Study of beta equilibrated2+1flavor quark matter in the Polyakov-Nambu-Jona-Lasinio model

Abstract

We report a first case study of the phase diagram of 2+1 flavor strongly interacting matter in β−equilibrium, using the Polyakov−Nambu−Jona-Lasinio model. Physical characteristics of relevant thermodynamic observables have been discussed. A comparative analysis with the corresponding observables in the Nambu-Jona-Lasinio model is presented. We find distinct differences between the models in terms of a number of thermodynamic quantities like the speed of sound, specific heat, various number densities as well as entropy. The present study is expected to give us a better insight into the role that the superdense matter created in heavy ion collision experiments play in our understanding of the properties of matter inside the core of supermassive stars in the Universe.

Thermodynamic properties of strongly interacting matter in a finite volume using the Polyakov–Nambu–Jona-Lasinio model

“…[3]. Here we shall discuss the effects of finite volume on the properties of strongly interacting matter.…”

“…[6] it has been shown that the freeze-out volume increases as the ffiffi ffi s p increases. Here the authors have estimated the freeze-out volume and found it to vary from 2000 fm 3 to 3000 fm 3 . In a very recent paper [7] the volume of homogeneity has been calculated using UrQMD model [8] and compared with the experimentally available results.…”

“…The ffiffi ffi s p considered was in the range of 62.4 to 2760 GeV for lead-lead collisions at different centralities. The system volume has been found to vary from 50 fm 3 to 250 fm 3 . Given that these are the freeze-out volumes, one can trace back to the initial equilibration time and expect an even smaller system size.…”

Reparametrizing the Polyakov–Nambu–Jona-Lasinio model

“…In ref. [73][74][75][76][77][78][79][80][81][82][83][84][85], the authors have discussed behavioral pattern of different observables as extracted from the PNJL model. The QCD phase structure has also been investigated for imaginary chemical potentials in ref.…”

Beta equilibrated quark matter in PNJL model

“…Deconfined quark matter could also exist in the core of neutron stars (NS), where the density is high. The present study is expected to give us a better insight into the role that the superdense matter created in heavy ion collision experiments play in our understanding of the properties of matter inside the core of supermassive stars in the Universe (Bhattacharyya et al, 2012).…”