Charmonium spectral functions and transport properties of quark-gluon plasma
- We study vacuum masses of charmonia and the charm-quark diffusion coefficient in the quark-gluon plasma based on the spectral representation for meson correlators. To calculate the correlators, we solve the quark gap equation and the inhomogeneous Bethe–Salpeter equation in the rainbow-ladder approximation. It is found that the ground-state masses of charmonia in the pseudoscalar, scalar, and vector channels can be well described. For 1.5Tc<T<3.0Tc, the value of the diffusion coefficient D is comparable with that obtained by lattice QCD and experiments: 3.4<2πTD<5.9. Relating the diffusion coefficient with the ratio of shear viscosity to entropy density η/s of the quark-gluon plasma, we obtain values in the range 0.09<η/s<0.16.
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| Author: | Si-xue QinORCiD, Dirk H. RischkeORCiDGND |
|---|---|
| URN: | urn:nbn:de:hebis:30:3-770059 |
| DOI: | https://doi.org/10.1016/j.physletb.2014.05.060 |
| ISSN: | 0370-2693 |
| Parent Title (English): | Physics Letters B |
| Publisher: | Elsevier |
| Place of publication: | Amsterdam |
| Document Type: | Article |
| Language: | English |
| Date of Publication (online): | 2014/05/23 |
| Date of first Publication: | 2014/05/23 |
| Publishing Institution: | Universitätsbibliothek Johann Christian Senckenberg |
| Release Date: | 2023/10/09 |
| Tag: | Bethe–Salpeter equation; Charmonium; Diffusion coefficient; Dyson–Schwinger equations; Nonperturbative methods; Quark-gluon plasma; Spectral functions; Transport properties |
| Volume: | 734 |
| Page Number: | 5 |
| First Page: | 157 |
| Last Page: | 161 |
| HeBIS-PPN: | 513579281 |
| Institutes: | Physik |
| Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
| Sammlungen: | Universitätspublikationen |
| Licence (German): |  Creative Commons - Namensnennung 3.0 |
