Abstract
We discuss how the spectral changes of quarkonia at Tc can reflect the 'critical' behaviour of QCD phase transition. Starting from the temperature dependences of the energy density and pressure from the lattice QCD calculation, we extract the temperature dependences of the scalar and spin 2-gluon condensates near Tc. We also parameterize these changes into the electric and magnetic condensates near Tc. While the magnetic condensate hardly changes across Tc, we find that the electric condensate increases abruptly above Tc. A 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 language | English |
|---|---|
| Article number | 104024 |
| Journal | Journal of Physics G: Nuclear and Particle Physics |
| Volume | 35 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - 2008 Oct 1 |
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All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
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Properties of quarkonia at Tc. / Lee, Su Houng; Morita, Kenji.
In: Journal of Physics G: Nuclear and Particle Physics, Vol. 35, No. 10, 104024, 01.10.2008.Research output: Contribution to journal › Article
TY - JOUR
T1 - Properties of quarkonia at Tc
AU - Lee, Su Houng
AU - Morita, Kenji
PY - 2008/10/1
Y1 - 2008/10/1
N2 - We discuss how the spectral changes of quarkonia at Tc can reflect the 'critical' behaviour of QCD phase transition. Starting from the temperature dependences of the energy density and pressure from the lattice QCD calculation, we extract the temperature dependences of the scalar and spin 2-gluon condensates near Tc. We also parameterize these changes into the electric and magnetic condensates near Tc. While the magnetic condensate hardly changes across Tc, we find that the electric condensate increases abruptly above Tc. A 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.
AB - We discuss how the spectral changes of quarkonia at Tc can reflect the 'critical' behaviour of QCD phase transition. Starting from the temperature dependences of the energy density and pressure from the lattice QCD calculation, we extract the temperature dependences of the scalar and spin 2-gluon condensates near Tc. We also parameterize these changes into the electric and magnetic condensates near Tc. While the magnetic condensate hardly changes across Tc, we find that the electric condensate increases abruptly above Tc. A 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.
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U2 - 10.1088/0954-3899/35/10/104024
DO - 10.1088/0954-3899/35/10/104024
M3 - Article
VL - 35
JO - Journal of Physics G: Nuclear and Particle Physics
JF - Journal of Physics G: Nuclear and Particle Physics
SN - 0954-3899
IS - 10
M1 - 104024
ER -