Abstract
The first estimation of the isothermal compressibility (kT) of matter is presented for a wide range of collision energies from √sNN = 7.7 GeV to 2.76 TeV. kT is estimated with the help of event-byevent charged particle multiplicity fluctuations from experiment. Dynamical fluctuations are extracted by removing the statistical fluctuations obtained from the participant model. kT is also estimated from event generators AMPT, UrQMD, EPOS and a hadron resonance gas model. The values of isothermal compressibility are estimated for the Large Hadron Collider (LHC) energies with the help of the event generators.
Highlights
To understand the behaviour of the system formed at high temperature and energy density, it is important to understand the thermodynamic state of matter formed in high-energy heavy-ion collisions
Thermodynamic properties of the system, i.e, a set of response functions, like specific heat, compressibility, and different susceptibilities are directly related to event-by-event fluctuation observables, which are experimentally measurable
Isothermal compressibility is the measure of relative change in volume with respect to change in pressure, at constant temperature
Summary
To understand the behaviour of the system formed at high temperature and energy density, it is important to understand the thermodynamic state of matter formed in high-energy heavy-ion collisions. Thermodynamic properties of the system, i.e, a set of response functions, like specific heat, compressibility, and different susceptibilities are directly related to event-by-event fluctuation observables, which are experimentally measurable
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