Are the $J/ψ$ and $χ_c A$ Dependencies the Same?

Details Are the $J/ψ$ and $χ_c A$ Dependencies the Same? Are the $J/ψ$ and $χ_c A$ Dependencies the Same?

2001-07-05

arxiv.org/abs/hep-ph/0107045v1

Nucl.Phys. A700 (2002) 539-554

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages, 4 .eps figures

Scientific paper

10.1016/S0375-9474(01)01313-6

It has been empirically observed that the dependence of $J/\psi$ and $\psi'$ production on nuclear mass number $A$ is very similar. This has been postulated to be due to the predominance of color octet pre-resonant states in charmonium production and absorption. Two new experiments, NA60 at CERN and HERA-B at DESY, will measure the $\chi_c$ $A$ dependence for the first time. These measurements should shed new light on the charmonium production and absorption mechanisms.

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