# Thermodynamics at Non-Zero Baryon Number Density: A Comparison of Lattice and Hadron Resonance Gas Model Calculations

@article{Karsch2003ThermodynamicsAN, title={Thermodynamics at Non-Zero Baryon Number Density: A Comparison of Lattice and Hadron Resonance Gas Model Calculations}, author={Frithjof Karsch and Krzysztof Redlich and Abdel Nasser Tawfik}, journal={Physics Letters B}, year={2003}, volume={571}, pages={67-74} }

Abstract We compare recent lattice studies of QCD thermodynamics at non-zero quark chemical potential with the thermodynamics of a hadron resonance gas. We argue that for T⩽Tc the equation of state derived from Monte Carlo simulations of two flavour QCD at non-zero chemical potential can be well described by a hadron resonance gas when using the same set of approximations as used in current lattice calculations. We estimate the importance of truncation errors arising from the use of a Taylor… Expand

#### 193 Citations

Thermodynamic properties of strongly interacting matter at non-zero baryon number density

- Physics
- 2004

We present recent lattice results on QCD thermodynamics at non-vanishing baryon number density obtained from a sixth-order Taylor expansion in the chemical potential. Results for bulk thermodynamic… Expand

Heavy ion collisions and lattice QCD at finite baryon density

- Physics
- 2004

We discuss a relation between the
QCD thermodynamics obtained from a statistical analysis of particle production in heavy ion collisions at SPS and RHIC energies and recent LGT results at finite… Expand

QCD Equation of State and Hadron Resonance Gas

- Physics
- 2010

We compare the trace anomaly, strangeness and baryon number fluctuations calculated in lattice QCD with expectations based on hadron resonance gas model. We find that there is a significant… Expand

QCD thermodynamics below deconfinement and heavy-ion collisions

- Physics
- 2005

Recent lattice results on QCD thermodynamics at finite chemical potential and temperature are compared with a phenomenological model of a hadron resonance gas. We argue that the basic properties… Expand

QCD equation of state in a virial expansion

- Physics
- 2009

We describe recent three-flavor QCD lattice data for the pressure, speed of sound and interaction measure at nonzero temperature and vanishing chemical potential within a virial expansion. For the… Expand

Lattice QCD-based equations of state at vanishing net-baryon density

- Physics
- 2014

Abstract We present realistic equations of state for QCD matter at vanishing net-baryon density which embed recent lattice QCD results at high temperatures combined with a hadron resonance gas model… Expand

Equations of state based on recent lattice QCD results at vanishing net-baryon density

- Physics
- 2014

We calculate various equations of state for QCD matter at vanishing net-baryon density starting from recent lattice QCD results at high temperatures, going to low temperatures using a hadron… Expand

From chemical freeze-out to critical conditions in heavy ion collisions

- Physics
- 2005

We compare the statistical thermodynamics of hadron resonance gas with recent LGT results at finite chemical potential. We argue that for T≤T
cthe equation of state derived from Monte-Carlo… Expand

QCD thermodynamics with dynamical fermions

- Physics
- 2011

In this thesis the finite temperature transition between confined and deconfined matter is studied at zero and nonzero quark densities. The findings are relevant for the understanding of the… Expand

QCD thermodynamics with dynamical fermions

- Physics
- 2011

In this thesis the finite temperature transition between confined and deconfined matter is studied at zero and nonzero quark densities. The findings are relevant for the understanding of the… Expand

#### References

SHOWING 1-10 OF 34 REFERENCES

Equation of state of deconfined matter at finite chemical potential in a quasiparticle description

- Physics
- 2000

A quasiparticle description of the thermodynamics of deconfined matter, reproducing both the perturbative limit and nonperturbative lattice QCD data at finite temperature, is generalized to finite… Expand

Finite density QCD via an imaginary chemical potential

- Physics
- 2003

We study QCD at nonzero temperature and baryon density in the framework of
the analytic continuation from imaginary chemical potential. We carry out
simulations of QCD with four flavor of staggered… Expand

Quasiparticle description of the QCD plasma, comparison with lattice results at finite T and mu

- Physics
- 2003

We compare our 2+1 flavor, staggered QCD lattice results with a quasiparticle picture. We determine the pressure, the energy density, the baryon density, the speed of sound and the thermal masses as… Expand

Excited nucleon spectrum using a non-perturbatively improved clover fermion action

- Physics
- 2002

We discuss the extraction of negative-parity baryon masses from lattice QCD calculations. The mass of the lowest-lying negative-parity J = 12− state is computed in quenched lattice QCD using an… Expand

Thermodynamics of large-Nf QCD at finite chemical potential

- Physics
- 2003

We extend the previously obtained results for the thermodynamic potential of hot QCD in the limit of large number of fermions to non-vanishing chemical potential. We give exact results for the… Expand

QCD equations of state and the quark-gluon plasma liquid model

- Physics
- 2003

Recent advances in the study of equations of state of thermal lattice Quantum Chromodynamics obtained at non-zero baryon density allow validation of the quark-gluon plasma (QGP) liquid model… Expand

From QCD lattice calculations to the equation of state of quark matter

- Physics
- 2002

We describe two-flavor QCD lattice data for the pressure at nonzero temperature and vanishing chemical potential within a quasiparticle model. Relying only on thermodynamic consistency, the model is… Expand

The pressure in 2, 2+1 and 3 flavour QCD

- Physics
- 2000

We calculate the pressure in QCD with two and three light quarks on a lattice of size 16 3 × 4 using tree level improved gauge and fermion actions. We argue that for temperatures T > 2Tc systematic… Expand

Negative-parity baryon masses using an O(a)-improved fermion action

- Physics
- 2002

We present a calculation of the mass of the lowest-lying negative-parity J=1/2{sup {minus}} state in quenched QCD. Results are obtained using a non-perturbatively {Omicron}(a)-improved clover fermion… Expand

The QCD phase diagram for small densities from imaginary chemical potential

- Physics
- 2002

Abstract We present results on the QCD phase diagram for μ B ⩽ πT . Our simulations are performed with an imaginary chemical potential μ = iμ I for which the fermion determinant is positive. On an 8… Expand