic momentum component of nuclei on the longitudinal asymmetry in relativistic heavy-ion collisions
• Information entropy for central ${}^{197}$Au+${}^{197}$Au collisions with the ultrarelativistic quantum molecular dynamics model
• High-order fluctuations of temperature in hot QCD matter