Viscosity to entropy ratio of QGP in relativistic heavy ion collision: Hard thermal loop corrections

In this work, we report on our computation results for the best value of the shear viscosity to entropy ratio of quark–gluon plasma produced in the relativistic Au–Au collisions at [Formula: see text][Formula: see text]GeV. Time evolution of heavy quarks distribution functions is calculated by solving the Fokker–Planck evolution equation using the new technique: Iterative Laplace transform method. We compute the drag and diffusion coefficients by considering the hard thermal loop corrections and also temperature dependence running strong coupling, up to complete interactions of leading order.

Download Full-text

Quark–gluon plasma and topological quantum field theory

Modern Physics Letters A ◽

10.1142/s0217732317500560 ◽

2017 ◽

Vol 32 (10) ◽

pp. 1750056

Author(s):

M. J. Luo

Keyword(s):

Field Theory ◽

Critical Temperature ◽

Quark Gluon Plasma ◽

Heavy Ion ◽

Gluon Plasma ◽

Effective Field ◽

Relativistic Heavy Ion Collision ◽

Topological Quantum ◽

Ion Collision ◽

Ordered State

Based on an analogy with topologically ordered new state of matter in condensed matter systems, we propose a low energy effective field theory for a parity conserving liquid-like quark–gluon plasma (QGP) around critical temperature in quantum chromodynamics (QCD) system. It shows that below a QCD gap which is expected several times of the critical temperature, the QGP behaves like topological fluid. Many exotic phenomena of QGP near the critical temperature discovered at Relativistic Heavy Ion Collision (RHIC) are more readily understood by the suggestion that QGP is a topologically ordered state.

Download Full-text

Effect of quark gluon plasma on charm quark produced in relativistic heavy ion collision

Journal of Physics Conference Series ◽

10.1088/1742-6596/509/1/012038 ◽

2014 ◽

Vol 509 ◽

pp. 012038

Author(s):

Mohammed Younus ◽

Dinesh K Srivastava ◽

Steffen A Bass

Keyword(s):

Quark Gluon Plasma ◽

Charm Quark ◽

Heavy Ion ◽

Gluon Plasma ◽

Heavy Ion Collision ◽

Relativistic Heavy Ion Collision ◽

Ion Collision

Download Full-text

Study and Investigation of Hard Photons Emission in Heavy Ion Collisions

NeuroQuantology ◽

10.14704/nq.2021.19.2.nq21018 ◽

2021 ◽

Vol 19 (2) ◽

pp. 61-65

Author(s):

Taghreed A. Younis ◽

Hadi J.M. Al-Agealy

Keyword(s):

Critical Temperature ◽

Quark Gluon Plasma ◽

Heavy Ion Collisions ◽

Heavy Ion ◽

Gluon Plasma ◽

Heavy Ion Collision ◽

Hard Photon ◽

Ion Collisions ◽

Strength Models ◽

Ion Collision

This work involves hard photon rate production from quark -gluon plasma QGP interaction in heavy ion collision. Using a quantum chromodynamic model to investigate and calculation of photons rate in 𝑐𝑔 → 𝑠𝑔𝛾 system due to strength coupling, photons rate, temperature of system, flavor number and critical. The photons rate production computed using the perturbative strength models for QGP interactions. The strength coupling was function of temperature of system, flavor number and critical temperature. Its influenced by force with temperature of system, its increased with decreased the temperature and vice versa. The strength coupling has used to examine the confinement and deconfinement of quarks in QGP properties and influence on the photon rate production. In our approach, we calculate the photons rate depending on the strength coupling, photons rate and temperature of system with other factors. The results plotted as a function of the photons energy. The photons rate was decreased with increased temperature and increased with decreased with strength coupling.

Download Full-text