2014/12/01 by Atsuro Ikeda, A. Ikeda, Masayuki Asakawa +6
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-lat
paper · pdf · doi:10.48550/arxiv.1412.0357
7 pages, 3 figures, talk presented at Lattice 2014. the 32nd International Symposium on Lattice Field Theory, 23-28 June, 2014, Columbia University New York, NY; PoS(LATTICE2014)215
arxiv created 2014/12/01 · openalex publication_date 2014/12/01 · arxiv updated 2014/12/02 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We study the charmonium spectral functions at finite momentum and the dispersion relation of ηc at finite temperature. For the analysis of the spectral function, we use an extended maximum entropy method (MEM). We perform the MEM analysis for the product space of Euclidean correlators in different channels or momenta to incorporate information encoded in correlations among the Euclidean correlators in MEM. We find that this method can improve the error of the reconstructed spectral images. To study the dispersion relation, we introduce a definition of the peak position in the spectral image in which the associated error can be estimated on the basis of MEM. We find that the dispersion relation of ηc at finite temperature follows the Lorentz invariant form even near the dissociation temperature T≃1.7Tc.