Un-screened forces in Quark-Gluon Plasma?

Abstract

We study the correlator of temporal Wilson lines at non-zero temperature in 2+1 flavor lattice QCD with the aim to define the heavy quark-antiquark potential at non-zero temperature. For temperatures $153\mathrm{MeV}\le T\le 352\mathrm{MeV}$ the spectral representation of this correlator is consistent with a broadened peak in the spectral function, position or width of which then defines the real or imaginary parts of the heavy quark-antiquark potential at non-zero temperature, respectively. We find that the potential's real part is not screened contrary to the widely-held expectations. We comment on how this fact may modify the picture of quarkonium melting in the quark-gluon plasma.

References in corpus (7)

• The equation of state in (2+1)-flavor QCD
• The QCD Equation of State with almost Physical Quark Masses
• Highly Improved Staggered Quarks on the Lattice, with Applications to Charm Physics
• Static quark-antiquark pairs at finite temperature
• Static quark-antiquark potential in the quark-gluon plasma from lattice QCD
• Nonperturbative potential for study of quarkonia in QGP
• Color Screening in Quantum Chromodynamics

Cited by in corpus (7)

• Centre vortex evidence for a second finite-temperature QCD transition
• In-medium bottomonium properties from lattice NRQCD calculations with extended meson operators
• Static force from generalized Wilson loops on the lattice using the gradient flow
• Thermal modifications of mesons and energy-energy correlators from real-time simulations of a $U(1)$ lattice gauge theory
• Influence of a nontrivial Polyakov loop on the quarkonium states
• Finite Temperature Quarkonia Spectral Functions in the Pseudoscalar Channel
• Wilson loops with neural networks