dc.contributor |
Universitat de Barcelona |
dc.contributor.author |
Tolós Rigueiro, Laura |
dc.contributor.author |
Ramos Gómez, Àngels |
dc.contributor.author |
Mizutani, Tetsuro |
dc.date |
2010-04-22T11:56:04Z |
dc.date |
2010-04-22T11:56:04Z |
dc.date |
2008 |
dc.identifier.citation |
0556-2813 |
dc.identifier.citation |
555566 |
dc.identifier.uri |
http://hdl.handle.net/2445/12212 |
dc.format |
11 p. |
dc.format |
application/pdf |
dc.language.iso |
eng |
dc.publisher |
The American Physical Society |
dc.relation |
Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevC.77.015207 |
dc.relation |
Physical Review C, 2008, vol. 77, núm. 1, p. 015207-1-015207-11 |
dc.relation |
http://dx.doi.org/10.1103/PhysRevC.77.015207 |
dc.rights |
(c) The American Physical Society, 2008 |
dc.rights |
info:eu-repo/semantics/openAccess |
dc.subject |
Partícules (Física nuclear) |
dc.subject |
Constitució de la matèria |
dc.subject |
Particles (Nuclear physics) |
dc.subject |
Constitution of matter |
dc.title |
Open charm in nuclear matter at finite temperature |
dc.type |
info:eu-repo/semantics/article |
dc.type |
info:eu-repo/semantics/publishedVersion |
dc.description.abstract |
We study the properties of open-charm mesons ($D$ and $\bar {D}$) in nuclear matter at finite temperature within a self-consistent coupled-channel approach. The meson-baryon interactions are adopted from a type of broken SU(4) s-wave Tomozawa-Weinberg terms supplemented by an attractive scalar-isoscalar attraction. The in-medium solution at finite temperature incorporates Pauli blocking effects, mean-field binding on all the baryons involved, and $\pi$ and open-charm meson self-energies in a self-consistent manner. In the $DN$ sector, the $\Lambda_c$ and $\Sigma_c$ resonances, generated dynamically at 2593 MeV and 2770 MeV in free space, remain close to their free-space position while acquiring a remarkable width due to the thermal smearing of Pauli blocking as well as from the nuclear matter density effects. As a result, the $D$ meson spectral density shows a single pronounced peak for energies close to the $D$ meson free-space mass that broadens with increasing matter density with an extended tail particularly towards lower energies. The $\bar D$ potential shows a moderate repulsive behavior coming from the dominant I=1 contribution of the $\bar D N$ interaction. The low-density theorem is, however, not a good approximation for the $\bar D$ self-energy in spite of the absence of resonance-hole contributions close to threshold in this case. We speculate the possibility of $D$-mesic nuclei as well as discuss some consequences for the $J/\Psi$ suppression in heavy-ion collisions, in particular for the future CBM experiment at FAIR. |