Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1995-08-04
Phys.Lett. B366 (1996) 276-280
Physics
High Energy Physics
High Energy Physics - Phenomenology
7 pages (LaTeX) + 3 uuencoded-compressed-tar postcript figures in a separate file
Scientific paper
10.1016/0370-2693(95)01330-X
We calculate the A-dependence of charm and beauty production cross sections on nuclear targets taking into account the difference of quark and gluon distributions in free nucleons and in nucleus. At comparatively low energies, if $\sigma \sim A^{\alpha}$, the value of $\alpha$ is slightly higher than unity. With the growth of the initial energy the value of $\alpha$ decreases and becomes smaller than unity. We also calculate the values of $\alpha$ for different Feynman-$x$ of the produced $Q\overline{Q}$ pair and obtain that they decrease significantly in the beam fragmentation region.
Armesto Nestor
Pajares Carlos
Salgado Carlos A.
Shabelski Yu M.
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