D mesons and charmonium states in asymmetric nuclear matter at finite temperatures

Journal Article · Tue Jun 15 00:00:00 EDT 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.81.065204· OSTI ID:21388634

Kumar, Arvind; Mishra, Amruta ^[1]

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1. Department of Physics, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi 110016 (India)

We investigate the in-medium masses of D and D-bar mesons in the isospin-asymmetric nuclear matter at finite temperatures arising due to the interactions with the nucleons, the scalar-isoscalar meson sigma, and the scalar-isovector meson delta within a SU(4) model. However, since the chiral symmetry is explicitly broken for the SU(4) case due to the large charm quark mass, we use the SU(4) symmetry here only to obtain the interactions of the D and D-bar mesons with the light hadron sector but use the observed values of the heavy hadron masses and empirical values of the decay constants. The in-medium masses of J/psi and the excited charmonium states [psi(3686) and psi(3770)] are also calculated in the hot isospin-asymmetric nuclear matter in the present investigation. These mass modifications arise due to the interaction of the charmonium states with the gluon condensates of QCD, simulated by a scalar dilaton field introduced to incorporate the broken scale invariance of QCD within the effective chiral model. The change in the mass of J/psi in the nuclear matter with the density is seen to be rather small, as has been shown in the literature by using various approaches, whereas the masses of the excited states of charmonium [psi(3686) and psi(3770)] are seen to have considerable drop at high densities. The present study of the in-medium masses of D (D-bar) mesons as well as of the charmonium states will be of relevance for the observables from the compressed baryonic matter, like the production and collective flow of the D (D-bar) mesons, resulting from the asymmetric heavy-ion collision experiments planned at the future facility of the GSI Facility for Antiproton and Ion Research. The mass modifications of D and D-bar mesons as well as of the charmonium states in hot nuclear medium can modify the decay of the charmonium states (PSI{sup '},chi{sub c},J/PSI) to DD-bar pairs in the hot dense hadronic matter. The small attractive potentials observed for the D-bar mesons may lead to formation of the D-bar mesic nuclei.

• OSTI ID: 21388634
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 81, Issue 6; Other Information: DOI: 10.1103/PhysRevC.81.065204; (c) 2010 The American Physical Society; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANTIPROTONS
ASYMMETRY
CHIRAL SYMMETRY
CHIRALITY
D MESONS
EXCITED STATES
GLUON CONDENSATION
HEAVY ION REACTIONS
ISOSPIN
ISOVECTORS
J PSI-3097 MESONS
NUCLEAR MATTER
PARTICLE DECAY
PSI-3770 MESONS
QUANTUM CHROMODYNAMICS
QUARKS
SCALE INVARIANCE
SIMULATION
SU-4 GROUPS
ANTIBARYONS
ANTIMATTER
ANTINUCLEI
ANTINUCLEONS
ANTIPARTICLES
BARYONS
BOSONS
CHARM PARTICLES
CHARMED MESONS
CHARMONIUM
DECAY
ELEMENTARY PARTICLES
ENERGY LEVELS
FERMIONS
FIELD THEORIES
HADRONS
INVARIANCE PRINCIPLES
LIE GROUPS
MATTER
MESONS
NUCLEAR REACTIONS
NUCLEI
NUCLEONS
PARTICLE PROPERTIES
PROTONS
PSEUDOSCALAR MESONS
QUANTUM FIELD THEORY
QUARKONIUM
SU GROUPS
SYMMETRY
SYMMETRY GROUPS
TENSORS
VECTOR MESONS
VECTORS