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Are the J/psi and chi_c A Dependencies the Same?
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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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Cited by 1 Pith paper
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Absorption of 1$P$-wave heavy charmonium $\chi_{c1}(1P)$ in nuclei
Calculations of excitation functions, momentum spectra, and transparency ratios for χ_c1(1P) on 12C and 184W nuclei demonstrate sensitivity to different absorption cross-section scenarios, proposed for extraction via ...
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