SU(3) Polyakov Linear $\sigma$-Model in Magnetic Field: Thermodynamics, Higher-Order Moments, Chiral Phase Structure and Meson Masses

Abstract

Effects of external magnetic field on various properties of the quantum chromodynamics under extreme conditions of temperature and density have been analysed. To this end, we use SU(3) Polyakov linear sigma-model and assume that the external magnetic field eB adds some restrictions to the quarks energy due to the existence of free charges in the plasma phase. In doing this, we apply the Landau theory of quantization. This requires an additional temperature to drive the system through the chiral phase-transition. Accordingly, the dependence of the critical temperature of chiral and confinement phase-transitions on the magnetic field is characterized. Based on this, we have studied the thermal evolution of thermodynamic quantities and the first four higher-order moment of particle multiplicity. Having all these calculations, we have studied the effects of magnetic field on chiral phase-transition. We found that both critical temperature T_c and critical chemical potential increase with increasing the magnetic field eB. Last but not least, the magnetic effects of the thermal evolution of four scalar and four pseudoscalar meson states are studied. We concluded that the meson masses decrease as the temperature increases till T_c. Then, the vacuum effect becomes dominant and rapidly increases with the temperature T. At low T, the scalar meson masses normalized to the lowest Matsubara frequency rapidly decreases as T increases. Then, starting from T_c, we find that the thermal dependence almost vanishes. Furthermore, the meson masses increase with increasing magnetic field. This gives characteristic phase diagram of T vs. external magnetic field $B. At high T, we find that the masses of almost all meson states become temperature independent. It is concluded that the various meson states likely have different T_c's.

35 pages and 18 figures with 59 eps-graphs to appear in Phys. Rev. C. arXiv admin note: text overlap with arXiv:1406.7488

References in corpus (16)

• The Phase Structure of the Polyakov--Quark-Meson Model
• QCD Phase Transition in a Strong Magnetic Background
• Quark matter under strong magnetic fields in the Nambu--Jona-Lasinio Model
• Inverse magnetic catalysis in the (2+1)-flavor Nambu--Jona-Lasinio and Polyakov--Nambu--Jona-Lasinio models
• The chiral condensate in a constant electromagnetic field
• Scalar-pseudoscalar meson behavior and restoration of symmetries in SU(3) PNJL model
• Equilibrium Statistical-Thermal Models in High-Energy Physics
• Analysis of U${}_A$(1) symmetry-breaking and restoration effects on the scalar-pseudoscalar spectrum
• Degrees of freedom and the phase transitions of two flavor QCD
• SU(3) Polyakov Linear Sigma-Model in an External Magnetic Field
• Polyakov SU(3) extended linear $\sigma$-model: Sixteen mesonic states in chiral phase-structure
• Polyakov linear SU(3) sigma model: features of higher order moments in dense and thermal hadronic medium
• Dynamical mass generation in strongly coupled Quantum Electrodynamics with weak magnetic fields
• Does there arise a significant enhancement of the dynamical quark mass in external magnetic field?
• Effects of Quark Interactions on Dynamical Chiral Symmetry Breaking by a Magnetic Field
• A PNJL model in 0+1 Dimensions

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