2014/12/18 by Heng-Tong Ding, Olaf Kaczmarek, Ding, Heng-Tong +3 · 2 citations
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Nuclear Theory (nucl-th) #Quantum Chromodynamics and Particle Interactions #Theoretical and Computational Physics #hep-lat #hep-ph #nucl-th
paper · pdf · doi:10.48550/arxiv.1412.5869
7 pages, 5 figures, PoS LATTICE 2014
arxiv created 2014/12/18 · openalex publication_date 2014/12/18 · arxiv updated 2014/12/22 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We present new results on the reconstruction of mesonic spectral functions for three temperatures 1.1Tc, 1.2Tc and 1.4Tc in quenched QCD. Making use of non-perturbatively improved clover Wilson valence quarks allows for a clean extrapolation of correlator data to the continuum limit. For the case of vanishing momentum the spectral function is obtained by fitting the data to a well motivated ansatz, using the full covariance matrix of the continuum extrapolated data in the fit. We found that vector correlation function is almost temperature independent in the current temperature window. The electrical conductivity of the hot medium, related to the origin of the vector spectral function at zero momentum, is computed from the resulting parameters at all three temperatures, leading to an estimate of 0.2Cem\lesssim σ/T\lesssim0.4Cem. The dilepton rates resulting from the obtained spectral functions show no significant temperature dependence.