Thermal behavior of Charmonium in the vector channel from QCD sum rules

Journal Article · Fri Nov 12 04:00:00 EST 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3523159· OSTI ID:21506744

Dominguez, C A ^[1]; Loewe, M ^[2]; Rojas, J C ^[3]; Zhang, Y ^[1]

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1. Centre for Theoretical Physics and Astrophysics, University of Cape Town, Rondebosch 7700 (South Africa)
2. Facultad de Fisica, Pontificia Universidad Catolica de Chile, Casilla 306, Santiago 22 (Chile)
3. Departamento de Fisica, Universidad Catolica del Norte, Casilla 1280, Antofagasta (Chile)

The thermal evolution of the hadronic parameters of charmonium in the vector channel, i.e. the J/{Psi} resonance mass, coupling (leptonic decay constant), total width, and continuum threshold are analyzed in the framework of thermal Hilbert moment QCD sum rules. The continuum threshold s{sub 0} has the same behavior as in all other hadronic channels, i.e. it decreases with increasing temperature until the PQCD threshold s{sub 0} = 4m{sub Q}{sup 2} is reached at T{approx_equal}1.22T{sub c}(m{sub Q} is the charm quark mass). The other hadronic parameters behave in a very different way from those of light-light and heavy-light quark systems. The J/{Psi} mass is essentially constant in a wide range of temperatures, while the total width grows with temperature up to T{approx_equal}1.04T{sub c} beyond which it decreases sharply with increasing T. The resonance coupling is also initially constant beginning to increase monotonically around T{approx_equal}T{sub c}. This behavior of the total width and of the leptonic decay constant is a strong indication that the J/{Psi} resonance might survive beyond the critical temperature for deconfinement, in agreement with some recent lattice QCD results.

• OSTI ID: 21506744
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1296; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
BASIC INTERACTIONS
BOSONS
CHARMONIUM
COUPLING
CRITICAL TEMPERATURE
D QUARKS
DECAY
ELEMENTARY PARTICLES
EQUATIONS
FERMIONS
FIELD THEORIES
FUNCTIONAL ANALYSIS
HADRONS
INTERACTIONS
J PSI-3097 MESONS
LEPTONIC DECAY
MASS
MATHEMATICS
MESONS
PARTICLE DECAY
PHYSICAL PROPERTIES
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARKONIUM
QUARKS
RESONANCE
SCATTERING
SUM RULES
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
U QUARKS
VECTOR MESONS
WEAK INTERACTIONS
WEAK PARTICLE DECAY