scholarly journals Pressure of a weakly magnetized hot and dense deconfined QCD matter in one-loop hard-thermal-loop perturbation theory

2019 ◽  
Vol 100 (3) ◽  
Author(s):  
Aritra Bandyopadhyay ◽  
Bithika Karmakar ◽  
Najmul Haque ◽  
Munshi G. Mustafa
Keyword(s):  
Perturbation Theory ◽  
Hard Thermal Loop

GAUGE INDEPENDENCE OF THE FERMION DAMPING RATE IN A HOT PLASMA - LANDAU GAUGE VS COULOMB GAUGE

1993 ◽  
Vol 08 (08) ◽  
pp. 739-748
Author(s):  
H. NAKKAGAWA ◽  
A. NIÉGAWA ◽  
B. PIRE
Keyword(s):  
Perturbation Theory ◽  
Gluon Propagator ◽  
Landau Gauge ◽  
Coulomb Gauge ◽  
Leading Order ◽  
Loop Order ◽  
Hard Thermal Loop ◽  
Hot Plasma ◽  
Damping Rate

The damping rate of a heavy muon/quark in a hot QED/QCD plasma is calculated in the Landau gauge to the effective one-loop order in the resummed perturbation theory of Braaten and Pisarski. For both a muon/quark at rest and in an energetic case we obtain to leading order the same result as in the Coulomb gauge. Resummation of hard-thermal loop corrections to the photon/gluon propagator is of key importance for this gauge independence.

scholarly journals Hard-thermal-loop perturbation theory to two loops

2002 ◽  
Vol 66 (8) ◽  
Author(s):  
Jens O. Andersen ◽  
Eric Braaten ◽  
Emmanuel Petitgirard ◽  
Michael Strickland
Keyword(s):  
Perturbation Theory ◽  
Hard Thermal Loop

Refractive index of light and the quark-gluon plasma

Open Physics ◽  
2012 ◽  
Vol 10 (6) ◽  
Author(s):  
Juan Liu ◽  
Min-Jie Luo ◽  
Hao-Jie Xu
Keyword(s):  
Refractive Index ◽  
Perturbation Theory ◽  
Quark Gluon Plasma ◽  
Gluon Plasma ◽  
Strongly Coupled ◽  
Hard Thermal Loop ◽  
Optical Phenomenon ◽  
Weakly Coupled ◽  
Holographic Approach

AbstractThe refractive index (RI) of light propagating in a medium of quark-gluon plasma (QGP) is studied. The weakly coupled QGP is studied in the framework of hard-thermal-loop (HTL) perturbation theory, and the strongly coupled one is treated based on the holographic approach. In more realistic setups, the feasibility of observing the optical phenomenon related to the RI of QGP is also discussed.

Hard-thermal-loop QCD trace anomaly

Open Physics ◽  
2012 ◽  
Vol 10 (6) ◽  
Author(s):  
Nan Su
Keyword(s):  
Perturbation Theory ◽  
High Temperatures ◽  
Lattice Data ◽  
Hard Thermal Loop ◽  
Trace Anomaly ◽  
Very High

AbstractIn this proceedings I summarize results of QCD trace anomaly from recent three-loop hard-thermal-loop perturbation theory (HTLpt) calculations. I focus on the trace anomaly scaled by T 2 for pure-glue and N f = 3 QCD. The comparison to available lattice data suggests that for pure-glue QCD agreement between HTLpt results and lattice data for the trace anomaly begins at temperatures above 8 T c while when including quarks (N f = 3) agreement begins already at temperatures above 2 T c. The results in both cases indicate that at very high temperatures the T 2-scaled trace anomaly increases with temperature in accordance with the predictions of HTLpt.

scholarly journals Recent progress in hard-thermal-loop QCD thermodynamics and collective excitations

2015 ◽  
Vol 30 (09) ◽  
pp. 1530025 ◽  
Author(s):  
Nan Su
Keyword(s):  
Perturbation Theory ◽  
Recent Progress ◽  
Heavy Ion ◽  
Collective Excitations ◽  
Effective Theory ◽  
Hard Thermal Loop ◽  
Ion Collisions ◽  
Open Questions ◽  
Massless Mode ◽  
Recent Developments

I review recent developments in QCD thermodynamics and collective excitations from the hard-thermal-loop effective theory. I begin by motivating the discussion with open questions from heavy-ion collisions. I then discuss a finite-temperature and density calculation of QCD thermodynamics at NNLO from the hard-thermal-loop perturbation theory. Finally, I discuss a recent exploration of generalizing the hard-thermal-loop framework to the (chromo)magnetic scale g2T, from which a novel massless mode is uncovered.

scholarly journals Quark number susceptibilities from two-loop hard thermal loop perturbation theory

2013 ◽  
Vol 2013 (7) ◽  
Author(s):  
Najmul Haque ◽  
Munshi G. Mustafa ◽  
Michael Strickland
Keyword(s):  
Perturbation Theory ◽  
Hard Thermal Loop ◽  
Quark Number
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