2017/03/31 by Ken-Ji Araki, Kei Suzuki, Philipp Gubler +1 · 1 citation
Physics and Astronomy · #Atomic physics #Excited state #Ground state #High-Energy Particle Collisions Research #Materials science #Melting temperature #Meson #Particle physics #Particle physics theoretical and experimental studies #Physics #Pseudoscalar #QCD sum rules #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Sum rule in quantum mechanics #hep-lat #hep-ph #nucl-ex #nucl-th
paper · pdf · doi:10.1016/j.physletb.2018.01.072
6 pages, 4 figures; published version
openalex created_date 2017/03/16 · openalex publication_date 2018/02/26 · arxiv created 2018/03/09 · arxiv updated 2018/04/04 · openalex updated_date 2026/08/06
Charmonium spectral functions in vector and pseudoscalar channels at finite temperature are investigated through the complex Borel sum rules and the maximum entropy method. Our approach enables us to extract the peaks corresponding to the excited charmonia, ψ′ and ηc′, as well as those of the ground states, J/ψ and ηc, which has never been achieved in usual QCD sum rule analyses. We show the spectral functions in vacuum and their thermal modification around the critical temperature, which leads to the almost simultaneous melting (or peak disappearance) of the ground and excited states.