Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-04-11
Nucl.Phys. A696 (2001) 833-850
Physics
High Energy Physics
High Energy Physics - Phenomenology
19 pages, 28 figures
Scientific paper
10.1016/S0375-9474(01)01132-0
We present the numerical solution of the non-linear evolution equation for DIS on nuclei for $x = 10^{-2} \div 10^{-7}$. We demonstrate that the solution to the non-linear evolution equation is quite different from the Glauber - Mueller formula which was used as the initial condition for the equation. We illustrate the energy profit for performing DIS experiments on nuclei. However, it turns out that the gain is quite modest: $x_{Au} \simeq 5 x_{\rm proton} $ for the same parton density. We find that the saturation scale $Q^2_s \propto A^{{1/3}}$. For gold the saturation scale $Q_{s,Au} \simeq 1.5 GeV$ at $x= 10^{-3}$. Such a large value leads to considerable contribution of the high density QCD phase to RHIC data and reveals itself in essential damping for both $xG_A$ and $F_{2A}$.
Levin Eugene
Lublinsky Michael
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