Production and Suppression of Charmonium in Nuclear Collisions

Qiao, Cong-Feng; Zhang, Xiao-Fei; Chao, Wei-Qin

Production and Suppression of Charmonium in Nuclear Collisions

Authors

Qiao, Cong-Feng

Zhang, Xiao-Fei

Chao, Wei-Qin

Description

$J/ψ$ production cross section considering the contributions of both color-singlet and color-octet $c\bar c$ channels is calculated. The result is used to study the suppression of $J/ψ$ in nuclear collisions. With absorption cross sections for $(c \bar c)_8$ $σ_{abs}^8\simeq 11mb $ and $(c \bar c)_1$ $σ_{abs}^1\simeq 0mb $ the p-A and A-B data except for Pb-Pb can be explained. Possible explanations of additional suppression in Pb-Pb are discussed.
12 pages, 2 figures, Revtex