scholarly journals Flavor diagonal and off-diagonal susceptibilities in a quasiparticle model of the quark-gluon plasma

2008 ◽  
Vol 77 (11) ◽  
Author(s):  
M. Bluhm ◽  
B. Kämpfer
Keyword(s):  
Quark Gluon Plasma ◽  
Gluon Plasma ◽  
Quasiparticle Model

Dilepton production as a useful probe of quark gluon plasma with temperature dependent chemical potential quark mass

2016 ◽  
Vol 25 (08) ◽  
pp. 1650049
Author(s):  
Yogesh Kumar ◽  
S. Somorendro Singh
Keyword(s):  
Production Rate ◽  
Quark Gluon Plasma ◽  
Quark Mass ◽  
Chemical Potential ◽  
Gluon Plasma ◽  
Mass Region ◽  
Dilepton Production ◽  
Temperature Dependent ◽  
Quasiparticle Model ◽  
Relevant Range

We extend the previous study of dilepton production using [S. Somorendro Singh and Y. Kumar, Can. J. Phys. 92 (2014) 31] based on a simple quasiparticle model of quark–gluon plasma (QGP). In this model, finite value of quark mass uses temperature dependent chemical potential the so-called Temperature Dependent Chemical Potential Quark Mass (TDCPQM). We calculate dilepton production in the relevant range of mass region. It is observed that the production rate is marginally enhanced from the earlier work. This is due to the effect of TDCPQM and its effect is highly significant in the production of dilepton.

scholarly journals THERMODYNAMIC AND STATISTICAL MECHANICS INCONSISTENCIES IN QUASIPARTICLE MODELS

2013 ◽  
Vol 28 (02) ◽  
pp. 1350006 ◽  
Author(s):  
VISHNU M. BANNUR
Keyword(s):  
Statistical Mechanics ◽  
Phenomenological Models ◽  
Quark Gluon Plasma ◽  
Gluon Plasma ◽  
Point Of View ◽  
Nucl Phys ◽  
Large Temperature ◽  
Lattice Data ◽  
Lattice Gauge ◽  
Quasiparticle Model

Here we reanalyze various quasiparticle models of quark gluon plasma from the statistical mechanics and thermodynamics point of view. We investigate the statistical mechanics and thermodynamics inconsistencies involved in these models and their consequences in the observables. Quasiparticle models are phenomenological models with few parameters and by adjusting them all models fit the results of lattice gauge simulation of gluon plasma [G. Boyd et al., Phys. Rev. Lett.75, 4169 (1995); G. Boyd et al., Nucl. Phys. B469, 419 (1996)]. However, after fixing two of the three parameters of the model by physical arguments, only one quasiparticle model, which is consistent with both statistical mechanics and thermodynamics, fits the Bielefeld lattice data [G. Boyd et al., Phys. Rev. Lett.75, 4169 (1995); G. Boyd et al., Nucl. Phys. B469, 419 (1996)]. The same model also fits the recent lattice results of Wuppertal–Budapest group [S. Borsanyi et al., arXiv:1204.6184v1 [hep-lat]], which deals with precision SU(3) thermodynamics for a large temperature range, reasonably well.

scholarly journals THERMODYNAMICS OF (2+1) FLAVOR QGP IN QUASIPARTICLE MODEL

2012 ◽  
Vol 21 (11) ◽  
pp. 1250090 ◽  
Author(s):  
VISHNU M. BANNUR
Keyword(s):  
Quantum Chromodynamics ◽  
Quark Gluon Plasma ◽  
Chemical Potential ◽  
Scale Parameter ◽  
Gluon Plasma ◽  
Single Parameter ◽  
Lattice Data ◽  
Lattice Simulation ◽  
Quasiparticle Model

Using our recently developed one parameter quasiparticle model, we analyze more recent (refined) results of (2+1)-flavor quark–gluon plasma (QGP) in lattice simulation of quantum chromodynamics (QCD) by various groups [S. Borsanyi et al., arXiv:1007.2580v2; A. Bazavov et al., Phys. Rev. D80 (2009) 014504; T. Umeda et al., arXiv:1011.2548v1; C. DeTar et al., Phys. Rev. D81 (2010) 114504]. We got a remarkable good fit to lattice thermodynamics of [S. Borsanyi et al., arXiv:1007.2580v2] and reasonable good fit to [A. Bazavov et al., Phys. Rev. D80 (2009) 014504] by adjusting single parameter of the model which may be related QCD scale parameter. The same model also fits the lattice results of [S. Borsanyi et al., arXiv:1007.2580v2] on (2+1+1)-flavor QGP. Further, we extend our model for above system with zero chemical potential to nonzero chemical potential and predict quark density without any new parameters which may be compared with future lattice data.

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