منابع مشابه
0 An Analysis of the Asymptotic Limit of Gluon Shadowing
We examine the gluon distributions in nuclei in the asymptotic region defined by Q 2 → ∞, x → 0. An analysis using the Double Asymptotic Scaling variables of Ball and Forte is proposed. New scaling relations are predicted which can help disentangling the different mechanisms of low x perturbative QCD evolution in nuclei.
متن کاملGluon shadowing and unitarity effects
New data from HERA experiment on deep inelastic scattering have been used to parametrize nucleon and Pomeron structure functions. Within the Gribov theory, the parameterizations were employed to calculate gluon shadowing for various heavy ions. The latter was compared with predictions from other models. Calculations of multiplicity reduction due to gluon shadowing for d+Au collisions at forward...
متن کاملGluon shadowing in the Glauber-Gribov model
New data from HERA experiment on (diffractive) deep inelastic scattering has been used to parameterize nucleon and Pomeron structure functions. Within the Gribov theory, the parameterizations were employed to calculate gluon shadowing for various heavy ions and compared our results with predictions from other models. Calculations for d+Au collisions at forward rapidities at ultra-relativistic e...
متن کاملPerturbative gluon shadowing in heavy nuclei.
We study how much gluon shadowing can be perturbatively generated through the modified QCD evolution in heavy nuclei. The evolution of small-x gluons is investigated within the semiclassical approximation. The method of characteristics is used to evaluate the shadowed distributions in low-Q and small-x region. In solving the modified evolution equation, we model in simultaneously fusions from i...
متن کاملConstraints for Nuclear Gluon Shadowing from Dis Data
The Q 2 dependence of the ratios of the cross sections of deep inelastic lepton–nucleus scattering is studied in the framework of leading twist, lowest order perturbative QCD. The log Q 2 slope of the ratio F Sn 2 /F C 2 is computed by using the DGLAP evolution equations, and shown to be sensitive to the nuclear gluon distribution functions. Four different parametrizations for the nuclear effec...
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ژورنال
عنوان ژورنال: Nuclear Physics A
سال: 2000
ISSN: 0375-9474
DOI: 10.1016/s0375-9474(00)00025-7