J/ψ near Tc

Taesoo Song, Philipp Gubler, Juhee Hong, Su Houng Lee, Kenji Morita

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1 Citation (Scopus)


We calculate the mass shift and thermal decay width of the J/ψ near the QCD transition temperature Tc by imposing two independent constraints on these variables that can be obtained first by solving the Schrödinger equation and second from the QCD sum rule approach. While the real part of the potential is determined by comparing the QCD sum rule result for charmonium and the D meson to that from the potential model result, the imaginary potential is taken to be proportional to the perturbative form multiplied by a constant factor, which in turn can be determined by applying the two independent constraints. The result shows that the binding energy and the thermal width becomes similar in magnitude at around T=1.09Tc, above which the sum rule analysis also becomes unstable, strongly suggesting that the J/ψ will melt slightly above Tc.

Original languageEnglish
Article number136065
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Publication statusPublished - 2021 Feb 10

Bibliographical note

Funding Information:
The authors acknowledge useful discussions with N. Brambilla and A. Vairo, which partly motivated the work. This work was supported by the Samsung Science and Technology Foundation under Project Number SSTF-BA1901-04 . P.G. is supported by Grant-in-Aid for Early-Carrier Scientists (No. JP18K13542 ), Grant-in-Aid for Scientific Research (C) (No. JP20K03940 ), and the Leading Initiative for Excellent Young Researchers (LEADER) of the Japan Society for the Promotion of Science (JSPS).

Publisher Copyright:
© 2021 The Author(s)

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


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