Study of QCD critical point using canonical ensemble method

Abstract

The existence of the QCD critical point at non-zero baryon density is not only of great interest for experimental physics but also a challenge for the theory. We use lattice simulations based on the canonical ensemble method to explore the finite baryon density region and look for the critical point. We scan the phase diagram of QCD with three degenerate quark flavors using clover fermions with $m_{\pi }\approx 700MeV$ on $6^3\times 4$ lattices. We measure the baryon chemical potential as we increase the density and we see the characteristic "S-shape" that signals the first order phase transition. We determine the phase boundary by Maxwell construction and report our preliminary results for the location of critical point.

2 pages, 2 figures - To appear in the conference proceedings for Quark Matter 2009, March 30 - April 4, Knoxville, Tennessee

References in corpus (14)

• The order of the quantum chromodynamics transition predicted by the standard model of particle physics
• The QCD transition temperature: results with physical masses in the continuum limit
• The transition temperature in QCD
• Accelerating Dynamical Fermion Computations using the Rational Hybrid Monte Carlo (RHMC) Algorithm with Multiple Pseudofermion Fields
• Canonical partition function and finite density phase transition in lattice QCD
• Finite density QCD with a canonical approach
• The QCD Sign Problem for Small Chemical Potential
• Status of Lattice Studies of the QCD Phase Diagram
• QCD at Zero Baryon Density and the Polyakov Loop Paradox
• Winding expansion techniques for lattice QCD with chemical potential
• U_A(1) Anomaly in Hot and Dense QCD and the Critical Surface
• Canonical fermion determinants in lattice QCD - Numerical evaluation and properties
• Finite Density Simulations with Canonical Ensemble
• The charmed-strange meson spectrum from overlap fermions on domain wall dynamical fermion configurations

Cited by in corpus (14)

• Phase diagram and critical endpoint for strongly-interacting quarks
• QCD Phase Diagram: Phase Transition, Critical Point and Fluctuations
• Nuclear matter within a dilatation-invariant parity doublet model: the role of the tetraquark at nonzero density
• Critical point of $N_f=3$ QCD from lattice simulations in the canonical ensemble
• Solving the sign problems of the massless lattice Schwinger model with a dual formulation
• The effective QCD phase diagram and the critical end point
• The QCD phase diagram from Schwinger-Dyson Equations
• Hadron-quark phase transition in asymmetric matter with boson condensation
• New developments for dual methods in lattice field theory at non-zero density
• Simulation strategies for the massless lattice Schwinger model in the dual formulation
• Strange mass dependence of the tricritical point in the U(3)_L x U(3)_R chiral sigma model
• Investigation of meson masses for real and imaginary chemical potential
• A model study of the chiral phase diagram of QCD
• Chiral Symmetry transition in the Linear Sigma Model with quarks: Counting effective QCD degrees of freedom from low to high temperature