Charmonium states in quark-gluon plasma

Su Houng Lee, Kenji Morita

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We discuss how the spectral changes of quarkonia at Tc can reflect the 'critical' behaviour of QCD phase transition. Starting from the temperature dependencies of the energy density and pressure from lattice QCD calculation, we extract the temperature dependencies of the scalar and spin-2 gluon condensates near Tc. We also parametrize these changes into the electric and magnetic condensate near Tc. While the magnetic condensate hardly changes across Tc, we find that the electric condensate increases abruptly above Tc. Similar abrupt change is also seen in the scalar condensate. Using the QCD second-order Stark effect and QCD sum rules, we show that these sudden changes induce equally abrupt changes in the mass and width of J/ψ, both of which are larger than 100 MeV at slightly above Tc,

Original languageEnglish
Pages (from-to)97-108
Number of pages12
JournalPramana - Journal of Physics
Volume72
Issue number1
DOIs
Publication statusPublished - 2009 Jan

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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