منابع مشابه
Sequential Charmonium Dissociation
Finite temperature lattice QCD indicates that the charmonium ground state J/ψ can survive in a quark-gluon plasma up to 1.5 T c or more, while the excited states χ c and ψ ′ are dissociated just above T c. We assume that the χ c suffers the same form of suppression as that observed for the ψ ′ in SPS experiments, and that the directly produced J/ψ is unaffected at presently available energy den...
متن کاملCharmonium Dissociation and Recombination: Cold Effects
Thirty years ago, Matsui and Satz proposed the J/ψ destruction as a signal of a Quark Gluon Plasma (QGP) formation, due to the Debye screening between the pair c-cbar. At the light of the recent experimental data, I review the different effects on J/ψ production, from SPS to LHC energies, distinguishing between Cold Nuclear Matter (CNM) and QGP effects. Different possibilities and explanations ...
متن کاملAnomalous J/ψ suppression and charmonium dissociation cross sections
We study J/ψ suppression in Pb+Pb collisions at CERN-SPS energies in hadronic matter with energyand temperature-dependent charmonium dissociation cross sections calculated in the quark-interchange model of Barnes and Swanson. We find that the variation of J/ψ survival probability from peripheral to central collisions can be explained as induced by hadronic matter absorption in central collision...
متن کاملQuark exchange model for charmonium dissociation in hot hadronic matter.
A diagrammatic approach to quark exchange processes in meson-meson scattering is applied to the case of inelastic reactions of the type (Q ¯ Q) + (q¯ q) → (Q¯ q)+(q ¯ Q), where Q and q refer to heavy and light quarks, respectively. This string-flip process is discussed as a microscopic mechanism for charmonium dissociation (absorption) in hadronic matter. The cross section for the reaction J/ψ ...
متن کاملCharmonium and Charmonium–like (?) States
The last few years have witnessed a renaissance in the spectroscopy of heavy quarks. Several long elusive states have now been firmly identified, and several unexpected states have been reported by the high luminosity experiments at Belle, Babar, CLEO, and Fermilab. These discoveries have posed important theoretical questions for our understanding of QCD, and a variety of theoretical models hav...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2006
ISSN: 0370-2693
DOI: 10.1016/j.physletb.2006.03.078