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

Simple item page
dc.contributor.authorDominguez C.A.
dc.contributor.authorLoewe M.
dc.contributor.authorRojas J.C.
dc.contributor.authorZhang Y.
dc.date.accessioned2011-05-15T16:01:09Z
dc.date.available2011-05-15T16:01:09Z
dc.date.issued2010
dc.description.abstractThe thermal evolution of the hadronic parameters of charmonium in the vector channel, i.e. the J/ψ 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 s0 has the same behavior as in all other hadronic channels, i.e. it decreases with increasing temperature until the PQCD threshold s0=4m 2Q is reached at T≃1.22Tc (mQ 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/ψ mass is essentially constant in a wide range of temperatures, while the total width grows with temperature up to T≃1.04Tc beyond which it decreases sharply with increasing T. The resonance coupling is also initially constant beginning to increase monotonically around T≃Tc. This behavior of the total width and of the leptonic decay constant is a strong indication that the J/ψ resonance might survive beyond the critical temperature for deconfinement, in agreement with some recent lattice QCD results. © 2010 American Institute of Physics.fThermal behavior of.
dc.description.versionConference Paper
dc.identifier.citationAIP Conference Proceedings
dc.identifier.citation1296
dc.identifier.issn0094243X
dc.identifier.other10.1063/1.3523159
dc.identifier.urihttp://hdl.handle.net/10019.1/11844
dc.titleThermal behavior of Charmonium in the vector channel from QCD sum rules
dc.typeConference Paper
Files
Collections
Stellenbosch University - Scopus Publications