Properties of J/{psi} at T{sub c}: QCD second-order Stark effect
Journal Article
·
· Physical Review. D, Particles Fields
- Institute of Physics and Applied Physics, Yonsei University, Seoul 120-749 (Korea, Republic of)
Starting from the temperature dependencies of the energy density and pressure from lattice QCD calculation, we extract the temperature dependencies of the electric and magnetic condensate near T{sub c}. While the magnetic condensate hardly changes across T{sub c}, we find that the electric condensate increases abruptly above T{sub c}. This induces a small but equally abrupt decrease in the mass of J/{psi}, which can be calculated through the second-order Stark effect. Combining the present result with the previously determined QCD sum rule constraint, we extract the thermal width of J/{psi} above T{sub c}, which also increases fast. These changes can be identified as the critical behavior of J/{psi} across T{sub c} associated with the phase transition. We find that the mass shift and width broadening of J/{psi} at 1.05T{sub c} will be around -100 MeV and 100 MeV, respectively.
- OSTI ID:
- 21254664
- Journal Information:
- Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 1 Vol. 79; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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