Locations of Roberge-Weiss transition endpoints in lattice QCD with $N_f=2$ improved KS quarks

Abstract

Result on the locations of the tricritical points of $N_f=2$ lattice QCD with imaginary chemical potential is presented. Simulations are carried out with Symanzik improved gauge action and Asqtad fermion action. With imaginary chemical potential $i{\mu }_I=i\pi T$, previous studies show that the Roberge-Weiss (RW) transition endpoints are triple points at both large and small quark masses, and second order transition points at intermediate quark masses. The triple and second order endpoints are separated by two tricritical ones. Our simulations are carried out at 7 values of quark mass $am$ ranging from 0.024 to 0.070 on lattice volume $12^3\times 4,16^3\times 4,20^3\times 4$. The susceptibility and Binder cumulant of the imaginary part of Polyakov loop are employed to determine the nature of RW transition endpoints. The simulations suggest that the two tricritical points are within the range $0.024-0.026$ and $0.040-0.050$, respectively.

arXiv comment8 pages, 16 figures. arXiv admin note: substantial text overlap with arXiv:1405.2425

References in corpus (28)

• Critical Phenomena and Renormalization-Group Theory
• The chiral and deconfinement aspects of the QCD transition
• The phase diagram of dense QCD
• On the Viability of Lattice Perturbation Theory
• The QCD phase diagram for small densities from imaginary chemical potential
• Finite density QCD via imaginary chemical potential
• Full nonperturbative QCD simulations with 2+1 flavors of improved staggered quarks
• Variants of fattening and flavor symmetry restoration
• Accelerating Dynamical Fermion Computations using the Rational Hybrid Monte Carlo (RHMC) Algorithm with Multiple Pseudofermion Fields
• The chiral critical line of N_f=2+1 QCD at zero and non-zero baryon density
• Lattice QCD on Small Computers
• Constraining the QCD phase diagram by tricritical lines at imaginary chemical potential
• Testing and tuning symplectic integrators for Hybrid Monte Carlo algorithm in lattice QCD
• The chiral critical point of Nf=3 QCD at finite density to the order (mu/T)^4
• The strongly interacting Quark Gluon Plasma, and the critical behaviour of QCD at imaginary chemical potential
• The RHMC Algorithm for 2 Flavours of Dynamical Staggered Fermions
• The order of the Roberge-Weiss endpoint (finite size transition) in QCD
• The chiral phase transition in two-flavor QCD from imaginary chemical potential
• QCD matter in extreme environments
• Accelerating Staggered Fermion Dynamics with the Rational Hybrid Monte Carlo (RHMC) Algorithm
• The Roberge-Weiss endpoint in N_f = 2 QCD
• Quenched hadron spectroscopy with improved staggered quark action
• Roberge-Weiss phase transition and its endpoint
• The nature of the Roberge-Weiss transition in $N_f=2$ QCD with Wilson fermions
• Observation of FSS for a First Order Phase Transition
• Holographic Roberge-Weiss Transitions
• QCD phase diagram at imaginary baryon and isospin chemical potentials
• Nature of Roberge-Weiss transition end points for heavy quarks in $N_f=2$ lattice QCD with Wilson fermions

Cited by in corpus (1)

• Localization properties of Dirac modes at the Roberge-Weiss phase transition