Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1998-09-18
Phys.Rev.Lett. 88 (2002) 232301
Physics
High Energy Physics
High Energy Physics - Phenomenology
Revtex 10 pages and 2 postscript figures
Scientific paper
10.1103/PhysRevLett.88.232301
We propose a model for the production and suppression of J/\psi mesons in high-energy hadronic collisions. We factorized the process into a production of the $c\bar{c}$ pairs of relative momentum $k=k_c-k_{\bar{c}}$ convoluted with a transition probability from the produced $c\bar{c}$ pairs into the observed J/$\psi$ mesons. As the produced $c\bar{c}$ pairs exit the nuclear matter, the multiple scattering between the colored $c$ and $\bar{c}$ and the nuclear medium increases the square of the relative momentum between the $c$ and $\bar{c}, q^2=-k^2$, such that some of the $c\bar{c}$ pairs gain enough invariant mass to transmute into open charm states. With only one parameter, the amount of energy gained by the produced $c\bar{c}$ pair per unit length in the nuclear medium, our model can fit all observed J/\psi suppression data including recent NA50 data from Pb-Pb collisions.
Qiu Jianwei
Vary James P.
Zhang Xiaofei
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