scholarly journals The masses of vector mesons in holographic QCD at finite chiral chemical potential

2015 ◽  
Vol 745 ◽  
pp. 52-55 ◽  
Author(s):  
S.S. Afonin ◽  
A.A. Andrianov ◽  
D. Espriu
Keyword(s):  
Chemical Potential ◽  
Vector Mesons ◽  
Holographic Qcd ◽  
The Masses

scholarly journals Gluodynamics and deconfinement phase transition under rotation from holography

2021 ◽  
Vol 2021 (7) ◽  
Author(s):  
Xun Chen ◽  
Lin Zhang ◽  
Danning Li ◽  
Defu Hou ◽  
Mei Huang
Keyword(s):  
Phase Transition ◽  
Angular Velocity ◽  
Chemical Potential ◽  
Entropy Density ◽  
Thermodynamic Quantities ◽  
Strongly Coupled ◽  
Trace Anomaly ◽  
Holographic Qcd ◽  
Deconfinement Phase Transition ◽  
Small Chemical

Abstract We investigate rotating effect on deconfinement phase transition in an Einstein-Maxwell-Dilaton (EMD) model in bottom-up holographic QCD approach. By constructing a rotating black hole, which is supposed to be dual to rotating strongly coupled nuclear matter, we investigate the thermodynamic quantities, including entropy density, pressure, energy density, trace anomaly, sound speed and specific heat for both pure gluon system and two-flavor system under rotation. It is shown that those thermodynamic quantities would be enhanced by large angular velocity. Also, we extract the information of phase transition from those thermodynamic quantities, as well as the order parameter of deconfinement phase transition, i.e. the loop operators. It is shown that, in the T − ω plane, for two-flavor case with small chemical potential, the phase transition is always crossover. The transition temperature decreases slowly with angular velocity and chemical potential. For pure gluon system with zero chemical potential, the phase transition is always first order, while at finite chemical potential a critical end point (CEP) will present in the T − ω plane.

scholarly journals Melting spectral functions of the scalar and vector mesons in a holographic QCD model

2010 ◽  
Vol 81 (6) ◽  
Author(s):  
Mitsutoshi Fujita ◽  
Toru Kikuchi ◽  
Kenji Fukushima ◽  
Tatsuhiro Misumi ◽  
Masaki Murata
Keyword(s):  
Vector Mesons ◽  
Spectral Functions ◽  
Holographic Qcd

scholarly journals Improved model of vector mesons in holographic QCD

2011 ◽  
Vol 84 (9) ◽  
Author(s):  
Raul Alvares ◽  
Carlos Hoyos ◽  
Andreas Karch
Keyword(s):  
Vector Mesons ◽  
Holographic Qcd ◽  
Improved Model

Thermodynamic properties of light mesons and phase transition in an extended SU(2) NJL model

2019 ◽  
Vol 34 (13) ◽  
pp. 1950070
Author(s):  
J. R. Morones Ibarra ◽  
A. J. Garza Aguirre ◽  
Francisco V. Flores-Baez
Keyword(s):  
Chemical Potential ◽  
Pion Mass ◽  
Quark Condensate ◽  
The Other ◽  
Chiral Symmetry Restoration ◽  
Chiral Phase ◽  
Potential Dependence ◽  
Njl Model ◽  
The Masses ◽  
Sigma Meson

In this work, we study the temperature and chemical potential dependence of the masses of sigma and pion mesons as well as the quark condensate by using a SU(2) flavor version of the Nambu–Jona–Lassino model, introducing a prescription that mimics confinement. We have found that as the temperature increases, the mass of sigma shifts down, while the pion mass remains almost constant. On the other hand, the quark condensate decreases as the temperature and chemical potential increases. We have also analyzed the temperature and chemical potential dependence of the spectral function of the sigma meson, from which we observe at low values of T and [Formula: see text] an absence of a peak. Furthermore, as the Mott temperature is reached, its value increases abruptly and a distinct peak emerges, which is related with the dissociation of the sigma. For the case of [Formula: see text], the Mott dissociation is exhibited about the temperature of 189 MeV. We have also obtained the chiral phase diagram and the meson dissociation for different values of [Formula: see text]. From these results, we can state a relation between chiral symmetry restoration and Mott dissociation.

scholarly journals Finite-temperature spectral function of the vector mesons in a holographic QCD model

2009 ◽  
Vol 80 (3) ◽  
Author(s):  
Mitsutoshi Fujita ◽  
Kenji Fukushima ◽  
Tatsuhiro Misumi ◽  
Masaki Murata
Keyword(s):  
Spectral Function ◽  
Finite Temperature ◽  
Vector Mesons ◽  
Holographic Qcd

scholarly journals Holographic QCD and magnetic fields

2021 ◽  
Vol 57 (7) ◽  
Author(s):  
Umut Gürsoy
Keyword(s):  
Magnetic Fields ◽  
Ground State ◽  
Chemical Potential ◽  
Chiral Condensate ◽  
Magnetic Catalysis ◽  
Large N ◽  
Field Temperature ◽  
Holographic Qcd ◽  
Quark Potential ◽  
Holographic Approach

AbstractWe review the holographic approach to electromagnetic phenomena in large N QCD. After a brief discussion of earlier holographic models, we concentrate on the improved holographic QCD model extended to involve magnetically induced phenomena. We explore the influence of magnetic fields on the QCD ground state, focusing on (inverse) magnetic catalysis of chiral condensate, investigate the phase diagram of the theory as a function of magnetic field, temperature and quark chemical potential, and, finally discuss effects of magnetic fields on the quark–anti-quark potential, shear viscosity, speed of sound and magnetization.

scholarly journals Holographic colour superconductors at finite coupling with NJL Interactions

2021 ◽  
Vol 81 (12) ◽  
Author(s):  
Kazem Bitaghsir Fadafan ◽  
Jesús Cruz Rojas
Keyword(s):  
Equation Of State ◽  
Cooper Pair ◽  
Chemical Potential ◽  
Coupling Parameter ◽  
Einstein Gravity ◽  
Superconducting Phase ◽  
Holographic Model ◽  
Higher Derivative ◽  
Holographic Qcd ◽  
Holographic Description

AbstractWe study a bottom-up holographic description of the QCD colour superconducting phase in the presence of higher derivative corrections. We expand this holographic model in the context of Gauss–Bonnet (GB) gravity. The Cooper pair condensate has been investigated in the deconfinement phase for different values of the GB coupling parameter $$\lambda _{G B}$$ λ GB , we observe a change in the value of the critical chemical potential $$\mu _c$$ μ c in comparison to Einstein gravity. We find that $$\mu _c$$ μ c grows as $$\lambda _{G B}$$ λ GB increases. We add four fermion interactions and show that in the presence of these corrections the main interesting features of the model are still present and that the intrinsic attractive interaction can not be switched off. This study suggests to find GB corrections to equation of state of holographic QCD matter.

scholarly journals CURRENT ALGEBRA BASED EFFECTIVE CHIRAL THEORY OF MESONS AND A NEW EW THEORY

2006 ◽  
Vol 21 (04) ◽  
pp. 950-953
Author(s):  
Bing An Li
Keyword(s):  
Gauge Boson ◽  
Current Algebra ◽  
Axial Vector ◽  
Scalar Fields ◽  
Effective Theory ◽  
Vector Mesons ◽  
Chiral Theory ◽  
Gauge Fixing ◽  
The Masses ◽  
A Current

A current algebra based effective chiral theory of pseudoscalar, vector, axial-vector mesons is reviewed. A new mechanism generating the masses and guage fixing terms of gauge boson is revealed from this effective theory. A EW theory without Higgs is proposed. The masses and gauge fixing terms of W and Z are dynamically generated. Three heavy scalar fields are dynamically generated too. They are ghosts.

scholarly journals Form factors and wave functions of vector mesons in holographic QCD

2007 ◽  
Vol 650 (5-6) ◽  
pp. 421-427 ◽  
Author(s):  
Hovhannes R. Grigoryan ◽  
Anatoly V. Radyushkin
Keyword(s):  
Form Factors ◽  
Wave Functions ◽  
Vector Mesons ◽  
Holographic Qcd
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