scholarly journals Transport Coefficient of Gluon Plasma from Lattice QCD

2005 ◽  
Author(s):  
Sunao Sakai ◽  
Atsushi Nakamura
Keyword(s):  
Lattice Qcd ◽  
Transport Coefficient ◽  
Gluon Plasma

scholarly journals Quark Cluster Expansion Model for Interpreting Finite-T Lattice QCD Thermodynamics

Symmetry ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 514
Author(s):  
David Blaschke ◽  
Kirill A. Devyatyarov ◽  
Olaf Kaczmarek
Keyword(s):  
Lattice Qcd ◽  
Cluster Expansion ◽  
Quark Gluon Plasma ◽  
Degrees Of Freedom ◽  
Gluon Plasma ◽  
Polyakov Loop ◽  
Unified Approach ◽  
Narrow Temperature Interval ◽  
Levinson Theorem ◽  
Expansion Model

In this work, we present a unified approach to the thermodynamics of hadron–quark–gluon matter at finite temperatures on the basis of a quark cluster expansion in the form of a generalized Beth–Uhlenbeck approach with a generic ansatz for the hadronic phase shifts that fulfills the Levinson theorem. The change in the composition of the system from a hadron resonance gas to a quark–gluon plasma takes place in the narrow temperature interval of 150–190 MeV, where the Mott dissociation of hadrons is triggered by the dropping quark mass as a result of the restoration of chiral symmetry. The deconfinement of quark and gluon degrees of freedom is regulated by the Polyakov loop variable that signals the breaking of the Z(3) center symmetry of the color SU(3) group of QCD. We suggest a Polyakov-loop quark–gluon plasma model with O(αs) virial correction and solve the stationarity condition of the thermodynamic potential (gap equation) for the Polyakov loop. The resulting pressure is in excellent agreement with lattice QCD simulations up to high temperatures.

scholarly journals Probing jet medium interactions via Z(H) + jet momentum imbalances

2020 ◽  
Vol 80 (12) ◽  
Author(s):  
Lin Chen ◽  
Shu-Yi Wei ◽  
Han-Zhong Zhang
Keyword(s):  
Transport Coefficient ◽  
Good Description ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
High Energy ◽  
Jet Quenching ◽  
Quenching Effect ◽  
Nuclear Collisions ◽  
Ion Collisions ◽  
Pqcd Approach

AbstractDifferent types of high energy hard probes are used to extract the jet transport properties of the Quark-Gluon Plasma created in heavy-ion collisions, of which the heavy boson tagged jets are undoubtedly the most sophisticated due to its clean decay signature and production mechanism. In this study, we used the resummation improved pQCD approach with high order correction in the hard factor to calculate the momentum ratio $$x_J$$ x J distributions of Z and Higgs (H) tagged jets. We found that the formalism can provide a good description of the 5.02 TeV pp data. Using the BDMPS energy loss formalism, along with the OSU 2 + 1D hydro to simulate the effect of the medium, we extracted the value of the jet transport coefficient to be around $${\hat{q}}_0=4\sim 8~\text {GeV}^2/\text {fm}$$ q ^ 0 = 4 ∼ 8 GeV 2 / fm by comparing with the Z + jet PbPb experimental data. The H + jet $$x_J$$ x J distribution were calculated in a similar manner in contrast and found to have a stronger Sudakov effect as compared with the Z + jet distribution. This study uses a clean color-neutral boson as trigger to study the jet quenching effect and serves as a complimentary method in the extraction of the QGP’s transport coefficient in high energy nuclear collisions.

scholarly journals Excited bottomonia in quark-gluon plasma from lattice QCD

2020 ◽  
Vol 800 ◽  
pp. 135119 ◽  
Author(s):  
Rasmus Larsen ◽  
Stefan Meinel ◽  
Swagato Mukherjee ◽  
Peter Petreczky
Keyword(s):  
Lattice Qcd ◽  
Quark Gluon Plasma ◽  
Gluon Plasma

scholarly journals An estimate for the thermal photon rate from lattice QCD

2018 ◽  
Vol 175 ◽  
pp. 07044 ◽  
Author(s):  
Bastian B. Brandt ◽  
Anthony Francis ◽  
Tim Harris ◽  
Harvey B. Meyer ◽  
Aman Steinberg
Keyword(s):  
Lattice Qcd ◽  
Spectral Function ◽  
Production Rate ◽  
Vector Current ◽  
Gluon Plasma ◽  
Vector Channel ◽  
New Correlation ◽  
Current Correlation ◽  
Direct Model ◽  
Ill Posed

We estimate the production rate of photons by the quark-gluon plasma in lattice QCD. We propose a new correlation function which provides better control over the systematic uncertainty in estimating the photon production rate at photon momenta in the range πT/2 to 2πT. The relevant Euclidean vector current correlation functions are computed with Nf = 2 Wilson clover fermions in the chirally-symmetric phase. In order to estimate the photon rate, an ill-posed problem for the vector-channel spectral function must be regularized. We use both a direct model for the spectral function and a modelindependent estimate from the Backus-Gilbert method to give an estimate for the photon rate.

Charmonium spectral functions at finite momenta in the gluon plasma from lattice QCD

2011 ◽  
Vol 38 (12) ◽  
pp. 124109 ◽  
Author(s):  
Chiho Nonaka ◽  
Masayuki Asakawa ◽  
Masakiyo Kitazawa ◽  
Yasuhiro Kohno
Keyword(s):  
Lattice Qcd ◽  
Gluon Plasma ◽  
Spectral Functions

scholarly journals What happens to the $ \Upsilon $ and η b in the quark-gluon plasma? Bottomonium spectral functions from lattice QCD

2011 ◽  
Vol 2011 (11) ◽  
Author(s):  
G. Aarts ◽  
C. Allton ◽  
S. Kim ◽  
M. P. Lombardo ◽  
M. B. Oktay ◽  
...  
Keyword(s):  
Lattice Qcd ◽  
Quark Gluon Plasma ◽  
Gluon Plasma ◽  
Spectral Functions
Sign in / Sign up

Export Citation Format

Share Document