منابع مشابه
Nuclear Shadowing and the Proton Structure Function at Small x
A new scaling variable is introduced in terms of which nuclear shadowing in deepinelastic scattering is universal, i.e. independent of A, Q2 and x. This variable can be interpreted as a measure of the number of gluons probed by the hadronic fluctuations of a virtual photon during their lifetime. According to recent data from the H1 and ZEUS experiments, the gluon density in a proton rises steep...
متن کاملLeading twist coherent diffraction on nuclei in deep inelastic scattering at small x and nuclear shadowing
We extend the theory of leading twist nuclear shadowing to calculate leading twist nuclear diffractive parton distribution functions (nDPDFs). We observe that the quark and gluon nPDFs have different patterns of the A-dependence. It is found that the probability of diffraction in the quark channel increases with A, reaching about 30% at x ∼ 10−4 for A ∼ 200, and weakly decreases with Q2. In the...
متن کاملNuclear Structure Functions at Small x from Inelastic Shadowing and Diffraction
N. Armesto, A. Capella, A. B. Kaidalov, J. López-Albacete and C. A. Salgado a Theory Division, CERN, CH-1211 Genève 23, Switzerland b Laboratoire de Physique Théorique, Université de Paris XI, Bâtiment 210, F-91405 Orsay Cedex, France c Institute of Theoretical and Experimental Physics, B. Cheremushkinskaya 25, Moscow 117259, Russia d Departamento de F́ısica, Módulo C2, Planta baja, Campus de Ra...
متن کاملOn the Determination of Small x Shadowing Corrections at HERA
The recent F2 data can be described using the DGLAP evolution equations with an appropriate choice of input distributions and the choice of the starting scale for the Q2 evolution. We demonstrate in this paper that we cannot conclude that there are no significant shadowing corrections at HERA kinematic region using F2 data only. In this paper we calculate the shadowing corrections to the longit...
متن کاملNuclear Shadowing at Low Q
In the light of a recent claim that models of nuclear shadowing which incorporate a vector meson dominance component at low Q2 are incompatible with nuclear deep inelastic scattering data, we compare the predictions of such a model with high precision data on the Q2 dependence of nuclear shadowing. Contrary to this claim, we find that models which incorporate both vector meson and partonic mech...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 1993
ISSN: 0370-2693
DOI: 10.1016/0370-2693(93)91021-e