Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1998-02-18
Nucl.Phys. B535 (1998) 351-371
Physics
High Energy Physics
High Energy Physics - Phenomenology
26 pages, including 10 eps-figures
Scientific paper
10.1016/S0550-3213(98)00589-6
Using the NMC and E665 nuclear structure function ratios $F_2^A/F_2^D$ and $F_2^A/F_2^{C}$ from deep inelastic lepton-nucleus collisions, and the E772 Drell--Yan dilepton cross sections from proton-nucleus collisions, and incorporating baryon number and momentum sum rules, we determine nuclear parton distributions at an initial scale $Q_0^2$. With these distributions, we study QCD scale evolution of nuclear parton densities. The emphasis is on small values of $x$, especially on scale dependence of nuclear shadowing. As the main result, we show that a consistent picture can be obtained within the leading twist DGLAP evolution, and in particular, that the calculated $Q^2$ dependence of $F_2^{Sn}/F_2^{C}$ agrees very well with the recent NMC data.
Eskola Kari. J.
Kolhinen Vesa J.
Ruuskanen P. V.
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