Open charm in nuclear matter at finite temperature

Journal Article · Tue Jan 15 04:00:00 EST 2008 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.77.015207· OSTI ID:21068074

Tolos, L ^[1]; Ramos, A ^[2]; Mizutani, T ^[3]

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1. Frankfurt Institute for Advanced Studies, J. W. Goethe-Universitaet, Ruth-Moufang-Str. 1, D-60438 Frankfurt (Germany)
2. Departament d'Estructura i Constituents de la Materia, Universitat de Barcelona, Diagonal 647, E-08028 Barcelona (Spain)
3. Department of Physics, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061 (United States)

We study the properties of open-charm mesons (D and 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 term supplemented by an attractive scalar-isoscalar interaction. 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}{sub c} and {sigma}{sub c} resonances, generated dynamically at 2593 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 toward lower energies. The D potential shows a moderate repulsive behavior coming from the dominant I=1 contribution of the DN interaction. The low-density theorem is, however, not a good approximation for the 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.

• OSTI ID: 21068074
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 1 Vol. 77; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
APPROXIMATIONS
CHANNELING
COUPLED CHANNEL THEORY
D MESONS
HEAVY ION REACTIONS
J PSI-3097 MESONS
LAMBDA BARYONS
MEAN-FIELD THEORY
MESON-BARYON INTERACTIONS
MEV RANGE
NUCLEAR MATTER
POTENTIALS
S WAVES
SCALARS
SELF-ENERGY
SIGMA BARYONS
SPECTRAL DENSITY
SU-4 GROUPS