scholarly journals Heavy quark transport coefficients in a viscous QCD medium with collisional and radiative processes

2021 ◽  
Vol 104 (3) ◽  
Author(s):  
Adiba Shaikh ◽  
Manu Kurian ◽  
Santosh K. Das ◽  
Vinod Chandra ◽  
Sadhana Dash ◽  
...  
Keyword(s):  
Heavy Quark ◽  
Transport Coefficients ◽  
Radiative Processes

scholarly journals Quantifying heavy quark transport coefficients with an improved transport model

2021 ◽  
Vol 1005 ◽  
pp. 122039
Author(s):  
Weiyao Ke ◽  
Yingru Xu ◽  
Steffen Bass
Keyword(s):  
Heavy Quark ◽  
Transport Model ◽  
Transport Coefficients

scholarly journals Non-perturbative Approach to Equation of State and Collective Modes of the QGP

2018 ◽  
Vol 172 ◽  
pp. 05001
Author(s):  
Shuai Y.F. Liu ◽  
Ralf Rappxs
Keyword(s):  
Equation Of State ◽  
Heavy Quark ◽  
Bound States ◽  
Degrees Of Freedom ◽  
Transport Coefficients ◽  
Gluon Plasma ◽  
Spectral Functions ◽  
Full Account ◽  
Perturbative Approach ◽  
Parton Scattering

We discuss a non-perturbative T-matrix approach to investigate the microscopic structure of the quark-gluon plasma (QGP). Utilizing an effective Hamiltonian which includes both light- and heavy-parton degrees of freedoms. The basic two-body interaction includes color-Coulomb and confining contributions in all available color channels, and is constrained by lattice-QCD data for the heavy-quark free energy. The in-medium T-matrices and parton spectral functions are computed selfconsistently with full account of off-shell properties encoded in large scattering widths. We apply the T-matrices to calculate the equation of state (EoS) for the QGP, including a ladder resummation of the Luttinger-Ward functional using a matrix-log technique to account for the dynamical formation of bound states. It turns out that the latter become the dominant degrees of freedom in the EoS at low QGP temperatures indicating a transition from parton to hadron degrees of freedom. The calculated spectral properties of one- and two-body states confirm this picture, where large parton scattering rates dissolve the parton quasiparticle structures while broad resonances start to form as the pseudocritical temperature is approached from above. Further calculations of transport coefficients reveal a small viscosity and heavy-quark diffusion coefficient.

scholarly journals Drag force on heavy quarks and spatial string tension

2018 ◽  
Vol 33 (06) ◽  
pp. 1850041 ◽  
Author(s):  
Oleg Andreev
Keyword(s):  
String Duality ◽  
Drag Coefficient ◽  
Heavy Quark ◽  
Quark Gluon Plasma ◽  
Diffusion Coefficients ◽  
Transport Coefficients ◽  
Gluon Plasma ◽  
String Tension ◽  
Heavy Quarks ◽  
Strongly Coupled

Heavy quark transport coefficients in a strongly coupled Quark–Gluon Plasma can be evaluated using a gauge/string duality and lattice QCD. Via this duality, one can argue that for low momenta the drag coefficient for heavy quarks is proportional to the spatial string tension. Such a tension is well-studied on the lattice that allows one to straightforwardly make non-perturbative estimates of the heavy quark diffusion coefficients near the critical point. The obtained results are consistent with those in the literature.

scholarly journals Resolving discrepancies in the estimation of heavy quark transport coefficients in relativistic heavy-ion collisions

2019 ◽  
Vol 99 (1) ◽  
Author(s):  
Yingru Xu ◽  
Steffen A. Bass ◽  
Pierre Moreau ◽  
Taesoo Song ◽  
Marlene Nahrgang ◽  
...  
Keyword(s):  
Heavy Quark ◽  
Heavy Ion Collisions ◽  
Transport Coefficients ◽  
Heavy Ion ◽  
Relativistic Heavy Ion Collisions ◽  
Ion Collisions

scholarly journals Toward the determination of heavy-quark transport coefficients in quark-gluon plasma

2019 ◽  
Vol 99 (5) ◽  
Author(s):  
Shanshan Cao ◽  
Gabriele Coci ◽  
Santosh Kumar Das ◽  
Weiyao Ke ◽  
Shuai Y. F. Liu ◽  
...  
Keyword(s):  
Heavy Quark ◽  
Quark Gluon Plasma ◽  
Transport Coefficients ◽  
Gluon Plasma

scholarly journals Heavy quark transport in an anisotropic hot QCD medium: Collisional and radiative processes

2021 ◽  
Vol 103 (9) ◽  
Author(s):  
Jai Prakash ◽  
Manu Kurian ◽  
Santosh K. Das ◽  
Vinod Chandra
Keyword(s):  
Heavy Quark ◽  
Radiative Processes

Ionization–radiation physics of laser fusion: the modeler's view

1986 ◽  
Vol 64 (8) ◽  
pp. 998-1005 ◽  
Author(s):  
Dwight Duston
Keyword(s):  
Transport Coefficients ◽  
Point Of View ◽  
Laser Fusion ◽  
Radiation Physics ◽  
Plasma Energy ◽  
Radiative Processes ◽  
Laser Plasmas ◽  
Ionization Radiation ◽  
The Many ◽  
Excitation Processes

Of the many physics issues involved in laser fusion, one of the least understood is the role of ionization and radiation in laser-heated plasmas. Ionization and excitation processes are important since they serve as an energy sink, as well as affecting the various transport coefficients. In addition, the radiative processes occurring in the plasma can not only act as a depletion mechanism for the energy but can also redistribute internal plasma energy from the deposition region to other plasma regions inaccessible via other phenomena. This presentation will be from the point of view of the modeler, whose job it is to make sense of the passive-radiative data obtained by the experimentalist as well as to explain the unobservable phenomena taking place via sophisticated computer models of atomic and radiation physics. Three areas will be discussed: (i) an introduction to the numerical modeling of ionization–radiation in laser plasmas, (ii) radiation diagnostics for laser fusion, and (iii) radiation energetics in laser plasmas.

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