Charmonium mass in nuclear matter
نویسندگان
چکیده
منابع مشابه
Charmonium mass in nuclear matter
The mass shift of charmonium states in nuclear matter is studied in the perturbative QCD approach. The leading-order effect due to the change of gluon condensate in nuclear matter is evaluated using the leadingorder QCD formula, while the higher-twist effect due to the partial restoration of chiral symmetry is estimated using a hadronic model. We find that while the mass of J/c in nuclear matte...
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The masses of charmonium states immersed in nuclear matter are calculated in LO QCD and in QCD sum rules. While the mass shift for J/ψ are found to be less than -10 MeV, those for the χ0,1,2 and ψ(3686) and ψ(3770) are found to be more than -40 MeV. We investigate the feasibility of observing such mass shifts in the future accelerator project at GSI.
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We analyse the kinematic regimes attainable for J/ψ and ψ ′ production in p − A collisions. With this information, we specify the requirements for an experiment to study the interaction of physical charmonium states in nuclear matter, making use of a heavy ion beam incident on a hydrogen or deuterium target.
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Has the quark gluon plasma been discovered at the CERN SPS? Experiment NA50 has reported an abrupt decrease in ψ production in Pb+Pb collisions at 158 GeV per nucleon [1]. Specifically, the collaboration presented a striking ‘threshold effect’ in the ψ–to–continuum ratio by plotting it as a function of a calculated quantity, the mean path length of the ψ through the nuclear medium, L, as shown ...
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ژورنال
عنوان ژورنال: Physical Review C
سال: 2003
ISSN: 0556-2813,1089-490X
DOI: 10.1103/physrevc.67.038202