QCD thermodynamics with O(a) improved Wilson fermions at Nf=2

Abstract

We present an update of our study of the phase diagram of two-flavour QCD at zero baryon density with dynamical $O(a)$ improved Wilson quarks. All simulations are done on lattices with a temporal extent of $N_t=16$ and spatial extent $L=32,48$ and 64, ensuring that discretisation effects are small and finite size effects can be controlled. In the approach to the chiral limit we currently have three scans with pion masses between 540 and 200 MeV. In this proceedings article the focus is on the new scan at $m_{\pi }=200$ MeV and the measurement of screening masses. We also present first results concerning a test of scaling in the approach to the chiral limit and the chiral extrapolation of the difference of screening masses in scalar and pseudoscalar channels, which provides a measure for the strength of the anomalous breaking of the $U_A(1)$ symmetry.

7 pages, 5 figures, talk presented at the 31st International Symposium on Lattice Field Theory (Lattice 2013), 29 July - 3 August 2013, Mainz, Germany

References in corpus (10)

• Relevance of the axial anomaly at the finite-temperature chiral transition in QCD
• The QCD chiral transition, $\ua$ symmetry and the Dirac spectrum using domain wall fermions
• Meson screening masses from lattice QCD with two light and the strange quark
• Comparison of the mass preconditioned HMC and the DD-HMC algorithm for two-flavour QCD
• Quasi-static probes of the QCD plasma
• Antiscreening of the Ampere force in QED and QCD plasmas
• Towards the N_f=2 deconfinement transition temperature with O(a) improved Wilson fermions
• QCD thermodynamics with two flavours of Wilson fermions on large lattices
• High Temperature QCD
• Two-flavour lattice QCD correlation functions in the deconfinement transition region

Cited by in corpus (7)

• Study of QCD Phase Diagram with Non-Zero Chiral Chemical Potential
• The pion quasiparticle in the low-temperature phase of QCD
• Chiral dynamics in the low-temperature phase of QCD
• Quark mass dependence of the QCD temperature transition in magnetic fields
• On the axial $U(1)$ symmetry at finite temperature
• QCD at non-zero temperature and magnetic field
• Testing the strength of the ${\text{U}}_A(1)$ anomaly at the chiral phase transition in two-flavour QCD