By considering a one-dimensional cross-section through the rough surface, we derive a purely geometrical constraint on the statistical distribution of shadowed facet slopes that should be satissed by any model of surface emissivity that includes the eeect of self-shadowing. Our purpose is not to develop a single shadowing model, but to provide a condition that any valid shadowing model should s...

The effect of gluon shadowing on charm quark production in large impact parameter ultrarelativistic heavy ion collisions is investigated. Charm production cross sections are calculated for a range of non-central impact parameters which can be accurately inferred from the global transverse energy distribution. We show that charm production is a good probe of the local parton density which determ...

Object shadowing is an established programming concept that is supported by languages such as LPC. Thus far, shadowing in LPC appears to have been driven mainly by pragmatics rather than having followed any particular formal evolutionary path. In this paper, we describe the concept of object shadowing and suggest a number of suitable application areas that would benefit from further development...

Gluon shadowing is the main source of expected nuclear effects for production of heavy flavored hadrons. We develop a light-cone dipole approach aiming at simplifying the calculations of nuclear effects, as well as the cross section which does not need nextto-leading and higher order corrections. A substantial process dependence of gluon shadowing is found at the scale of charm mass manifesting...

Within a light-cone quantum-chromodynamics dipole formalism based on the Green function technique, we study nuclear shadowing in deep-inelastic scattering at small Bjorken xBj ∼ < 0.01. Such a formalism incorporates naturally color transparency and coherence length effects. Calculations of the nuclear shadowing for the q̄q Fock component of the photon are based on an exact numerical solution of ...

Within a light-cone quantum-chromodynamics dipole formalism based on the Green function technique, we study nuclear shadowing in deep-inelastic scattering at small Bjorken xBj ∼ < 0.01. Such a formalism incorporates naturally color transparency and coherence length effects. Calculations of the nuclear shadowing for the q̄q Fock component of the photon are based on an exact numerical solution of ...

Abstract In this paper we show that generic continuous Lebesgue measure-preserving circle maps have the s-limit shadowing property. addition, obtain is a property also for maps. particular, implies classical shadowing, periodic and limit are in these two settings as well.

We calculate the shadowing of sea quarks and gluons and show that the shadowing of gluons is not simply given by the sea quark shadowing, especially at small x. The calculations are done in the lab frame approach by using the generalized vector meson dominance model. Here the virtual photon turns into a hadronic fluctuation long before the nucleus. The subsequent coherent interaction with more ...