Meson screening masses from lattice QCD with two light and the strange quark

Abstract

We present results for screening masses of mesons built from light and strange quarks in the temperature range of approximately between 140 MeV to 800 MeV. The lattice computations were performed with 2+1 dynamical light and strange flavors of improved (p4) staggered fermions along a line of constant physics defined by a pion mass of about 220 MeV and a kaon mass of 500 MeV. The lattices had temporal extents Nt = 4, 6 and 8 and aspect ratios of Ns / Nt \geq 4. At least up to a temperature of 140 MeV the pseudo-scalar screening mass remains almost equal to the corresponding zero temperature pseudo-scalar (pole) mass. At temperatures around 3Tc (Tc being the transition temperature) the continuum extrapolated pseudo-scalar screening mass approaches very close to the free continuum result of 2 πT from below. On the other hand, at high temperatures the vector screening mass turns out to be larger than the free continuum value of 2 πT. The pseudo-scalar and the vector screening masses do not become degenerate even for a temperature as high as 4Tc. Using these mesonic spatial correlation functions we have also investigated the restoration of chiral symmetry and the effective restoration of the axial symmetry. We have found that the vector and the axial-vector screening correlators become degenerate, indicating chiral symmetry restoration, at a temperature which is consistent with the QCD transition temperature obtained in previous studies. On the other hand, the pseudo-scalar and the scalar screening correlators become degenerate only at temperatures larger than 1.3Tc, indicating that the effective restoration of the axial symmetry takes place at a temperature larger than the QCD transition temperature.

Published version

References in corpus (9)

• The QCD Equation of State with almost Physical Quark Masses
• Equation of state and QCD transition at finite temperature
• Accelerating Dynamical Fermion Computations using the Rational Hybrid Monte Carlo (RHMC) Algorithm with Multiple Pseudofermion Fields
• Scalar Meson Spectroscopy with Lattice Staggered Fermions
• The Spatial String Tension and Dimensional Reduction in QCD
• Effects of the anomaly on the two-flavor QCD chiral phase transition
• Meson Screening Masses in the Interacting QCD Plasma
• Screening correlators with chiral Fermions
• U_A(1) Anomaly at high temperature: the scalar-pseudoscalar splitting in QCD

Cited by in corpus (41)

• Spectrum of light- and heavy-baryons
• Microscopic Origin of \boldmath{$U_A(1)$} Symmetry Violation in the High Temperature Phase of QCD
• Symmetries of spatial meson correlators in high temperature QCD
• On the strength of the $U_A(1)$ anomaly at the chiral phase transition in $N_f=2$ QCD
• In-medium modifications of open and hidden strange-charm mesons from spatial correlation functions
• Dissociation of heavy quarkonium in hot QCD medium in a quasi-particle model
• Width of the QCD transition in a Polyakov-loop DSE model
• Thermodynamics of strong-interaction matter from Lattice QCD
• Pion spectral properties above the chiral crossover of QCD
• Determination of the strength of the vector-type four-quark interaction in the entanglement Polyakov-extended Nambu-Jona-Lasino model
• Impacts of (inverse) magnetic catalysis on screening masses of neutral pions and sigma mesons in hot and magnetized quark matter
• Thermal properties of light mesons from holography
• Pseudo-scalar meson spectral properties in the chiral crossover region of QCD
• Color Screening in Quantum Chromodynamics
• Intermediate distance correlators in hot Yang-Mills theory
• Anderson localization in QCD-like theories
• Quasi-static probes of the QCD plasma
• Recent lattice QCD results and phase diagram of strongly interacting matter
• Electromagnetic effects in the pion dispersion relation at finite temperature
• Lattice QCD at nonzero temperature and density
• QCD mesonic screening masses using Gribov quantization
• Non-zero temperature study of spin 1/2 charmed baryons using lattice gauge theory
• Chiral condensates and screening masses of neutral pseudoscalar mesons from lattice QCD at physical quark masses
• Chiral symmetry restoration and properties of Goldstone bosons at finite temperature
• Screening masses towards chiral limit
• Light quarks at finite temperature: chiral restoration and the fate of the $U(1{)}_A$ symmetry
• Taste symmetry breaking at finite temperature
• Flavor dependence of the thermal dissociations of vector and axial-vector mesons
• Non-perturbative insights into the spectral properties of QCD at finite temperature
• QCD thermodynamics with two flavours of Wilson fermions on large lattices
• The role of strangeness in chiral and $U(1{)}_A$ restoration
• Quarkonium interactions with (hot) hadronic matter
• Study of some local and global $U(1)$ axial condensates in QCD at finite temperature
• Chiral Aspects of Improved Staggered Fermions with 2+1-Flavors from the HotQCD Collaboration
• Pion screening mass at finite chemical potential
• Testing the strength of the ${\text{U}}_A(1)$ anomaly at the chiral phase transition in two-flavour QCD
• Progress in Lattice QCD at non-zero temperature and QGP
• Probing the chiral and $U(1)$ axial symmetry restoration via meson susceptibilities in holographic QCD
• Unified analysis of screening masses for vector and axial-vector mesons and their diquark partners in the Contact Interaction model
• Static and non-static vector screening masses
• Finite-temperature effects on the threshold cusps in $\pi \pi$ and $D{\bar{D}}^{\ast }$ scatterings from relativistic heavy-ion collisions